Philips ISP1521 User Manual

ISP1521

Hi-Speed Universal Serial Bus hub controller

Rev. 03 — 24 November 2004 Product data

1. General description

The ISP1521 is a stand-alone Universal Serial Bus (USB) hub controller IC that complies with high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s).

The upstream facing port can be connected to a Hi-Speed USB host or hub or to an Original USB hostor hub. If the upstream facingport is connected to a Hi-Speed USB host or hub, then the ISP1521 will operate as a Hi-Speed USB hub. That is, it will support high-speed, full-speed and low-speed devices connected to its downstream facing ports. If the upstream facing port is connected to an Original USB host or hub, then the ISP1521 will operate as an Original USB hub. That is, high-speed devices that are connected to its downstream facing ports will operate in full-speed mode instead.

The ISP1521 is a full hardware USB hub controller. All Original USB devices connected to the downstream facing ports are handled using a single Transaction Translator (TT), when operating in a cross-version environment. This allows the whole 480 Mbit/s upstream bandwidth to be shared by all the Original USB devices on its downstream facing ports.

Universal Serial Bus Speciﬁcation Rev. 2.0

. It supports data transfer at

The ISP1521 has seven downstream facing ports. If not used, ports 3 to 7 can be disabled. The vendor ID, product ID and string descriptors on the hub are supplied by the internal ROM; they can also be supplied by an external I2C-bus™ EEPROM or a microcontroller.

The ISP1521 is suitable for self-powered hub designs. An analog overcurrent detection circuitry is built into the ISP1521, which can also

accept digital overcurrent signals from external circuits; for example, Micrel MOSFET switch MIC2026. The circuitry can be conﬁgured to trip on a global or an individual overcurrent condition.

Each port comes with two status indicator LEDs. Target applications of the ISP1521 are monitor hubs, docking stations for notebooks,

internal USB hub for motherboards, hub for extending Intel® Easy PCs, hub boxes, and so on.

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2. Features

■ Complies with:

■ Supports data transfer at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and

■ Self-powered capability

■ USB suspend mode support

■ Conﬁgurable number of ports

■ Internal power-on reset and low voltage reset circuit

■ Port status indicators

■ Integrates high performance USB interface device with hub handler, Philips Serial

■ Built-in overcurrent detection circuit

■ Individual or ganged power switching, individual or global overcurrent protection,

■ Simple I2C-bus (master/slave) interface to read device descriptor parameters,

■ Visual USB trafﬁc monitoring (GoodLink™) for the upstream facing port

■ Uses 12 MHz crystal oscillator with on-chip Phase-Locked Loop (PLL) for low

■ Supports temperature range from −40 °C to +70 °C

■ Available in LQFP80 package.

ISP1521

Hi-Speed USB hub controller

◆

Universal Serial Bus Speciﬁcation Rev. 2.0

◆ Advanced Conﬁguration and Power Interface (ACPI™), OnNow™ and USB

power management requirements

low-speed (1.5 Mbit/s)

Interface Engine (SIE) and transceivers

and non-removable port support by I/O pins conﬁguration

language ID, manufacturer ID, product ID, serial number ID and string descriptors from a dedicated external EEPROM, or to allow the microcontroller to set up hub descriptors

ElectroMagnetic Interference (EMI)

3. Applications

■ Monitor hubs

■ Docking stations for notebooks

■ Internal hub for USB motherboards

■ Hub for extending Easy PCs

■ Hub boxes.

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4. Abbreviations

ACPI — Advanced Conﬁguration and Power Interface EMI — ElectroMagnetic Interference ESD — ElectroStatic Discharge NAK — Not AcKnowledge PID — Packet IDentiﬁer PLL — phase-Locked Loop SIE — Serial Interface Engine TT — Transaction Translator USB — Universal Serial Bus.

5. Ordering information

Table 1: Ordering information

Type number Package

ISP1521BE LQFP80 plastic low proﬁle quad ﬂat package; 80 leads; body

ISP1521

Hi-Speed USB hub controller

Name Description Version

SOT315-1

12 × 12 × 1.4 mm

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6. Block diagram

Philips Semiconductors

upstream port 0

RREF

RPU DM0 DP0

CC1 CC2 CC3 CC4

GND

11, 50 17, 56 30, 70 13, 52

2, 6, 8, 12, 14, 18, 29, 44, 47, 51, 53, 57, 71

31, 69

TRANSCEIVER

• ORIGINAL USB

• HI-SPEED USB

TRANSACTION

TRANSLATOR

CONTROLLER

ANALOG

PHILIPS PIE

MINI-HOST

PORT 1 PORT 2 to 6 PORT 7

POWER SWITCH

OVERCURRENT

DETECTION

LINK LEDS LINK LEDS

ANALOG TRANSCEIVER

• ORIGINAL USB

• HI-SPEED USB

HUB REPEATER

• ORIGINAL USB

• HI-SPEED USB

ROUTING LOGIC

V V V V

REF(5V0)

12 MHz

XTAL1 XTAL2

43424375

PLL

BIT CLOCK

RECOVERY

PHILIPS SIE

ISP1521

ANALOG

TRANSCEIVER

• ORIGINAL USB

• HI-SPEED USB

RAM ROM

I2C-BUS

CONTROLLER

HUB

CONTROLLER

PORT

CONTROLLER

POWER SWITCH

OVERCURRENT

DETECTION

80 79

41 60

C-bus SDA SCL

RESET_N

HUBGL_N

SUSPEND

ADOC NOOC

Hi-Speed USB hub controller

DM1 DP1

Fig 1. Block diagram.

19 20 23 24 72 73 48 49 36 37 65 66

OC1_N

downstream

port 1

PSW1_N

GRN1_N

AMB1_N

downstream

port 2 to port 6

DM7

DP7

downstream

OC7_N

port 7

PSW7_N

GRN7_N

AMB7_N

ISP1521

MLD710

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7. Pinning information

7.1 Pinning

ISP1521

Hi-Speed USB hub controller

SUSPEND

GND

DM0

DP0

RPU

GND

RREF

GND

DM5

DP5

CC1

GND

CC4

GND

DM6

DP6

CC2

GND

DM1

DP1

SDA

SCL

HUBGL_N

AMB5_N

GRN5_N

AMB6_N

GRN6_N

AMB1_N

GRN1_N

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20

ISP1521BE

GND

V 70

CC3VREF(5V0)

AMB2_N

GRN2_N

AMB7_N

GRN7_N

AMB3_N

GRN3_N

AMB4_N

GRN4_N 61

60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41

NOOC DP4 DM4 GND V

CC2

DP3 DM3 GND V

CC4

GND V

CC1

DP7 DM7 GND DP2 DM2 GND XTAL2 XTAL1 ADOC

MLD712

RESET_N

TEST_LOW

TEST_HIGH

OC1_N

OC6_N

PSW1_N

OC5_N

PSW6_N

GND

PSW5_N

CC3

OC4_N

REF(5V0)

OC3_N

PSW4_N

OC7_N

PSW3_N

OC2_N

PSW7_N

PSW2_N

Fig 2. Pin conﬁguration.

7.2 Pin description

Table 2: Pin description

Symbol

[2]

Pin Type Description

SUSPEND 1 O suspend indicator output; a HIGH level indicates that the hub is

GND 2 - ground supply DM0 3 AI/O upstream facing port 0 D− connection (analog)

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[1]

in the suspend mode

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Table 2: Pin description

Symbol

DP0 4 AI/O upstream facing port 0 D+ connection (analog) RPU 5 AI pull-up resistor connection;connect this pin through a resistor of

GND 6 - ground supply RREF 7 AI referenceresistor connection; connect thispin through a resistor

GND 8 - ground supply DM5 9 AI/O downstream facing port 5 D− connection (analog) DP5 10 AI/O downstream facing port 5 D+ connection (analog) V

CC1

GND 12 - ground supply V

CC4

GND 14 - ground supply DM6 15 AI/O downstream facing port 6 D− connection (analog) DP6 16 AI/O downstream facing port 6 D+ connection (analog) V

CC2

GND 18 - ground supply DM1 19 AI/O downstream facing port 1 D− connection (analog) DP1 20 AI/O downstream facing port 1 D+ connection (analog) TEST_LOW 21 - connect to GND TEST_HIGH 22 - connect to 5.0 V through a 10 kΩ resistor OC1_N 23 AI/I overcurrent sense input for downstream facing port 1

PSW1_N 24 I/O output — power switch control output (open-drain) with an

OC6_N 25 AI/I overcurrent sense input for downstream facing port 6

PSW6_N 26 I/O output — power switch control output (open-drain) with an

OC5_N 27 AI/I overcurrent sense input for downstream facing port 5

PSW5_N 28 I/O output — power switch control output (open-drain) with an

GND 29 - ground supply V

CC3

REF(5V0)

Hi-Speed USB hub controller

[1]

…continued

[2]

Pin Type Description

1.5 kΩ±5 % to 3.3 V

of 12 kΩ±1 % to an analog band gap ground reference

11 - analog supply voltage 1 (3.3 V)

13 - crystal and PLL supply voltage 4 (3.3 V)

17 - transceiver supply voltage 2 (3.3 V)

(analog/digital)

internal pull-up resistor for downstream facing port 1 input — function of the pin when used as an input is given in

Table 5

(analog/digital)

internal pull-up resistor for downstream facing port 6 input — function of the pin when used as an input is given in

Table 5

(analog/digital)

internal pull-up resistor for downstream facing port 5 input — function of the pin when used as an input is given in

Table 5

30 - digital supply voltage 3 (3.3 V) 31 - reference voltage (5 V ± 5 %); used to power internal pull-up

resistors of PSWn_N pins and also for the analog overcurrent detection

ISP1521

[3] [3]

[4] [4]

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Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Table 2: Pin description

Symbol

[2]

Pin Type Description

[1]

…continued

OC4_N 32 AI/I overcurrent sense input for downstream facing port 4

(analog/digital)

PSW4_N 33 I/O output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 4 input — function of the pin when used as an input is given in

Table 5

OC3_N 34 AI/I overcurrent sense input for downstream facing port 3

(analog/digital)

PSW3_N 35 I/O output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 3 input — function of the pin when used as an input is given in

Table 5

OC7_N 36 AI/I overcurrent sense input for downstream facing port 7

(analog/digital)

PSW7_N 37 I/O output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 7 input — function of the pin when used as an input is given in

Table 5

OC2_N 38 AI/I overcurrent sense input for downstream facing port 2

(analog/digital)

PSW2_N 39 I/O output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 2 input — function of the pin when used as an input is given in

Table 5

RESET_N 40 I asynchronous reset input; when reset is active, the internal

switch to the 1.5 kΩ external resistor is opened, and all pins DPn and DMn are three-state; it is recommended that you connect to V

through an RCcircuit; refer to theschematics in

BUS

ISP1521 Hub Demo Board User’s Guide

ADOC 41 I analog or digital overcurrent detect selection input; a LOW

selects digital mode and a HIGH (3.3 Vor 5.0 V) selects analog

mode XTAL1 42 I crystal oscillator input (12 MHz) XTAL2 43 O crystal oscillator output (12 MHz) GND 44 - ground supply DM2 45 AI/O downstream facing port 2 D− connection (analog) DP2 46 AI/O downstream facing port 2 D+ connection (analog)

[4] [4]

GND 47 - ground supply DM7 48 AI/O downstream facing port 7 D− connection (analog) DP7 49 AI/O downstream facing port 7 D+ connection (analog) V

CC1

50 - analog supply voltage 1 (3.3 V)

[3] [3]

GND 51 - ground supply V

CC4

52 - crystal and PLL supply voltage 4 (3.3 V) GND 53 - ground supply DM3 54 AI/O downstream facing port 3 D− connection (analog)

[3]

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Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Table 2: Pin description

Symbol

[2]

Pin Type Description

DP3 55 AI/O downstream facing port 3 D+ connection (analog) V

CC2

56 - transceiver supply voltage 2 (3.3 V)

[1]

…continued

[3]

GND 57 - ground supply DM4 58 AI/O downstream facing port 4 D− connection (analog) DP4 59 AI/O downstream facing port 4 D+ connection (analog)

[3] [3]

NOOC 60 I no overcurrent protection selection input; connect this pin to

HIGH (3.3 V) to select no overcurrent protection; if no overcurrent is selected, all OC_N pins must be connected to V

REF(5V0)

GRN4_N 61 I/O output — green LED port indicator (open-drain) for downstream

facing port 4 input — function of the pin when used as an input is given in

Table 9

AMB4_N 62 I/O output — amber LED port indicator (open-drain) for

downstream facing port 4 input — function of the pin when used as an input is given in

Table 8

GRN3_N 63 I/O output — green LED port indicator (open-drain) for downstream

facing port 3 input — function of the pin when used as an input is given in

Table 9

AMB3_N 64 I/O output — amber LED port indicator (open-drain) for

downstream facing port 3 input — function of the pin when used as an input is given in

Table 8

GRN7_N 65 I/O output — green LED port indicator (open-drain) for downstream

facing port 7 input — function of the pin when used as an input is given in

Table 9

AMB7_N 66 I/O output — amber LED port indicator (open-drain) for

downstream facing port 7 input — function of the pin when used as an input is given in

Table 8

GRN2_N 67 I/O output — green LED port indicator (open-drain) for downstream

facing port 2 input — function of the pin when used as an input is given in

Table 9

AMB2_N 68 I/O output — amber LED port indicator (open-drain) for

downstream facing port 2 input — function of the pin when used as an input is given in

Table 8

REF(5V0)

69 - reference voltage (5 V ± 5 %); used to power internal pull-up

resistors of PSWn_N pins and also for the analog overcurrent detection

CC3

70 - digital supply voltage 3 (3.3 V)

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Table 2: Pin description

Symbol

GND 71 - ground supply GRN1_N 72 I/O output — green LED port indicator (open-drain) for downstream

AMB1_N 73 I/O output — amber LED port indicator (open-drain) for

GRN6_N 74 I/O output — green LED port indicator (open-drain) for downstream

AMB6_N 75 I/O output — amber LED port indicator (open-drain) for

GRN5_N 76 I/O output — green LED port indicator (open-drain) for downstream

AMB5_N 77 I/O output — amber LED port indicator (open-drain) for

HUBGL_N 78 O hub GoodLink LED indicator output; the LED is off until the hub

SCL 79 I/O I SDA 80 I/O I

[2]

Pin Type Description

ISP1521

Hi-Speed USB hub controller

[1]

…continued

facing port 1 input — function of the pin when used as an input is given in

Table 9

downstream facing port 1 input — function of the pin when used as an input is given in

Table 8

facing port 6 input — function of the pin when used as an input is given in

Table 9

downstream facing port 6 input — function of the pin when used as an input is given in

Table 8

facing port 5 input — function of the pin when used as an input is given in

Table 9

downstream facing port 5 input — function of the pin when used as an input is given in

Table 8

is conﬁgured; a transaction between the host and the hub will blink the LED offfor100 ms; this LED isoff in thesuspend mode (open-drain)

C-bus clock (open-drain); see Table 11

C-bus data (open-drain); see Table 11

[1] The maximum current the ISP1521 can sink on a pin is 8 mA. [2] Symbol names ending with underscore N (for example, NAME_N) represent active LOW signals. [3] To disable a downstream port n, connect both pins DPn and DMn to VCC (3.3 V); unused ports must

be disabled in reverse order starting from port 7.

[4] Downstream ports 1 and 2 cannot be disabled.

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Philips Semiconductors

8. Functional description

8.1 Analog transceivers

The integrated transceivers directly interface to USB lines. They can transmit and receive serial data at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s).

8.2 Hub controller core

The main components of the hub core are:

• Philips Serial Interface Engine (SIE)

• Routing logic

• Transaction Translator (TT)

• Mini-host controller

• Hub repeater

• Hub controller

• Port controller

• Bit clock recovery.

ISP1521

Hi-Speed USB hub controller

8.2.1 Philips serial interface engine

The Philips SIE implements the full USB protocol layer. It is completely hardwired for speed and needs no ﬁrmware intervention. The functions of this block include: synchronization, pattern recognition, parallel or serial conversion, bit (de-)stufﬁng, CRC checking and generation, Packet IDentiﬁer veriﬁcation and generation, address recognition, and handshake evaluation and generation.

8.2.2 Routing logic

The routing logic directs signaling to the appropriate modules (mini-host controller, Original USB repeater and Hi-Speed USB repeater) according to the topology in which the hub is placed.

8.2.3 Transaction translator

The TT acts as a go-between mechanism that links devices operating in the Original USB mode and the Hi-Speed USB upstream mode. For the ‘IN’ direction, data is concatenated in TT buffers till the proper length is reached, before the host takes the transaction. In the reverse direction (OUT), the mini-host dispenses the data contained in TT buffers over a period that ﬁts into the Original USB bandwidth. This continues until all outgoing data is emptied. TT buffers are used only on split transactions.

8.2.4 Mini-host controller

The internal mini-host generates all the Original USB IN, OUT or SETUP tokens for the downstream facing ports, while the upstream facing port is in the high-speed mode. The responses from the Original USB devicesare collected in TT buffers, until the end of the complete split transaction clears the TT buffers.

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8.2.5 Hub repeater

A hub repeater is responsible for managing connectivity on a per packet basis. It implements packet signaling connectivity and resume connectivity. There are two repeaters in the ISP1521: a Hi-Speed USB repeater and an Original USB repeater. The only major difference between these two repeaters is the speed at which they operate. When the hub is connected to an Original USB system, it automatically switches itself to function as a pure Original USB hub.

8.2.6 Hub and port controllers

The hub controller provides status report. The port controller provides control for individual downstream facing port; it controls the port routing module. Any port status change will be reported to the host via the hub status change (interrupt) endpoint.

8.2.7 Bit clock recovery

The bit clock recovery circuit extracts the clock from the incoming USB data stream.

8.3 Phase-locked loop clock multiplier

A 12 MHz to 480 MHz clock multiplier PLL is integrated on-chip. This allows the use of low-cost 12 MHz crystals. The low crystal frequency also minimizes ElectroMagnetic Interference (EMI). No external components are required for the operation of the PLL.

ISP1521

Hi-Speed USB hub controller

8.4 I2C-bus controller

A simple serial I2C-bus interface is provided to transfer vendor ID, product ID and string descriptor from an external I2C-busEEPROM (for example,Philips PCF8582 or equivalent) or microcontroller. A master/slave I2C-bus protocol is implemented according to the timing requirements as mentioned in the I2C-bus standard speciﬁcations. The maximum data count during I2C-bus transfers for the ISP1521 is 256 bytes.

8.5 Overcurrent detection circuit

An overcurrent detection circuit is integrated on-chip. The main features of this circuit are: self reporting, automatic resetting, low-trip time and low cost. This circuit offers an easy solution at no extra hardware cost on the board.

8.6 GoodLink

Indication of a good USB connection is provided through GoodLink technology. An LED can be directly connected to pin HUBGL_N via an external 330 Ω resistor.

During enumeration, the LED blinks on momentarily. After successful conﬁguration, the LED blinks off for 100 ms upon each transaction.

This featureprovides a user-friendly indication of the status of the hub, the connected downstream devices and the USB trafﬁc. It is a useful diagnostics tool to isolate faulty USB equipment and helps to reduce ﬁeld support and hotline costs.

8.7 Power-on reset

The ISP1521 has an internal Power-On Reset (POR) circuit.

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Philips Semiconductors

The triggering voltage of the POR circuit is 2.03 V nominal. A POR is automatically generated when VCC goes below the trigger voltage for a duration longer than 1 µs.

ISP1521

Hi-Speed USB hub controller

POR

2.03 V

0 V

≤ 683 µs

004aaa388

At t1: clock is running and available.

Fig 3. Power-on reset timing.

POR

EXTERNAL CLOCK

Stable external clock is to be available at A.

Fig 4. External clock with respect to power-on reset.

004aaa365

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Philips Semiconductors

9. Conﬁguration selections

The ISP1521 is conﬁgured through I/O pins and, optionally, through an external I2C-bus,in which case the hub can updateits conﬁguration descriptors as amaster or as a slave.

Table 3 shows the conﬁguration parameters.

Table 3: Conﬁguration parameters

Mode and selection Option Conﬁguration method

Pin control Software control Control pin Reference Affected ﬁeld Reference

Numberof downstream facing ports

Power switching mode none

Overcurrent protection mode

Non-removable ports any port can be

Port indicator support no

2 ports 3 ports 4 ports 5 ports 6 ports 7 ports

ganged multiple ganged individual

none

[2]

global multiple ganged individual

non-removable

yes

DM1/DP1 to DM7/DP7

PSW1_N to PSW7_N

[1]

NOOC and OC1_N to OC7_N

AMBn_N see Section 9.1.4 wHubCharacteristics:

all GRNn_N see Section 9.1.5 wHubCharacteristics:

see Section 9.1.1 bNbrPorts0 see Table 22

see Section 9.1.2 wHubCharacteristics:

see Section 9.1.3 wHubCharacteristics:

ISP1521

Hi-Speed USB hub controller

see Table 22

bits D1 and D0 bPwrOn2PwrGood:

time interval

see Table 22

bits D4 and D3

see Table 22

bit D2 (compound hub) DeviceRemovable:

bit map

see Table 22

bit D7

[1] Multiple ganged power mode is reported as individual power mode; refer to the USB 2.0 speciﬁcation. [2] When the hub uses the global overcurrent protection mode,the overcurrentindication is throughthe wHubStatus ﬁeld bit 1(overcurrent)

and the corresponding change bit (overcurrent change).

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Philips Semiconductors

9.1 Conﬁguration through I/O pins

9.1.1 Number of downstream facing ports

To discount a physical downstream facing port, connect pins DP and DM of that downstream facing port to VCC (3.3 V) starting from the highest port number (7); see

Table 4.

The sum of physical ports conﬁgured is reﬂected in the bNbrPorts ﬁeld.

Table 4: Downstream facing port number pin conﬁguration

Number of physical downstream facing port

715kΩ

615kΩ

515kΩ

415kΩ

315kΩ

215kΩ

DM1/DP1 DM2/DP2 DM3/DP3 DM4/DP4 DM5/DP5 DM6/DP6 DM7/DP7

pull-down

15 kΩ pull-down

ISP1521

Hi-Speed USB hub controller

15 kΩ pull-down

9.1.2 Power switching

Power switching of downstream ports can be done individually or ganged, where all ports are simultaneously switchedwith onepower switch. TheISP1521 supports both modes, which can be selected using input PSWn_N; see Table 5.

Voltage drop requirements: Self-powered hubs are required to provide a minimum

of 4.75 V to its output port connectors at all legal load conditions. To comply with Underwriters Laboratory Inc. (UL) safety requirements, the power from any port must be limited to 25 W (5 A at 5 V). Overcurrent protection may be implemented on a global or individual basis.

Assuming a 5 V ± 3 % power supply, the worst-case supply voltage is 4.85 V. This only allows a voltage drop of 100 mV across the hub Printed-Circuit Board (PCB) to each downstream connector. This includes a voltage drop across the:

• Power supply connector

• Hub PCB (power and ground traces, ferrite beads)

• Power switch (FET on-resistance)

• Overcurrent sense device.

The PCB resistance and power supply connector resistance may cause a drop of 25 mV, leaving only 75 mV as the voltage drop allowed across the power switch and overcurrent sense device. The individual voltage drop components are shown in

Figure 5.

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Philips Semiconductors

For global overcurrent detection, an increased voltage drop is needed for the overcurrent sense device (in this case, a low-ohmic resistor). This can be realized by using a special power supply of 5.1 V ± 3 %, as shown in Figure 6.

The PCB resistance may cause a drop of 25 mV, which leaves 75 mV for the power switch and overcurrent sense device.

ISP1521

Hi-Speed USB hub controller

voltage drop

25 mV

hub board resistance

4.75 V (min)

(1)

BUS

D+ D− GND SHIELD

004aaa264

downstream

port

connector

5 V

POWER SUPPLY

± 3 % regulated

4.85 V (min)

−

voltage drop

75 mV

ISP1521

power switch

(PSWn_N)

low-ohmic

PMOS switch

(1) Includes PCB traces, ferrite beads, and so on.

Fig 5. Typical voltage drop components in the self-powered mode using individual overcurrent detection.

voltage drop

5.1 V KICK-UP

POWER SUPPLY

± 3 % regulated

4.95 V(min)

−

100 mV

low-ohmic

sense resistor

for overcurrent

detection

(1) Includes PCB traces, ferrite beads, and so on.

voltage drop

75 mV

ISP1521 power

switch

(PSWn_N)

low-ohmic

PMOS switch

voltage drop

25 mV

hub board resistance

4.75 V(min)

(1)

BUS

D+ D− GND SHIELD

004aaa265

downstream

port

connector

Fig 6. Typical voltage drop components in the self-powered mode using global overcurrent detection.

PSWn_N pins have integrated weak pull-up resistors inside the chip.

Table 5: Power switching mode: pin conﬁguration

Power switching mode PSW1_N PSW2_N PSW3_N PSW4_N PSW5_N PSW6_N PSW7_N

None ground ground ground ground ground ground ground Ganged internal

ground ground ground ground ground ground

pull-up

Individual internal

pull-up

internal pull-up

9.1.3 Overcurrent protection mode

The ISP1521 supports all overcurrent protection modes: none, global and individual. No overcurrent protection mode reporting is selected when pin NOOC = HIGH.

Global and individual overcurrent protectionmodes areselected usingpins PSWn_N, following the power switching modes selection scheme; seeTable 6.

For the global overcurrent protection mode, only PSW1_N and OC1_N are active; that is, in this mode, the remaining overcurrent indicator pins are disabled. To inhibit

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the analog overcurrent detection, the OC_N pins must be connected to V

REF(5V0)

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ISP1521

Hi-Speed USB hub controller

Table 6: Overcurrent protection mode pin conﬁguration

Power switching mode NOOC PSW1_N PSW2_N PSW3_N PSW4_N PSW5_N PSW6_N PSW7_N

None HIGH ground ground ground ground ground ground ground Global LOW internal

pull-up

Individual LOW internal

pull-up

ground ground ground ground ground ground

internal pull-up

Both analog and digital overcurrent modes are supported; see Table 7. For digital overcurrent detection, the normal digital TTL level is accepted on the

overcurrent input pins. For analog overcurrent detection, the threshold is given in the DC characteristics. In this mode, to ﬁlter out false overcurrent conditions because of in rush and spikes, a dead time of 15 ms is built into the IC, that is, overcurrent must persist for 15 ms before it is reported to the host.

Table 7: Overcurrent detection mode selection pin conﬁguration

Pin ADOC Mode selection Description

3.3 Vor 5.0 V analog threshold ∆V Ground digital normal digital TTL level

trip

9.1.4 Non-removable port

A non-removable port, by deﬁnition, is a port that is embedded inside the hub application box and is not externally accessible. The LED port indicators (pins AMBn_N) of such a port are not used. Therefore, the corresponding amber LED port indicators are disabled to signify that the port is non-removable; see Table 8.

More than one non-removable port can be speciﬁed by appropriately connecting the corresponding amber LED indicators. At least one port should, however, be left as a removable port.

The detection of any non-removable port sets the hub descriptor into a compound hub.

Table 8: Non-removable port pin conﬁguration

AMBn_N (n=1to7) Non-removable port

Ground non-removable Pull-up with amber LED removable

9.1.5 Port indicator support

The port indicator support can be disabled by grounding all green port indicators (all pins GRNn_N); see Table 9. This is a global feature. It is not possible to disable port indicators for only one port.

Table 9: Port indicator support: pin conﬁguration

GRN1_N to GRN7_N Port indicator support

Ground not supported LED pull-up green LED for at least one port supported

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9.2 Device descriptors and string descriptors settings using I2C-bus

9.2.1 Background information on I2C-bus

The I2C-bus is suitable for bi-directional communication between ICs or modules. It consists of two bi-directional lines: SDA for data signals and SCL for clock signals. Both these lines must be connected to a positive supply voltage through a pull-up resistor.

The basic I2C-bus protocol is deﬁned as:

• Data transfer is initiated only when the bus is not busy.

• Changes in the data line occur when the clock is LOW and must be stable when

Different conditions on I2C-bus: The I2C-bus protocol deﬁnes the following

conditions:

Not busy — both SDA and SCL remain HIGH START — a HIGH-to-LOW transition on SDA, while SCL is HIGH STOP — a LOW-to-HIGH transition on SDA, while SCL is HIGH Data valid — after a STARTcondition, dataon SDAmust be stable for the duration of

the HIGH period of SCL.

ISP1521

Hi-Speed USB hub controller

the clock is HIGH. Any changes in data lines when the clock is HIGH will be interpreted as control signals.

Data transfer: The master initiates each data transfer using a START condition and

terminates it bygenerating a STOP condition. To facilitate the next byte transfer, each byte of data must be acknowledged bythe receiver. Theacknowledgement is done by pulling the SDA line LOW on the ninth bit of the data. An extra clock pulse needs to be generated by the master to accommodate this bit.

For more detailed information on the operation of the bus, refer to

speciﬁcation

I2C-bus address: The address of the ISP1521 is given in Table 10.

Table 10: I2C-bus slave address

Bit A7 A6 A5 A4 A3 A2 A1 R/W Value 00110100/1

MSB Slave address LSB

The I2C-bus

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9.2.2 Architecture of conﬁgurable hub descriptors

HUB CORE

Hi-Speed USB hub controller

MICROCONTROLLER SERIAL EEPROM

signature

match

DESCRIPTOR

GENERATOR

INTERFACE

MUX

ISP1521

I2C-bus

MASTER/SLAVE

C-BUS INTERFACE

RAM

(256 bytes)

ROM

(256 bytes)

MLD711

The I2C-bus cannot be shared between the EEPROM and the external microcontroller.

Fig 7. Conﬁgurable hub descriptors.

The conﬁgurable hub descriptors can be masked in the internal ROM memory; see

Figure 7. These descriptors can also be supplied from an external EEPROM or a

microcontroller. The ISP1521 implements both the master and slave I2C-bus controllers. The information from the external EEPROM or the microcontroller is transferredinto the internal RAM during the power-on reset. A signature word is used to identify correct descriptors. If the signature matches, the content of the RAM is chosen instead of the ROM.

When the external microcontroller mode is selected and while the external microcontroller is writing to the internal RAM, any request to conﬁgurable descriptors will be responded to with a Not AcKnowledge (NAK). There is no speciﬁed time-out period for the NAK signal. This data is then passed to the host during the enumeration process.

The three conﬁguration methods are selectedby connecting pins SCLand SDAin the manner given in Table 11.

Table 11: Conﬁguration method

Conﬁguration method SCL SDA

Internal ROM ground ground External EEPROM 2.2 kΩ to 4.7 kΩ pull-up 2.2 kΩ to 4.7 kΩ pull-up External microcontroller driven LOW by the

microcontroller during reset

2.2 kΩ to 4.7 kΩ pull-up

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9.2.3 ROM or EEPROM map

ISP1521

Hi-Speed USB hub controller

00H 02H

0AH

10H

7FH 80H

FFH

Fig 8. ROM or EEPROM map.

Remark: A 128-byte EEPROM supports one language ID only, and a 256-byte

EEPROM supports two language IDs.

9.2.4 ROM or EEPROM detailed map

Table 12: ROM or EEPROM detailed map

Address (hex)

Signature descriptor

00 signature (low) 55 - signature to signify valid data comment 01 signature (high) AA -

Device descriptor

02 idVendor (low) CC - Philips Semiconductors vendor ID 03 idVendor (high) 04 04 idProduct (low) 21 - ISP1521 product ID 05 idProduct (high) 15 06 bcdDevice (low) 00 - device release; silicon revision 07 bcdDevice (high) 02 08 RSV, iSN, iP, iM - 00 if all the three strings are supported, the

09 reserved - FF -

String descriptor Index 0 (language ID)

0A bLength 0B bDescriptorType - 03 0C wLANGID[0] - 09 LANGID code zero (ﬁrst language ID) 0D - 04 0E wLANGID[1] - 09 LANGID code one (second language ID) 0F - 08

String descriptor Index 1 (iManufacturer)

10 bLength - 2E string descriptor length (manufacturer ID)

Content Default

(hex)

[1]

- 06 two language ID support

Signature

Device Descriptor

Language ID

String Descriptor (first Language ID): iManufacturer string

iProduct string

iSerial Number string

String Descriptor

(second Language ID):

iManufacturer string

iProduct string

iSerial Number string

Example

Comment

(hex)

increments this value

value of this byte is 39H

[2]

STRING

(English—USA in this example)

(English—UK in this example)

[3]

MLD714

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Hi-Speed USB hub controller

Table 12: ROM or EEPROM detailed map

Address (hex)

Content Default

(hex)

11 bDescriptorType - 03

…continued

Example (hex)

[2]

Comment

STRING 12 13 bString - 50 00 P of Philips 14 15 - 68 00 h 16 17 - 69 00 i 18 19 - 6C 00 l 1A 1B - 69 00 i 1C 1D - 70 00 p 1E 1F - 73 00 s 20 21 - 20 00 22 23 - 53 00 S of Semiconductors 24 25 - 65 00 e 26 27 - 6D 00 m 28 29 - 69 00 i 2A 2B - 63 00 c 2C 2D - 6F 00 o 2E 2F - 6E 00 n 30 31 - 64 00 d 32 33 - 75 00 u 34 35 - 63 00 c 36 37 - 74 00 t 38 39 - 6F 00 o 3A 3B - 72 00 r 3C 3D - 73 00 s

String descriptor Index 2 (iProduct)

3E bLength - 10 string descriptor length (product ID) 3F bDescriptorType - 03

[2]

STRING 40 41 bString - 49 00 I of ISP1521 42 43 - 53 00 S 44 45 - 50 00 P 46 47 - 31 00 1 48 49 - 35 00 5 4A 4B - 32 00 2 4C 4D - 31 00 1

String descriptor Index 3 (iSerialNumber) Remark: If supported, this string must be unique.

4E bLength - 3A string descriptor length (serial number) 4F bDescriptorType - 03

[2]

STRING 50 51 bString - 39 00 9 of 947337877678 = wired support 52 53 - 34 00 4 54 55 - 37 00 7

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Hi-Speed USB hub controller

Table 12: ROM or EEPROM detailed map

Address (hex)

56 57 - 33 00 3 58 59 - 33 00 3 5A 5B - 37 00 7 5C 5D - 38 00 8 5E 5F - 37 00 7 60 61 - 37 00 7 62 63 - 36 00 6 64 65 - 37 00 7 66 67 - 38 00 8 68 69 - 20 00 6A 6B - 3D 00 = 6C 6D - 20 00 6E 6F - 77 00 w 70 71 - 69 00 i 72 73 - 72 00 r 74 75 - 65 00 e 76 77 - 64 00 d 78 79 - 20 00 7A 7B - 73 00 s 7C 7D - 75 00 u 7E 7F - 70 00 p 80 81 - 70 00 p 82 83 - 6F 00 o 84 85 - 72 00 r 86 87 - 74 00 t

String descriptor Index 1 (iManufacturer) second language

88 bLength - 2E string descriptor length (manufacturer ID) 89 bDescriptorType - 03 8A 8B bString - 50 00 P of Philips 8C 8D - 68 00 h 8E 8F - 69 00 i 90 91 - 6C 00 l 92 93 - 69 00 i 94 95 - 70 00 p 96 97 - 73 00 s 98 99 - 20 00 9A 9B - 53 00 S of Semiconductors 9C 9D - 65 00 e 9E 9F - 6D 00 m A0 A1 - 69 00 i

Content Default

(hex)

…continued

Example (hex)

[2]

Comment

STRING

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Hi-Speed USB hub controller

Table 12: ROM or EEPROM detailed map

Address (hex)

Content Default

(hex)

…continued

Example (hex)

Comment

A2 A3 - 63 00 c A4 A5 - 6F 00 o A6 A7 - 6E 00 n A8 A9 - 64 00 d AA AB - 75 00 u AC AD - 63 00 c AE AF - 74 00 t B0 B1 - 6F 00 o B2 B3 - 72 00 r B4 B5 - 73 00 s

String descriptor Index 2 (iProduct)

B6 bLength - 10 B7 bDescriptorType - 03

[1] [2]

string descriptors (product ID)

STRING B8 B9 bString - 49 00 I of ISP1521 BA BB - 53 00 S BC BD - 50 00 P BE BF - 31 00 1 C0 C1 - 35 00 5 C2 C3 - 32 00 2 C4 C5 - 31 00 1

String descriptor Index 3 (iSerialNumber)

C6 bLength - 16 C7 bDescriptorType - 03

[1] [2]

string descriptors (serial number)

STRING C8 C9 bString - 36 00 6 of 6568824022 CA CB - 35 00 5 CC CD - 36 00 6 CE CF - 38 00 8 D0 D1 - 38 00 8 D2 D3 - 32 00 2 D4 D5 - 34 00 4 D6 D7 - 30 00 0 D8 D9 - 32 00 2 DA DB - 32 00 2 DC DD - FF FF DE DF - FF FF E0 E1 - FF FF E2 E3 - FF FF E4 E5 - FF FF E6 E7 - FF FF E8 E9 - FF FF

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Hi-Speed USB hub controller

Table 12: ROM or EEPROM detailed map

Address (hex)

EA EB - FF FF EC ED - FF FF EE EF - FF FF F0 F1 - FF FF F2 F3 - FF FF F4 F5 - FF FF F6 F7 - FF FF F8 F9 - FF FF FA FB - FF FF FC FD - FF FF FE - FF FF - FF upper boundary of all string descriptors

[1] If this string descriptor is not supported, this bLength ﬁeld must be programmed with the value 02H. [2] If this string descriptor is not supported, this bDescriptorType ﬁeld must be used (programmed with

[3] String descriptor index (iManufacturer)starts from the address 0EH for one language ID support and

Content Default

(hex)

any value, for example, 03H).

10H for two languages ID support.

…continued

Example (hex)

Comment

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10. Hub controller description

Each USB device is composed of several independent logic endpoints. An endpoint acts as a terminus of communication ﬂow between the host and the device. At design time, each endpoint is assigned a unique number (endpoint identiﬁer; see Table 13). The combination of the device address (given by the host during enumeration), the endpoint number and the transfer direction allows each endpoint to be uniquely referenced.

The ISP1521 has two endpoints: endpoint 0 (control) and endpoint 1 (interrupt).

Table 13: Hub endpoints

Function Endpoint

Hub ports 0 to 7 0 control OUT 64

[1] IN: input for the USB host; OUT: output from the USB host.

Hi-Speed USB hub controller

Transfer type Direction

identiﬁer

IN 64

1 interrupt IN 1

[1]

ISP1521

Maximum packet size (bytes)

10.1 Endpoint 0

According to the USB speciﬁcation, all devices must implement a default control endpoint. This endpoint is used by the host to conﬁgure the USB device. It provides access to the device conﬁguration and allows generic USB status and control access.

The ISP1521 supports the following descriptor information through its control endpoint 0:

• Device descriptor

• Device_qualiﬁer descriptor

• Conﬁguration descriptor

• Interface descriptor

• Endpoint descriptor

• Hub descriptor

• Other_speed_conﬁguration descriptor.

The maximum packet size of this endpoint is 64 bytes.

10.2 Endpoint 1

Endpoint 1 can be accessed only after the hub has been conﬁgured by the host (by sending the Set Conﬁguration command). It is used by the ISP1521 to send the status change information to the host.

Endpoint 1 is an interrupt endpoint. The host polls this endpoint once every 255 ms. After the hub is conﬁgured, an IN token is sent by the host to request the port change status. If the hub detects no change in the port status, it returns a NAK to this request, otherwise the Status Change byte is sent. Table 14 shows the content of the change byte.

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Table 14: Status Change byte: bit allocation

Bit Name Value Description

0 Hub Status Change 0 no change in the hub status

1 to 7 Port n Status Change 0 no change in the status of port n (n=1to7)

11. Descriptors

The ISP1521 hub controller supports the following standard USB descriptors:

• Device

• Device_qualiﬁer

• Other_speed_conﬁguration

• Conﬁguration

• Interface

• Endpoint

• Hub.

ISP1521

Hi-Speed USB hub controller

1 change in the hub status detected

1 change in the status of port n (n = 1 to 7)

The hub returns different descriptors based on the mode of operation: full-speed or high-speed.

Table 15: Device descriptor

Offset (bytes)

0 bLength 12 12 descriptor length = 18 bytes 1 bDescriptorType 01 01 type = DEVICE 2 bcdUSB 00 00 see USB speciﬁcation Rev. 2.0 30202 4 bDeviceClass 09 09 HUB_CLASSCODE 5 bDeviceSubClass 00 00 HubSubClassCode 6 bDeviceProtocol 00 01 HubProtocolHSpeedOneTT 7 bMaxPacketSize0 40 40 packet size = 64 bytes 8 idVendor CC CC Philips Semiconductors vendor ID (04CC); can be 90404 10 idProduct 21 21 the ISP1521 product ID; can be customized 11 15 15 12 bcdDevice 00 00 device ID; can be customized 13 02 02 14 iManufacturer 01 01 can be customized 15 iProduct 02 02 can be customized 16 iSerialNumber 03 03 can be customized; this value must be unique 17 bNumConﬁgurations 01 01 one conﬁguration

Field name Value (hex) Comments

Full-speed High-speed

customized

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Hi-Speed USB hub controller

Table 16: Device_qualiﬁer descriptor

Offset (bytes)

0 bLength 0A 0A descriptor length = 10 bytes 1 bDescriptorType 06 06 type = DeviceQualiﬁerType 2 bcdUSB 00 00 see USB speciﬁcation Rev. 2.0 30202 4 bDeviceClass 09 09 HUB_CLASSCODE 5 bDeviceSubClass 00 00 HubSubClassCode 6 bDeviceProtocol 00 01 HubProtocolHSpeedOneTT 7 bMaxPacketSize0 40 40 packet size = 64 bytes 8 bNumConﬁgurations 01 01 number of conﬁgurations

Table 17: Other_speed_conﬁguration descriptor

Offset (bytes)

0 bLength 09 09 descriptor length=9bytes 1 bDescriptorType 07 07 type = OtherSpeedConﬁgurationType 2 wTotalLength 19 19 TotalConfByte 30000 4 bNumInterfaces 01 01 5 bConﬁgurationValue 01 01 6 iConﬁguration 00 00 no string supported 7 bmAttributes E0 E0 self-powered

8 bMaxPower 00 00 self-powered

Field name Value (hex) Comments

Full-speed High-speed

Field name Value (hex) Comments

Full-speed High-speed

A0 A0 others

ISP1521

Table 18: Conﬁguration descriptor

Offset (bytes)

0 bLength 09 09 descriptor length=9bytes 1 bDescriptorType 02 02 type = CONFIGURATION 2 wTotalLength 19 19 total length of conﬁguration, interface and endpoint 30000 4 bNumInterfaces 01 01 one interface 5 bConﬁgurationValue 01 01 conﬁguration value = 1 6 iConﬁguration 00 00 no conﬁguration string descriptor 7 bmAttributes E0 E0 self-powered 8 bMaxPower

[1] Value in units of 2 mA.

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Field name Value (hex) Comments

Full-speed High-speed

descriptors = 25 bytes

[1]

00 00 self-powered

Philips Semiconductors

Hi-Speed USB hub controller

Table 19: Interface descriptor

Offset (bytes)

0 bLength 09 09 descriptor length=9bytes 1 bDescriptorType 04 04 type = INTERFACE 2 bInterfaceNumber 00 00 3 bAlternateSetting 00 00 no alternate setting 4 bNumEndpoints 01 01 status change (interrupt) endpoint 5 bInterfaceClass 09 09 HUB_CLASSCODE 6 bInterfaceSubClass 00 00 HubSubClassCode 7 bInterfaceProtocol 00 00 8 bInterface 00 00 no interface string descriptor

Table 20: Endpoint descriptor

Offset (bytes)

0 bLength 07 07 descriptor length=7bytes 1 bDescriptorType 05 05 type = ENDPOINT 2 bEndpointAddress 81 81 endpoint 1 at the address number 1 3 bmAttributes 03 03 interrupt endpoint 4 wMaxPacketSize 01 01 packet size = 1 byte 50000 6 bInterval FF 0C polling interval

Field name Value (hex) Comments

Full-speed High-speed

Field name Value (hex) Comments

Full-speed High-speed

ISP1521

Table 21: Hub descriptor

Offset (bytes)

0 bDescLength 09 09 descriptor length=9bytes 1 bDescriptorType 29 29 type = HUB 2 bNbrPorts 07 07 number of enabled downstream facing ports; selectable by

3 wHubCharacteristics A9 A9 see Table 22 40000 5 bPwrOn2PwrGood

6 bHubContrCurrent 64 64 7 DeviceRemovable 00 00 seven downstream facing ports, no embedded port 8 PortPwrCtrlMask FF FF -

[1] Value in units of 2 ms.

Field name Value (hex) Comments

Full-speed High-speed

06 06 05 05 04 04 03 03 02 02

[1]

32 32 ganged or individual mode = 100 ms 00 00 no power switching mode=0ms

DP/DM strapping

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Table 22: wHubCharacteristics bit description

Bit Function Value Description

D0, D1 logical power switching mode 00 ganged

D2 compound hub selection 0 non-compound

D3, D4 overcurrent protection mode 00 global

D5 - - D6 - - D7 port indicator 0 global feature

ISP1521

Hi-Speed USB hub controller

01 individual and multiple ganged 10 none 11 -

1 compound

01 individual and multiple ganged 10 none 11 -

12. Hub requests

The hub must react to a variety of requests initiated by the host. Some requests are standard and are implemented by any USB device whereas others are hub-class speciﬁc requests.

12.1 Standard USB requests

Table 23 shows the supported standard USB requests.

Table 23: Standard USB requests

bmRequestType

Request

Address

Set Address 0000 0000 05 device

Conﬁguration

Get Conﬁguration 1000 0000 08 00, 00 00, 00 01, 00 conﬁguration value Set Conﬁguration (0) 0000 0000 09 00, 00 00, 00 00, 00 none Set Conﬁguration (1) 0000 0000 09 01, 00 00, 00 00, 00 none

Descriptors

Get Conﬁguration Descriptor

Get Device Descriptor 1000 0000 06 00, 01 00, 00 length Get String Descriptor (0) 1000 0000 06 03, 00 00, 00 length Get String Descriptor (1) 1000 0000 06 03, 01 00, 00 length Get String Descriptor (2) 1000 0000 06 03, 02 00, 00 length Get String Descriptor (3) 1000 0000 06 03, 03 00, 00 length

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byte 0 (bits 7 to 0)

1000 0000 06 00, 02 00, 00 length

bRequest byte 1 (hex)

wValue bytes 2, 3 (hex)

address

[1]

wIndex bytes 4, 5 (hex)

00, 00 00, 00 none

wLength bytes 6, 7 (hex)

Data response

[2]

conﬁguration interface and endpoint descriptors

[2]

device descriptor

[2]

language ID descriptor

[2]

manufacturer string

[2]

product string

[2]

serial number string

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Table 23: Standard USB requests

bmRequestType

Request

byte 0 (bits 7 to 0)

…continued

bRequest byte 1 (hex)

wValue bytes 2, 3 (hex)

wIndex bytes 4, 5 (hex)

wLength bytes 6, 7 (hex)

Data response

Feature

Clear Device Feature

0000 0000 01 01, 00 00, 00 00, 00 none

(Remote_ Wakeup) Clear Endpoint (1)

0000 0010 01 00, 00 81, 00 00, 00 none

Feature (Halt/Stall) Set Device Feature

0000 0000 03 01, 00 00, 00 00, 00 none

(Remote_ Wakeup) Set Endpoint (1)

0000 0010 03 00, 00 81, 00 00, 00 none

Feature (Halt/Stall)

Status

Get Device Status 1000 0000 00 00, 00 00, 00 02, 00 device status Get Interface Status 1000 0001 00 00, 00 00, 00 02, 00 zero

[3]

Get Endpoint (0) Status 1000 0010 00 00, 00 00/80, 00

02, 00 endpoint 0 status

Get Endpoint (1) Status 1000 0010 00 00, 00 81, 00 02, 00 endpoint 1 status

[1] Device address: 0 to 127. [2] Returned value in bytes. [3] MSB speciﬁes endpoint direction: 0 = OUT, 1= IN. The ISP1521 accepts either value.

12.2 Hub class requests

Table 24 shows the hub class requests.

Table 24: Hub class requests

bmRequestType

Request

byte 0 (bits 7 to 0)

Descriptor

Get Hub Descriptor 1010 0000 06 descriptortype

Feature

Clear Hub Feature

0010 0000 01 00, 00 00, 00 00, 00 none

(C_LOCAL_POWER) Clear Port Feature 0010 0011 01 feature Set Port Feature 0010 0011 03 feature

Status

Get Hub Status 1010 0000 00 00, 00 00, 00 04, 00 hub status and

Get Port Status 1010 0011 00 00, 00 port

ClearTTBuffer 0010 0011 08 Dev_Addr,

ResetTT 0010 0000 09 00, 00 01, 00 00, 00 none

bRequest byte 1 (hex)

wValue bytes 2, 3 (hex)

and index

[3] [3]

EP_nr

wIndex bytes 4, 5 (hex)

00, 00 length

, 00 port , 00 port

01, 00 00, 00 none

wLength bytes 6, 7

Data

(hex)

[2]

[4]

, 00 00, 00 none

[4]

, 00 00, 00 none

descriptor

change status

[4]

, 00 04, 00 port status and

change status

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ISP1521

Hi-Speed USB hub controller

Table 24: Hub class requests

Request

GetTTState 1010 0011 10 TT-ﬂags 01, 00 -

…continued

bmRequestType byte 0 (bits 7 to 0)

bRequest byte 1 (hex)

wValue bytes 2, 3 (hex)

wIndex bytes 4, 5 (hex)

wLength bytes 6, 7 (hex)

[1]

Data

TT state

StopTT 0010 0011 11 00, 00 01, 00 00, 00 none

Test modes

[4]

Test_J 0010 0011 03 15, 00 port Test_K 0010 0011 03 15, 00 port Test_SE0_NAK 0010 0011 03 15, 00 port Test_Packet 0010 0011 03 15, 00 port Test_Force_Enable 0010 0011 03 15, 00 port

[1] Returns vendor-speciﬁc data. [2] Returned value in bytes. [3] Feature selector value; see Table 25. [4] Downstream port identiﬁer: 1 to N with N is number of enabled ports (2 to 7).

, 01 00, 00 none

[4]

, 02 00, 00 none

[4]

, 03 00, 00 none

[4]

, 04 00, 00 none

[4]

, 05 00, 00 none

Table 25: Hub class feature selector

Feature selector name Recipient Value

C_HUB_LOCAL_POWER hub 00 C_HUB_OVER_CURRENT hub 01 PORT_CONNECTION port 00 PORT_ENABLE port 01 PORT_SUSPEND port 02 PORT_OVER_CURRENT port 03 PORT_RESET port 04 PORT_POWER port 08 PORT_LOW_SPEED port 09 C_PORT_CONNECTION port 16 C_PORT_ENABLE port 17 C_PORT_SUSPEND port 18 C_PORT_OVER_CURRENT port 19 C_PORT_RESET port 20 PORT_TEST port 21 PORT_INDICATOR port 22

12.3 Detailed responses to hub requests

12.3.1 Get conﬁguration

This request returns the conﬁguration value of the device. This request returns one byte of data; see Table 26.

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Table 26: Get hub conﬁguration response

Bit Function Value Description

0 conﬁguration value 0 device is not conﬁgured

1 to 7 reserved 0 -

12.3.2 Get device status

This request returns two bytes of data; see Table 27.

Table 27: Get device status response

Bit Function Value Description

0 self-powered 1 self-powered 1 remote wake-up 0 disabled

2 to 15 reserved 0 -

12.3.3 Get interface status

The request returns two bytes of data; see Table 28.

ISP1521

Hi-Speed USB hub controller

1 device is conﬁgured

1 enabled

Table 28: Get interface status response

Bit Function Value Description

0 to 15 reserved 0 -

12.3.4 Get endpoint status

The request returns two bytes of data; see Table 29.

Table 29: Get endpoint status response

Bit Function Value Description

0 halt 0 endpoint is not halted

1 to 15 reserved 0 -

12.3.5 Get hub status

The request returns four bytes of data; see Table 30.

Table 30: Get hub status response

Bit Function Value Description

0 local power source 0 local power supply good

1 overcurrent indicator 0 no overcurrent condition currently exists

2 to 15 reserved 0 16 local power status change 0 no change in the local power status

1 endpoint is halted

1 local power supply lost (inactive)

1 a hub overcurrent condition exists

1 local power status has changed

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Hi-Speed USB hub controller

Table 30: Get hub status response

Bit Function Value Description

17 overcurrent indicator change 0 no change in overcurrent

18 to 31 reserved 0 -

12.3.6 Get port status

This request returns four bytes of data. The ﬁrst word contains the port status bits (wPortStatus), and the next word contains the port status change bits (wPortChange). The contents of wPortStatus is given in Table 31, and the contents of wPortChange is given in Table 32.

Table 31: Get port status response (wPortStatus)

Bit Function Value Description

0 current connect status 0 no device is present

1 port enabled or disabled 0 port is disabled

2 suspend 0 port is not suspended

3 overcurrent indicator 0 no overcurrent condition exists

4 reset 0 reset signaling is not asserted

5 to 7 reserved 0 8 port power 0 port is in the powered-off state

9 low-speed device attached 0 full-speed or high-speed device is

10 high-speed device attached 0 full-speed device is attached

11 port test mode 0 not in the port test mode

12 port indicator control 0 displays default colors

13 to 15 reserved 0 -

…continued

1 overcurrent status has changed

1 a device is present on this port

1 port is enabled

1 port is suspended

1 an overcurrent condition exists

1 reset signaling is asserted

1 port is not in the powered-off state

attached

1 low-speed device is attached

1 high-speed device is attached

1 in the port test mode

1 displays software controlled color

Table 32: Get port status change response (wPortChange)

Bit Function Value Description

0 connect status change 0 no change in the current connect status

1 change in the current connect status

1 port enable or disable change 0 port is enabled

1 port is disabled

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Product data Rev. 03 — 24 November 2004 32 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Table 32: Get port status change response (wPortChange)

Bit Function Value Description

2 suspend change 0 no change

1 resume complete

3 overcurrent indicator change 0 no change in the overcurrent indicator

1 change in the overcurrent indicator

4 reset change 0 no change

1 reset complete

5 to 15 reserved 0 -

12.4 Various get descriptors

bmRequestType — 10000000B bmRequest — GET_DESCRIPTOR = 6

Table 33: Get descriptor request

Request name wValue wIndex Data

Descriptor index Descriptor type Zero/Language ID

Get device descriptor

Get conﬁguration descriptor

Get language ID string descriptor

Get manufacturer string descriptor

Get product string descriptor

Get serial number string descriptor

00 01 0 device descriptor

00 02 0 conﬁguration interface and

endpoint descriptors

00 03 0 language ID support string

01 03 n manufacturer string in LANGID n

02 03 n product string in LANGID n

03 03 n serial number string in LANGID n

…continued

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Product data Rev. 03 — 24 November 2004 33 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

13. Limiting values

Table 34: Absolute maximum ratings

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol Parameter Conditions Min Max Unit

REF(5V0)

I(5V0)

I(3V3)

O(3V3)

esd

stg

supply voltage 3.3 V −0.5 +4.6 V input reference voltage 5.0 V −0.5 +6.0 V input voltage on 5 V buffers 3.0 V < VCC< 3.6 V

[1]

−0.5 +6.0 V input voltage on 3.3 V buffers 3.0 V < VCC< 3.6 V −0.5 +4.6 V output voltage on 3.3 V buffers −0.5 +4.6 V latch-up current VI< 0 or VI>V

electrostatic discharge voltage on pins DM1 to DM7, DP1 to DP7,

- 100 mA

[2][3]

−4000 +4000 V

OC1_N to OC7_N, and all V

on all other pins; I

and GND pins; ILI<1µA

REF(5V0)

<1µA

[2][3]

−2000 +2000 V storage temperature −40 +125 °C

[1] Valid only when supply voltage is present. [2] Test method available on request. [3] Equivalent to discharging a 100 pF capacitor via a 1.5 kΩ resistor (Human Body Model).

14. Recommended operating conditions

Table 35: Recommended operating ranges

Symbol Parameter Min Typ Max Unit

REF(5V0)

I(3V3)

I(5V0)

amb

[1] All internal pull-up resistors are connected to this voltage.

supply voltage 3.3 V 3.0 3.3 3.6 V input reference voltage 5.0 V input voltage on 3.3 V pins 0 - V input voltage on 5 V tolerant pins 0 - V

[1]

4.5 5.0 5.5 V

CC REF(5V0)

V V

ambient temperature −40 - +70 °C

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Product data Rev. 03 — 24 November 2004 34 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

15. Static characteristics

Table 36: Static characteristics: supply pins

VCC= 3.0 V to 3.6 V; T

Symbol Parameter Conditions Min Typ Max Unit

Full-speed

REF(5V0)

CC(tot)

supply current 5 V - 0.5 - mA total supply current 3.3 V I

High-speed

CC(tot)

total supply current 3.3 V suspend mode; internal clock stopped

=−40°Cto+70°C; unless otherwise speciﬁed.

amb

CC(tot)=ICC1+ICC2+ICC3+ICC4

no device connected - 183 - mA 1 active device connected - 231 - mA 2 active devices connected - 276 - mA 3 active devices connected - 318 - mA 4 active devices connected - 362 - mA 5 active devices connected - 400 - mA 6 active devices connected - 446 - mA 7 active devices connected - 492 - mA

[1]

-91-mA

[2]

- 0.5 - mA

[1] Irrespective of the number of devices connected, the value of ICC is always 91 mA in full-speed. [2] Including Rpu drop current.

Table 37: Static characteristics: digital input and outputs

VCC= 3.0 V to 3.6 V; T

=−40°Cto+70°C; unless otherwise speciﬁed.

amb

[1]

Symbol Parameter Conditions Min Typ Max Unit

Digital input pins

LOW-level input voltage - - 0.8 V HIGH-level input voltage 2.0 - - V input leakage current −1- +1µA

Schmitt-trigger input pins

V V V

th(LH) th(HL) hys

positive-going threshold voltage 1.4 - 1.9 V negative-going threshold voltage 0.9 - 1.5 V hysteresis voltage 0.4 - 0.7 V

Overcurrent detection pins OC1_N to OC7_N

∆V

trip

overcurrent detection trip voltage ∆V=VCC− V

OCn_N

-84-mV

Digital output pins

LOW-level output voltage - - 0.4 V HIGH-level output voltage 2.4 - - V

Open-drain output pins

OFF-state output current −1- +1µA

[1] All pins are 5 V tolerant.

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Product data Rev. 03 — 24 November 2004 35 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Table 38: Static characteristics: I2C-bus interface block

VCC= 3.0 V to 3.6 V; T

Symbol Parameter Conditions Min Typ Max Unit

Input pin SCL and input/output pin SDA

hys

[1] All pins are 5 V tolerant. [2] The bus capacitance (Cb) is speciﬁed in pF. To meet the speciﬁcation for VOL and the maximum rise time (300 ns), use an external

LOW-level input voltage - - 0.9 V HIGH-level input voltage 2.1 - - V hysteresis voltage 0.15 - - V LOW-level output voltage - - 0.4 V output fall time VIH to V

pull-up resistor with R

Table 39: Static characteristics: USB interface block (DP0 to DP7 and DM0 to DM7)

VCC= 3.0 V to 3.6 V; T

Symbol Parameter Conditions Min Typ Max Unit

Input levels for high-speed

HSSQ

squelch detection threshold (differential signal amplitude)

HSCM

data signaling common-mode voltage range

Output levels for high-speed

HSOI

HSOH

HSOL

CHIRPJ

CHIRPK

idle state −10 - +10 mV data signaling HIGH 360 - 440 mV data signaling LOW −10 - +10 mV chirp J level (differential voltage) chirp K level (differential voltage)

Input levels for full-speed and low-speed

IHZ

LOW-level input voltage - - 0.8 V HIGH-level input voltage (drive) 2.0 - - V HIGH-level input voltage (ﬂoating) 2.7 - 3.6 V differential input sensitivity |DP − DM| 0.2 - - V differential common-mode range 0.8 - 2.5 V

Output levels for full-speed and low-speed

V V V

OL OH CRS

LOW-level output voltage 0 - 0.3 V HIGH-level output voltage 2.8 - 3.6 V output signal crossover point

voltage

Leakage current

OFF-state leakage current −1- +1µA

Capacitance

transceiver capacitance pin to GND - - 20 pF

=−40°Cto+70°C; unless otherwise speciﬁed.

amb

[1]

= 850/CbkΩ and R

max

=−40°Cto+70°C; unless otherwise speciﬁed.

amb

10<Cb=10pFto400pF

=(VCC− 0.4)/3 kΩ.

min

squelch detected - - 100 mV no squelch detected 150 - - mV

[2]

- 0 250 ns

−50 - +500 mV

[1]

700 - 1100 mV

[1]

−900 - −500 mV

[2]

1.3 - 2.0 V

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Product data Rev. 03 — 24 November 2004 36 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Table 39: Static characteristics: USB interface block (DP0 to DP7 and DM0 to DM7)

VCC= 3.0 V to 3.6 V; T

=−40°Cto+70°C; unless otherwise speciﬁed.

amb

…continued

Symbol Parameter Conditions Min Typ Max Unit

Resistance

INP

input impedance 10 - - MΩ

Termination

TERM

termination voltage for pull-up

[3]

3.0 - 3.6 V

resistor on pin RPU

[1] For minimum value, the HS termination resistor is disabled and the pull-up resistor is connected. Only during reset, when both the hub

and the device are capable of high-speed operation. [2] Characterized only, not tested. Limits guaranteed by design. [3] In the suspend mode, the minimum voltage is 2.7 V.

9397 750 13702

Product data Rev. 03 — 24 November 2004 37 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

16. Dynamic characteristics

Table 40: Dynamic characteristics: system clock timing

Symbol Parameter Conditions Min Typ Max Unit

Reset

W(POR)

internal power-on reset pulse width

W(RESET_N)

pulse width on pin RESET_N 0.2 - - µs

Crystal oscillator

clk

clock frequency crystal

External clock input

δ clock duty cycle - 50 - %

[1] Recommended accuracy of the clock frequency is 500 ppm for the crystal. [2] Suggested values for external capacitors when using a crystal are 22 pF to 27 pF.

Table 41: Dynamic characteristics: overcurrent sense timing

VCC= 3.0 V to 3.6 V; T

=−40°Cto+70°C; unless otherwise speciﬁed.

amb

Symbol Parameter Conditions Min Typ Max Unit

Overcurrent sense pins OC1_N to OC7_N

trip

overcurrent trip response time from

see Figure 9

OCn_N LOW to PSWn_N HIGH

0.2 - 1 µs

[1][2]

- 12 - MHz

--15ms

∆V

overcurrent

input

0 V

power switch

output

0 V

Overcurrent input: pins OCn_N; power switch output: pins PSWn_N.

trip

mbl032

Fig 9. Overcurrent trip response timing.

Table 42: Dynamic characteristics: digital pins

VCC= 3.0 V to 3.6 V; T

=−40°Cto+70°C; unless otherwise speciﬁed.

amb

[1]

Symbol Parameter Conditions Min Typ Max Unit

t(HL)

t(LH)

[1] All pins are 5 V tolerant.

output transition time 4 - 15 ns

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Product data Rev. 03 — 24 November 2004 38 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Table 43: Dynamic characteristics: high-speed source electrical characteristics

VCC= 3.0 V to 3.6 V; T

Symbol Parameter Conditions Min Typ Max Unit

Driver characteristics

HSR

HSF

rise time 10 % to 90 % 500 - - ps fall time 90 % to 10 % 500 - - ps

Clock timing

HSDRAT

HSFRAM

HSRFI

data rate 479.76 - 480.24 Mbit/s microframe interval 124.9375 - 125.0625 µs consecutive microframe interval

difference

Table 44: Dynamic characteristics: full-speed source electrical characteristics

VCC= 3.0 V to 3.6 V; T

Symbol Parameter Conditions Min Typ Max Unit

Driver characteristics

FRFM

rise time CL= 50 pF; 10 % to 90 % of

fall time CL= 50 pF; 90 % to 10 % of

differential rise and fall time matching

DRV

CRS

driver output resistance for the driver that is not

output signal crossover voltage

Data source timing

DJ1

source differential jitter for consecutive transitions

DJ2

source differential jitter for paired transitions

FEOPT

FDEOP

source SE0 interval of EOP see Figure 11 160 - 175 ns source differential data-to-EOP

transition skew

Receiver timing

JR1

[2]

receiver data jitter tolerance for consecutive transitions

JR2

receiver data jitter tolerance for paired transitions

FEOPR

FST

receiver SE0 width accepted as EOP; see

width of SE0 interval during differential transaction

Hub timing (downstream ports conﬁgured as full-speed)

FHDD

hub differential data delay (without cable)

=−40°Cto+70°C; test circuit Figure 21; unless otherwise speciﬁed.

amb

1 - four high-speed

=−40°Cto+70°C; test circuit Figure 22; unless otherwise speciﬁed.

amb

− VOL|

high-speed capable

[2]

see Figure 10

see Figure 11 −2 - +5 ns

see Figure 12 −18.5 - +18.5 ns

see Figure 12 −9 - +9 ns

Figure 11

rejected as EOP; see Figure 13 --14ns

[2]

see Figure 14; CL=0pF --44ns

bit times

4 - 20 ns

[1]

90 - 111.1 %

28 - 44 Ω

[1][2]

1.3 - 2.0 V

[1]

−3.5 - +3.5 ns

[1]

−4 - +4 ns

82--ns

9397 750 13702

Product data Rev. 03 — 24 November 2004 39 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Table 44: Dynamic characteristics: full-speed source electrical characteristics

VCC= 3.0 V to 3.6 V; T

=−40°Cto+70°C; test circuit Figure 22; unless otherwise speciﬁed.

amb

…continued

Symbol Parameter Conditions Min Typ Max Unit

FSOP

FEOPD

FHESK

[1] Excluding the ﬁrst transition from idle state. [2] Characterized only, not tested. Limits guaranteed by design.

data bit width distortion after SOP see Figure 14 −5 - +5 ns hub EOP delay relative to t

HDD

see Figure 15 0 - 15 ns

hub EOP output width skew see Figure 15 −15 - +15 ns

Table 45: Dynamic characteristics: low-speed source electrical characteristics

VCC= 3.0 V to 3.6 V; T

=−40°Cto+70°C; test circuit Figure 22; unless otherwise speciﬁed.

amb

Symbol Parameter Conditions Min Typ Max Unit

Driver characteristics

LRFM

rise time 75 - 300 ns fall time 75 - 300 ns differential rise and fall time

[1]

80 - 125 %

matching

CRS

output signal crossover voltage

[1][2]

1.3 - 2.0 V

Hub timing (downstream ports conﬁgured as full-speed)

LHDD

LSOP

LEOPD

LHESK

hub differential data delay see Figure 14 - - 300 ns data bit width distortion after SOP see Figure 14 hub EOP delay relative to t

HDD

see Figure 15

hub EOP output width skew see Figure 15

[2]

−60 - +60 ns

[2]

0 - 200 ns

[2]

−300 - +300 ns

[1] Excluding the ﬁrst transition from idle state. [2] Characterized only, not tested. Limits guaranteed by design.

PERIOD

+3.3 V

differential data lines

0 V

is the bit duration corresponding with the USB data rate.

PERIOD

crossover point

N × T

consecutive

transitions

+ t

PERIOD

DJ1

N × T

Fig 10. Source differential data jitter.

paired

transitions

PERIOD

crossover point crossover point

+ t

DJ2

mgr870

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Product data Rev. 03 — 24 November 2004 40 of 53

Philips Semiconductors

PERIOD

+3.3 V

differential

data lines

0 V

is the bit duration corresponding with the USB data rate.

PERIOD

crossover point

differential data to

SE0/EOP skew

N × T

PERIOD

+ t

DEOP

Full-speed timing symbols have a subscript preﬁx ‘F’, low-speed timing a preﬁx ‘L’.

Fig 11. Source differential data-to-EOP transition skew and EOP width.

PERIOD

+3.3 V

crossover point

extended

ISP1521

Hi-Speed USB hub controller

source EOP width: t receiver EOP width: t

EOPT

EOPR

mgr776

differential data lines

0 V

is the bit duration corresponding with the USB data rate.

PERIOD

N × T

tJR is the jitter reference point.

Fig 12. Receiver differential data jitter.

Fig 13. Receiver SE0 width tolerance.

consecutive

transitions

+ t

PERIOD

JR1

N × T

differential data lines

paired

transitions

PERIOD

+3.3 V

0 V

+ t

JR2

JR1

FST

IH(min)

mgr872

JR2

mgr871

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Product data Rev. 03 — 24 November 2004 41 of 53

Philips Semiconductors

+3.3 V

upstream

differential

data lines

crossover

point

downstream

differential

data

ISP1521

Hi-Speed USB hub controller

crossover

point

0 V

+3.3 V

downstream

differential

data lines

0 V

SOP distortion: t

= t

SOP

HDD (next J)

(A) downstream hub delay (B) upstream hub delay

downstream

− t

HDD(SOP)

hub delay

HDD

crossover

point

upstream

differential

Full-speed timing symbols have a subscript preﬁx ‘F’, low-speed timing a preﬁx ‘L’.

Fig 14. Hub differential data delay and SOP distortion.

+3.3 V

EOP+

crossover

point

extended

crossover

point

extended

downstream

port

upstream

end of cable

upstream

differential

data lines

0 V

+3.3 V

downstream

differential

data lines

EOP−

data

hub delay upstream

HDD

EOP−

EOP+

crossover

point

mgr777

crossover

point

extended

crossover

point

extended

0 V

EOP delay:

= max (t

EOP

EOP delay relative to t

EOPD

EOP skew:

HESK

= t

EOP−

− t

= t

EOP

− t

EOP+

(A) downstream EOP delay (B) upstream EOP delay

, t

)

EOP+

HDD

EOP−

mgr778

Full-speed timing symbols have a subscript preﬁx ‘F’, low-speed timing a preﬁx ‘L’.

Fig 15. Hub EOP delay and EOP skew.

9397 750 13702

Product data Rev. 03 — 24 November 2004 42 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Table 46: Dynamic characteristics: I2C-bus (pins SDA and SCL)

VCC and T

Symbol Parameter Conditions Min Typ Max Unit

Clock frequency

SCL

General timing

LOW

HIGH

SDA timing

BUF

SU;STA

HD;STA

SU;DAT

HD;DAT

SU;STO

Additional I

VD;DAT

within recommended operating range; VDD=5V; VSS=V

amb

SCL clock frequency f

XTAL

=12MHz

; VIL and VIH between VSS and VDD.

GND

[1]

0 93.75 100 kHz

SCL LOW time 4.7 - - µs SCL HIGH time 4.0 - - µs SCL and SDA rise time

[2]

- - 1000 ns SCL and SDA fall time - - 300 ns capacitive load for each bus line - - 400 pF

bus free time 4.7 - - µs set-up time for (repeated) START

4.7 - - µs condition

hold time (repeated) START condition 4.0 - - µs data set-up time 250 - - ns data hold time 0 - - µs set-up time for STOP condition 4.0 - - µs

C-bus timing

SCL LOW to data-out valid time - - 0.4 µs

[1] f

SCL

=1⁄64× f

XTAL

[2] Rise time is determined by Cb and pull-up resistor value Rp (typical 4.7 kΩ).

SDA

HIGHtLOW

SCL

BUF

S Sr

HD;STA

SU;DAT

HD;DAT

Fig 16. I2C-bus timing.

SU;STA

SU;STO

004aaa485

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Product data Rev. 03 — 24 November 2004 43 of 53

Philips Semiconductors

17. Application information

17.1 Descriptor conﬁguration selection

ISP1521

Hi-Speed USB hub controller

upstream

facing port

The I2C-bus cannot be shared between the EEPROM and the external microcontroller; see Table 11. (1) The function on port 7, which is a non-removable port, is optional.

GoodLink

green and

amber LEDs,

port 1

ISP1521

. .

7 USB downstream facing ports

ROM

green and

amber LEDs,

port 7(

I2C-bus

external microcontroller

acting as I

C-bus master

USB function

Fig 17. Descriptors conﬁguration selection application diagram.

17.2 Overcurrent detection limit adjustment

For an overcurrent limit of 500 mA per port, a PMOS with R 100 mΩ is required. If a PMOS with a lower R detection can be adjusted by using a series resistor; see Figure 18.

DSON

EEPROM

004aaa302

of approximately

DSON

is used, analog overcurrent

∆V

= ∆V

PMOS

∆V I

OC(nom)

= voltage drop on PMOS

PMOS

= 0.6 µA.

(1) Rtd is optional.

trip

= ∆V

trip(intrinsic)

5 V

− (I

OC(nom)

REF(5V0)

ISP1521

× Rtd), where:

OCn_NPSWn_N

004aaa260

(1)

Fig 18. Adjusting analog overcurrent detection limit (optional).

9397 750 13702

Product data Rev. 03 — 24 November 2004 44 of 53

Philips Semiconductors

17.3 Self-powered hub conﬁgurations

5 V ± 3 %

POWER SUPPLY

−

ISP1521

Hi-Speed USB hub controller

+4.85 V (min)

3.3 V or 5.0 V

(5V0)

REF

GND

TEST_LOW

TEST_HIGH

ADOC

3.3 V LDO VOLT AGE

REGULA T OR

ISP1521

PSW1_N

OC1_N

PSW2_N OC2_N

PSW3_N

OC3_N

PSW4_N OC4_N

PSW5_N

OC5_N

PSW6_N

OC6_N

PSW7_N

OC7_N

0.1 µF

47 kΩ

0.1 µF

47 kΩ

ferrite bead

120 µF

ferrite bead

120 µF

+4.75 V

(min)

+4.75 V

(min)

downstream

port connector

BUS

D+ D− GND SHIELD

port 2

port 6

BUS

D+ D− GND SHIELD

004aaa304

Fig 19. Self-powered hub; individual port power switching; individual overcurrent

detection.

9397 750 13702

Product data Rev. 03 — 24 November 2004 45 of 53

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

3.3 V or 5.0 V

REF(5V0)

GND

TEST_LOW

TEST_HIGH

ADOC

5.1 V ± 3 %

POWER SUPPLY

(kick-up)

3.3 V LDO VOLT AGE

REGULA T OR

ISP1521

004aaa306

+4.95 V (min)

−

OC1_N

PSW1_N PSW2_N PSW3_N PSW4_N PSW5_N PSW6_N PSW7_N

OC2_N OC3_N OC4_N OC5_N OC6_N OC7_N

0.1 µF

47 kΩ

+ 5 V

low-ohmic sense resistor for overcurrent detection

ferrite bead

120 µF

ferrite bead

120 µF

+4.75 V

(min)

+4.75 V

(min)

downstream

port connector

BUS

D+ D− GND SHIELD

port 2

port 6

BUS

D+ D− GND SHIELD

Fig 20. Self-powered hub; ganged port power switching; global overcurrent

detection.

9397 750 13702

Product data Rev. 03 — 24 November 2004 46 of 53

Philips Semiconductors

18. Test information

Fig 21. High-speed transmitter and receiver test circuit.

ISP1521

Hi-Speed USB hub controller

DPn

DUT

DMn GND

143 Ω

(1) Transmitter: connected to 50 Ω inputs of a high-speed differential oscilloscope.

Receiver: connected to 50 Ω outputs of a high-speed differential data generator.

3.3 V

15.8 Ω

143 Ω

50 Ω coax

D+

(1)

D−

mdb273

full-

speed

(1)

DUT

(1) CL= 50 pF for full-speed.

Fig 22. Full-speed test circuit.

RPU

DPn

DMn

1.5 kΩ ± 5%

(1)

test point

15 kΩ

test point

15 kΩ

mdb274

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Product data Rev. 03 — 24 November 2004 47 of 53

Philips Semiconductors

19. Package outline

ISP1521

Hi-Speed USB hub controller

LQFP80: plastic low profile quad flat package; 80 leads; body 12 x 12 x 1.4 mm

60 41

pin 1 index

w M

v M

detail X

SOT315-1

(A )

0 5 10 mm

scale

DIMENSIONS (mm are the original dimensions)

UNIT

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

OUTLINE VERSION

SOT315-1 136E15 MS-026

A1A2A3b

max.

0.16

1.6

0.04

1.5

1.3

0.27

0.13

0.18

0.12

0.25

IEC JEDEC JEITA

(1)

(1) (1)(1)

12.1

11.9

REFERENCES

eHELL

12.1

11.9

0.5

14.15

13.85

14.15

13.85

0.75

0.30

0.15 0.10.21

EUROPEAN

PROJECTION

1.45

1.05

Zywv θ

1.45

1.05

ISSUE DATE

00-01-19 03-02-25

Fig 23. LQFP80 package outline.

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Product data Rev. 03 — 24 November 2004 48 of 53

Philips Semiconductors

20. Soldering

20.1 Introduction to soldering surface mount packages

This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our

Packages

There is no soldering method that is ideal for all surface mount IC packages. Wave soldering can still be used for certain surface mount ICs, but it is not suitable for ﬁne pitch SMDs. In these situations reﬂow soldering is recommended. In these situations reﬂow soldering is recommended.

20.2 Reﬂow soldering

Reﬂow soldering requires solder paste (a suspension of ﬁne solder particles, ﬂux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Driven by legislation and environmental forces the worldwide use of lead-free solder pastes is increasing.

ISP1521

Hi-Speed USB hub controller

Data Handbook IC26; Integrated Circuit

(document order number 9398 652 90011).

Several methods exist for reﬂowing; for example, convection or convection/infrared heating in a conveyor type oven. Throughput times (preheating, soldering and cooling) vary between 100 and 200 seconds depending on heating method.

Typical reﬂow peak temperatures range from 215 to 270 °C depending on solder paste material. The top-surface temperature of the packages should preferably be kept:

• below 225 °C (SnPb process) or below 245 °C (Pb-free process)

– for all BGA, HTSSON..T and SSOP..T packages – for packages with a thickness ≥ 2.5 mm – for packages with a thickness < 2.5 mm and a volume ≥ 350 mm3 so called

thick/large packages.

• below 240 °C (SnPb process) or below 260 °C (Pb-free process) for packages with

a thickness < 2.5 mm and a volume < 350 mm3 so called small/thin packages.

Moisture sensitivity precautions, as indicated on packing, must be respected at all times.

20.3 Wave soldering

Conventional single wave soldering is not recommended for surface mount devices (SMDs) or printed-circuit boards with a high component density, as solder bridging and non-wetting can present major problems.

To overcome these problems the double-wave soldering method was speciﬁcally developed.

If wave soldering is used the following conditions must be observed for optimal results:

• Use a double-wave soldering method comprising a turbulent wave with high

upward pressure followed by a smooth laminar wave.

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Product data Rev. 03 — 24 November 2004 49 of 53

Philips Semiconductors

• For packages with leads on two sides and a pitch (e):

• For packages with leads on four sides, the footprint must be placed at a 45° angle

During placement and before soldering, the package must be ﬁxed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured.

Typical dwell time of the leads in the wave ranges from 3 to 4 seconds at 250 °C or 265 °C, depending on solder material applied, SnPb or Pb-free respectively.

A mildly-activated ﬂux will eliminate the need for removal of corrosive residues in most applications.

ISP1521

Hi-Speed USB hub controller

– larger than or equal to 1.27 mm, the footprint longitudinal axis ispreferred to be

parallel to the transport direction of the printed-circuit board;

– smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the

transport direction of the printed-circuit board.

The footprint must incorporate solder thieves at the downstream end.

to the transport direction of the printed-circuit board. The footprint must incorporate solder thieves downstream and at the side corners.

20.4 Manual soldering

Fix the component by ﬁrst soldering two diagonally-opposite end leads. Use a low voltage (24 V or less) soldering iron applied to the ﬂat part of the lead. Contact time must be limited to 10 seconds at up to 300 °C.

When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 °C.

20.5 Package related soldering information

Table 47: Suitability of surface mount IC packages for wave and reﬂow soldering

methods

Package

BGA, HTSSON..T SSOP..T

DHVQFN, HBCC,HBGA,HLQFP,HSO, HSOP, HSQFP, HSSON, HTQFP, HTSSOP, HVQFN, HVSON, SMS

PLCC LQFP, QFP, TQFP not recommended SSOP, TSSOP, VSO, VSSOP not recommended CWQCCN..L

[1]

[3]

, TFBGA, USON, VFBGA

[5]

, SO, SOJ suitable suitable

, LBGA, LFBGA, SQFP,

[8]

, PMFP

[9]

, WQCCN..L

[8]

Soldering method Wave Reﬂow

not suitable suitable

not suitable

not suitable not suitable

[2]

[4]

[5][6] [7]

suitable

suitable suitable

[1] For more detailed information on the BGA packages refer to the

(AN01026); order a copy from your Philips Semiconductors sales ofﬁce.

[2] All surfacemount (SMD) packages are moisture sensitive. Depending upon the moisture content, the

maximum temperature (with respect to time) and body sizeof the package, there is a risk that internal or external package cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). For details, refer to the Drypack information in the

Circuit Packages; Section: Packing Methods

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Product data Rev. 03 — 24 November 2004 50 of 53

(LF)BGA Application Note

Data Handbook IC26; Integrated

Philips Semiconductors

[3] These transparent plastic packages are extremely sensitive to reﬂow soldering conditions and must

[4] These packages are not suitable for wave soldering. On versions with the heatsink on the bottom

[5] If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave

[6] Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it

[7] Wave soldering is suitable for SSOP, TSSOP, VSO and VSOP packages with a pitch (e) equal to or

[8] Image sensor packagesin principle should not be soldered. Theyare mounted in sockets or delivered

[9] Hot bar soldering or manual soldering is suitable for PMFP packages.

21. Revision history

ISP1521

Hi-Speed USB hub controller

on no account be processed through more than one soldering cycle or subjected to infrared reﬂow soldering with peak temperature exceeding 217 °C ± 10 °C measured in the atmosphere of the reﬂow oven. The package body peak temperature must be kept as low as possible.

side, the solder cannot penetrate between the printed-circuit board and the heatsink. On versions with the heatsink on the top side, the solder might be deposited on the heatsink surface.

direction. The package footprint must incorporate solder thieves downstream and at the side corners.

is deﬁnitely not suitable for packages with a pitch (e) equal to or smaller than 0.65mm.

larger than 0.65 mm; it is deﬁnitely not suitable for packages with a pitch (e) equal to or smaller than

0.5 mm.

pre-mounted on ﬂex foil. However, the image sensor package can be mounted by the client on a ﬂex foil by using a hot bar soldering process. The appropriate soldering proﬁle can be provided on request.

Table 48: Revision history

Rev Date CPCN Description

03 20041124 200411024 Product data (9397 750 13702)

Modiﬁcations:

• Globally changed the temperature range from “0 °C to +70 °C” to “−40 °Cto+70°C”

• Globally changed the ADOC pin connection from “3.3 V” to “3.3 V or 5.0 V”

• Table 34 “Absolute maximum ratings”: changed the max value of V

5.25 V to 6.0 V

• Table 35 “Recommended operating ranges”: changed the max value of V

5.25 V to 5.5 V

• Figure 19 “Self-powered hub; individual port power switching; individual overcurrent

detection.”: changed pin SP/BP_N to TEST_HIGH and pin HP to TEST_LOW

• Figure 20 “Self-powered hub; ganged port power switching; global overcurrent

detection.”: changed pin SP/BP_N to TEST_HIGH and pin HP to TEST_LOW.

02 20040212 - Product data (9397 750 11691) 01 20030625 - Preliminary data (9397 750 10691)

REF(5V0)

from

REF(5V0)

from

9397 750 13702

Product data Rev. 03 — 24 November 2004 51 of 53

Philips Semiconductors

22. Data sheet status

ISP1521

Hi-Speed USB hub controller

Level Data sheet status

I Objective data Development This data sheet contains data from the objective speciﬁcation for product development. Philips

II Preliminary data Qualiﬁcation This data sheet contains data from the preliminary speciﬁcation. Supplementary data will be published

III Product data Production This data sheet contains data from the product speciﬁcation. Philips Semiconductors reserves the

[1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at

URL http://www.semiconductors.philips.com.

[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.

[1]

Product status

23. Deﬁnitions

Short-form speciﬁcation — The data in a short-form speciﬁcation is

extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook.

Limiting values deﬁnition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the speciﬁcation is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the speciﬁed use without further testing or modiﬁcation.

[2][3]

Deﬁnition

Semiconductors reserves the right to change the speciﬁcation in any manner without notice.

at a later date. Philips Semiconductors reserves the right to change the speciﬁcation without notice, in order to improve the design and supply the best possible product.

right to make changes at any time in order to improvethe design, manufacturing and supply. Relevant changes will be communicated via a Customer Product/Process Change Notiﬁcation (CPCN).

performance. When the product is in full production (status ‘Production’), relevant changes will be communicated via a Customer Product/Process Change Notiﬁcation (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise speciﬁed.

25. Licenses

Purchase of Philips I2C components

Purchase of Philips I under the Philips’ I

C system provided the system conforms to the I2C speciﬁcation deﬁned by Philips. This speciﬁcation can be ordered using the code 9398 393 40011.

C components conveys a license

C patent to use the components in the

24. Disclaimers

Life support — These products are not designed for use in life support

appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.

Right to make changes — Philips Semiconductors reserves the right to make changes in the products - including circuits, standard cells, and/or software - described or contained herein in order to improve design and/or

26. Trademarks

ACPI — is an open industry speciﬁcation for PC power management,

co-developed by Intel Corp., Microsoft Corp. and Toshiba.

GoodLink — is a trademark of Koninklijke Philips Electronics N.V.

C-bus — is a trademark of Koninklijke Philips Electronics N.V. OnNow — is a trademark of Microsoft Corporation. Intel — is a registered trademark of Intel Corporation.

Contact information

For additional information, please visit http://www.semiconductors.philips.com. For sales ofﬁce addresses, send e-mail to: sales.addresses@www.semiconductors.philips.com. Fax: +31 40 27 24825

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Product data Rev. 03 — 24 November 2004 52 of 53

Philips Semiconductors

Contents

ISP1521

Hi-Speed USB hub controller

1 General description. . . . . . . . . . . . . . . . . . . . . . 1

2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

4 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . 3

5 Ordering information. . . . . . . . . . . . . . . . . . . . . 3

6 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4

7 Pinning information. . . . . . . . . . . . . . . . . . . . . . 5

7.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

7.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5

8 Functional description . . . . . . . . . . . . . . . . . . 10

8.1 Analog transceivers . . . . . . . . . . . . . . . . . . . . 10

8.2 Hub controller core . . . . . . . . . . . . . . . . . . . . . 10

8.2.1 Philips serial interface engine. . . . . . . . . . . . . 10

8.2.2 Routing logic. . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.2.3 Transaction translator. . . . . . . . . . . . . . . . . . . 10

8.2.4 Mini-host controller. . . . . . . . . . . . . . . . . . . . . 10

8.2.5 Hub repeater. . . . . . . . . . . . . . . . . . . . . . . . . . 11

8.2.6 Hub and port controllers. . . . . . . . . . . . . . . . . 11

8.2.7 Bit clock recovery . . . . . . . . . . . . . . . . . . . . . . 11

8.3 Phase-locked loop clock multiplier . . . . . . . . . 11

8.4 I

C-bus controller . . . . . . . . . . . . . . . . . . . . . . 11

8.5 Overcurrent detection circuit. . . . . . . . . . . . . . 11

8.6 GoodLink . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

8.7 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 11

9 Conﬁguration selections. . . . . . . . . . . . . . . . . 13

9.1 Conﬁguration through I/O pins . . . . . . . . . . . . 14

9.1.1 Number of downstream facing ports. . . . . . . . 14

9.1.2 Power switching . . . . . . . . . . . . . . . . . . . . . . . 14

9.1.3 Overcurrent protection mode . . . . . . . . . . . . . 15

9.1.4 Non-removable port . . . . . . . . . . . . . . . . . . . . 16

9.1.5 Port indicator support . . . . . . . . . . . . . . . . . . . 16

9.2 Device descriptors and string descriptors settings using I

9.2.1 Background information on I

C-bus . . . . . . . . . . . . . . . . . . 17

C-bus . . . . . . . . 17

9.2.2 Architecture of conﬁgurable hub descriptors . 18

9.2.3 ROM or EEPROM map. . . . . . . . . . . . . . . . . . 19

9.2.4 ROM or EEPROM detailed map. . . . . . . . . . . 19

10 Hub controller description . . . . . . . . . . . . . . . 24

10.1 Endpoint 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

10.2 Endpoint 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

11 Descriptors. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

12 Hub requests . . . . . . . . . . . . . . . . . . . . . . . . . . 28

12.1 Standard USB requests . . . . . . . . . . . . . . . . . 28

12.2 Hub class requests. . . . . . . . . . . . . . . . . . . . . 29

12.3 Detailed responses to hub requests. . . . . . . . 30

12.3.1 Get conﬁguration . . . . . . . . . . . . . . . . . . . . . . 30

12.3.2 Get device status . . . . . . . . . . . . . . . . . . . . . . 31

12.3.3 Get interface status. . . . . . . . . . . . . . . . . . . . . 31

12.3.4 Get endpoint status . . . . . . . . . . . . . . . . . . . . 31

12.3.5 Get hub status . . . . . . . . . . . . . . . . . . . . . . . . 31

12.3.6 Get port status . . . . . . . . . . . . . . . . . . . . . . . . 32

12.4 Various get descriptors. . . . . . . . . . . . . . . . . . 33

13 Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 34

14 Recommended operating conditions . . . . . . 34

15 Static characteristics . . . . . . . . . . . . . . . . . . . 35

16 Dynamic characteristics. . . . . . . . . . . . . . . . . 38

17 Application information . . . . . . . . . . . . . . . . . 44

17.1 Descriptor conﬁguration selection . . . . . . . . . 44

17.2 Overcurrent detection limit adjustment. . . . . . 44

17.3 Self-powered hub conﬁgurations . . . . . . . . . . 45

18 Test information. . . . . . . . . . . . . . . . . . . . . . . . 47

19 Package outline. . . . . . . . . . . . . . . . . . . . . . . . 48

20 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

20.1 Introduction to soldering surface mount

packages. . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

20.2 Reﬂow soldering. . . . . . . . . . . . . . . . . . . . . . . 49

20.3 Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 49

20.4 Manual soldering . . . . . . . . . . . . . . . . . . . . . . 50

20.5 Package related soldering information. . . . . . 50

21 Revision history . . . . . . . . . . . . . . . . . . . . . . . 51

22 Data sheet status. . . . . . . . . . . . . . . . . . . . . . . 52

23 Deﬁnitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

24 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

25 Licenses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

26 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.

The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.

Date of release: 24 November 2004 Document order number: 9397 750 13702

Philips ISP1521 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1. General description

2. Features

3. Applications

4. Abbreviations

5. Ordering information

6. Block diagram

7. Pinning information

7.1 Pinning

7.2 Pin description

8. Functional description

8.1 Analog transceivers

8.2 Hub controller core

8.3 Phase-locked loop clock multiplier

8.4 I2C-bus controller

8.5 Overcurrent detection circuit

8.6 GoodLink

8.7 Power-on reset

9.2 Device descriptors and string descriptors settings using I2C-bus

10. Hub controller description

11. Descriptors

12. Hub requests

12.1 Standard USB requests

12.2 Hub class requests

12.3 Detailed responses to hub requests

12.4 Various get descriptors

13. Limiting values

14. Recommended operating conditions

15. Static characteristics

16. Dynamic characteristics

17. Application information

17.2 Overcurrent detection limit adjustment

18. Test information

19. Package outline

20. Soldering

20.1 Introduction to soldering surface mount packages

20.3 Wave soldering

20.4 Manual soldering

20.5 Package related soldering information

21. Revision history

22. Data sheet status

25. Licenses

24. Disclaimers

26. Trademarks