Philips PDIUSBH11NB, PDIUSBH11D Datasheet

INTEGRATED CIRCUITS

PDIUSBH11

Universal Serial Bus Hub

Product specification Supersedes data of 1997 Apr 17

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1997 Aug 01

Philips Semiconductors Product specification

PDIUSBH1 1Universal Serial Bus Hub

FEA TURES

•Complies with the Universal Serial Bus specification Rev. 1.0

•Four downstream ports with per packet connectivity

•Embedded function with two endpoints (control and interrupt)

•Integrated FIFO memory for hub and embedded function

•Automatic protocol handling

•Versatile I

C interface

•Allows software control of monitor

•Compliant with USB Human Interface and Display Device Class

•Single 3.3V supply with 5V tolerant I/O

DESCRIPTION

The Philips Semiconductors PDIUSBH1 1 is a compound USB hub IC (hub plus embedded function).

It is used in a microcontroller based system and communicates with the system microcontroller over the I approach to implementing a hub and embedded function allows the designer to maintain the system microcontroller of choice and retain existing architecture. This cuts down development time and offers the most cost-effective solution.

Ideal applications for the IC include computer monitors and keyboards.

The PDIUSBH11 conforms to the USB specification 1.0 and I serial interface specification. It is also compliant with the USB Human Input Device and Monitor Control Class specifications.

C serial bus. This modular

The embedded function of the PDIUSBH11 appears as PORT1 to the host system and the four downstream ports are numbered 2 through 5.

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. #

32-pin plastic SO 0°C to +70°C PDIUSBH11 D PDIUSBH11 D SOT287-1

32-pin plastic SDIP 0°C to +70°C PDIUSBH11 NB PDIUSBH11 NB SOT232-1

BLOCK DIAGRAM

UPSTREAM PORT

D+

ANALOG T

X/RX

D–

48 MHz

BIT CLOCK RECOVERY

INTEGRATED RAM

FULL SPEED

HUB

REPEATER

ANALOG T

X/RX

D–D+

DOWNSTREAM PORT 2

PORT CONTROL

LED ENABLE

ANALOG T

X/RX

D–D+

DOWNSTREAM PORT 3

PORT CONTROL

LED ENABLE

ANALOG T

X/RX

D–D+

DOWNSTREAM PORT 4

PORT CONTROL

LED ENABLE

ANALOG T

X/RX

DOWNSTREAM PORT 5

NOTE:

1. This is a conceptual block diagram and does not include each individual signal.

PHILIPS SIE

END OF

FRAME TIMERS

D–D+

PORT CONTROL

LED ENABLE

MEMORY MANAGEMENT UNIT

GENERAL PORT CONTROLLER

I SLAVE INTERFACE

INTERRUPT SDA SCL

SV00226

1997 Aug 01 853–1968 18238

Philips Semiconductors Product specification

HUB

PDIUSBH11Universal Serial Bus Hub

Analog Transceivers

These transceivers interface directly to the USB cables through some termination resistors. They are capable of transmitting and receiving serial data at both “full speed” (12 Mbit/s) and “low speed” (1.5 Mbit/s) data rates.

Hub Repeater

The hub repeater is responsible for managing connectivity on a per packet basis. It implements packet signaling connectivity and resume connectivity.

Low speed devices can be connected to downstream ports since the repeater will not propagate upstream packets to downstream ports, to which low speed devices are connected, unless they are preceded by a PREAMBLE PID.

End of Frame Timers

This block contains the specified EOF1 and EOF2 timers which are used to detect loss-of-activity and babble error conditions in the hub repeater. The timers also maintain the low-speed keep-alive strobe which is sent at the beginning of a frame.

General and Individual Port Controller

The general and individual port controllers together provide status and control of individual downstream ports. Via the I

C-interface a microcontroller can access the downstream ports and request or change the status of each individual port.

Any change in the status or settings of the individual port will result in an interrupt request. Via an interrupt register, the servicing microcontroller can look up the downstream port which generated

ENDPOINT DESCRIPTIONS

The following table summarizes the endpoints supported by the PDIUSBH11.

FUNCTION

EMBEDDED

ENDPOINT

NUMBER

ENDPOINT TYPE TRANSFER TYPE DIRECTION

0 Default Control IN, OUT 8 1 Status change Interrupt IN 1 0 Default Control IN, OUT 8 1 Interrupt Interrupt IN 8

the interrupt and request its new status. Any port status change can then be reported to the host via the hub status change (interrupt) endpoint.

Bit Clock Recovery

The bit clock recovery circuit recovers the clock from the incoming USB data stream using (4X) over-sampling principle. It is able to track jitter and frequency drift specified by the USB spec.

Philips Serial Interface Engine (PSIE)

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 / serial conversion, bit stuffing / destuffing, CRC checking / generation, PID verification / generation, address recognition, handshake evaluation / generation.

Memory Management Unit (MMU) and Integrated RAM

The MMU and the integrated RAM is used to handle the large difference in data-rate between USB, running in burst of 12 Mbit/s and the I This allows the microcontroller to read and write USB packets at its own (low) speed through I

This block implements the necessary I I microcontroller whenever the PDIUSBH11 needs attention. As a slave I

C interface to the microcontroller, running at 100 kbit/s.

C Slave Interface

C allows for simple micro-coding. An interrupt is used to alert the

C device, the PDIUSBH11 I2C clock: SCL is an input and is

C interface protocol. A slave

controlled by the microcontroller.

MAXIMUM PACKET SIZE

(bytes)

PIN DESCRIPTION

The PDIUSBH11 has two modes of operation. The first mode (Mode 0) enables the pins DNx_EN_N to power a LED indicating the port is enabled. The second mode (Mode 1) utilizes the LED enable pins as per port overcurrent condition pins.

1997 Aug 01

The voltage level at power up on the TEST1 and TEST2 pins determine the PDIUSBH1 1 mode of operation. When both of the pins are connected to Ground, Mode 0 is enabled. When pins TEST1 and TEST2 are connected to Vcc, Mode 1 is enabled. Note that in Mode 1 the pin DN2_EN_N remains an LED enable pin. Pin TEST3 should always be connected to Ground at all times.

Philips Semiconductors Product specification

PDIUSBH11Universal Serial Bus Hub

PIN DESCRIPTION (MODE 0)

PIN NO PIN SYMBOL I/O DRIVE NAME AND FUNCTION

1 TEST1 I Connect to Ground 2 TEST2 I Connect to Ground 3 TEST3 I Connect to Ground 4 RESET_N I ST Power-on reset 5 GND POWER Ground reference 6 XTAL1 I/O Crystal connection 1 (48MHz) 7 XTAL2 I/O Crystal connection 2 (48MHz) 8 CLK12MHZ O 2mA 12MHz output clock for external devices 9 V

10 OCURRENT_N I ST Over-current notice to the device

11 SWITCH_N O OD8 Enables power to downstream ports 12 SUSPEND O 4mA Device is in suspended state 13 DN2_EN_N O OD8 Downstream port 2 LED enable indicator 14 DN3_EN_N O OD8 Downstream port 3 LED enable indicator 15 DN4_EN_N O OD8 Downstream port 4 LED enable indicator 16 DN5_EN_N O OD8 Downstream port 5 LED enable indicator 17 INT_N O OD4 Connect to microcontroller interrupt 18 SDA I/O OD4 I2C bi-directional data 19 SCL I/O OD4 I2C bit-clock 20 GND POWER Ground reference 21 DN5_DP AI/O Downstream port 5 D+ connection 22 DN5_DM AI/O Downstream port 5 D– connection 23 DN4_DP AI/O Downstream port 4 D+ connection 24 DN4_DM AI/O Downstream port 4 D– connection 25 DN3_DP AI/O Downstream port 3 D+ connection 26 DN3_DM AI/O Downstream port 3 D– connection 27 DN2_DP AI/O Downstream port 2 D+ connection 28 DN2_DM AI/O Downstream port 2 D- connection 29 AGND POWER Analog Ground reference 30 AV 31 UP_DP AI/O Upstream D+ connection 32 UP_DM AI/O Upstream D- connection

POWER

Voltage supply 3.3V  0.3V

Analog voltage supply 3.3V  0.3V

1997 Aug 01

Philips Semiconductors Product specification

PDIUSBH11Universal Serial Bus Hub

PIN DESCRIPTION (MODE 1)

PIN NO PIN SYMBOL I/O DRIVE NAME AND FUNCTION

1 TEST1 I Connect to V 2 TEST2 I Connect to V 3 TEST3 I Connect to Ground 4 RESET_N I ST Power-on reset 5 GND POWER Ground reference 6 XTAL1 I/O Crystal connection 1 (48MHz) 7 XTAL2 I/O Crystal connection 2 (48MHz) 8 CLK12MHZ O 2mA 12MHz output clock for external devices 9 V

10 OCURRENT2_N I ST Downstream port 2 over-current notice

11 SWITCH_N O OD8 Enables power to downstream ports 12 SUSPEND O 4mA Device is in suspended state 13 DN2_EN_N O OD8 Downstream port 2 LED enable indicator 14 OCURRENT3_N I ST Downstream port 3 over-current notice 15 OCURRENT4_N I ST Downstream port 4 over-current notice 16 OCURRENT5_N I ST Downstream port 5 over-current notice 17 INT_N O OD4 Connect to microcontroller interrupt 18 SDA I/O OD4 I2C bi-directional data 19 SCL I/O OD4 I2C bit-clock 20 GND POWER Ground reference 21 DN5_DP AI/O Downstream port 5 D+ connection 22 DN5_DM AI/O Downstream port 5 D– connection 23 DN4_DP AI/O Downstream port 4 D+ connection 24 DN4_DM AI/O Downstream port 4 D- connection 25 DN3_DP AI/O Downstream port 3 D+ connection 26 DN3_DM AI/O Downstream port 3 D- connection 27 DN2_DP AI/O Downstream port 2 D+ connection 28 DN2_DM AI/O Downstream port 2 D- connection 29 AGND POWER Analog Ground reference 30 AV 31 UP_DP AI/O Upstream D+ connection 32 UP_DM AI/O Upstream D- connection

NOTES:

1. Signals ending in _N indicate active low signals. ST: Schmitt Trigger OD4, OD8: Open Drain with 4 or 8 mA drive AI/O: Analog I/O

POWER

Voltage supply 3.3V  0.3V

Analog voltage supply 3.3V  0.3V

CC CC

1997 Aug 01

Philips Semiconductors Product specification

PDIUSBH11Universal Serial Bus Hub

APPLICATION DIAGRAM

USB

3.3V

UPSTREAM

48MHz

12MHz

H11

USB

POWER SWITCH AND OVERCURRENT CIRCUIT

I2C Interface.

The I

C bus is used to interface to an external microcontroller

DOWNSTREAM

SWITCHED 5V

needed to control the operation of the hub. For cost consideration, the target system microcontroller can be shared and utilized for this purpose. The PDIUSBH11 implements a slave I

C interface. When the PDIUSBH11 needs to communicate with the microcontroller it asserts an interrupt signal. The microcontroller services this interrupt by reading the appropriate status register on the PDIUSBH11 through the I

C serial bus, refer to the I2C handbook, Philips order number 9397

C bus. (For more information about the

750 00013).

The I

C interface on the PDIUSBH11 defines two types of

transactions :

1. command transaction

A command transaction is used to define which data (e.g., status byte, buffer data, ...) will be read from / written to the USB interface in the next data transaction. A data transaction usually follows a command transaction.

2. data transaction

A data transaction reads data from / writes data to the USB interface. The meaning of the data is dependent on the command transaction which was sent before the data transaction.

I2C

ENABLE LED

Protocol

An I

C transaction starts with a ‘Start Condition’, followed by an

µC

SV00227

address. When the address matches either the command or data address the transaction starts and runs until a ‘Stop Condition’ or another ‘Start Condition’ (repeated start) occurs.

The command address is write-only and is unable to do a read. The next bytes in the message are interpreted as commands. Several command bytes can be sent after one command address. Each of the command bytes is acknowledged and passed on to the Memory Management Unit inside the PDIUSBH11.

When the start condition address matches the data address, the next bytes are interpreted as data. When the RW bit in the address indicates a ‘master writes data to slave’ (=‘0’) the bytes are received, acknowledged and passed on to the Memory Management Unit. If the RW bit in the address indicates a ‘master reads data from slave’ (=‘1’) the PDIUSBH11 will send data to the master. The I must acknowledge all data bytes except the last one. In this way the

C interface knows when the last byte has been transmitted and it

C-master

then releases the SDA line so that the master controller can generate the STOP condition.

Repeated start support allows another packet to be sent without generating a Stop Condition.

Two addresses are used to differentiate between command and data transactions. Writing to the command address is interpreted as a command, while reading from / writing to the data address is used to transfer data between the PDIUSBH11 and the controller.

ADDRESS TABLE

TYPE OF ADDRESS

Command 0011 011 (binary)

Data 0011 010 (binary)

1997 Aug 01

PHYSICAL ADDRESS

(MSB to LSB)

Timing

When the master writes data to the PDIUSBH11, the data is sampled 1 micro-second after the rising edge of SCL. When the PDIUSBH11 writes data to the master, the data is driven 1 micro-second after the falling edge of SCL.

Philips Semiconductors Product specification

PDIUSBH11Universal Serial Bus Hub

COMMAND SUMMARY

Some commands have the same command code (e.g., Read Buffer and Write Buffer). In these cases, the direction of the Data Phase (read or write) indicates which command is executed.

COMMAND NAME

Initialization Commands

Set Address / Enable Hub D0h Write 1 byte

Set Endpoint Enable Hub + Embedded Function D8h Write 1 byte

Data Flow Commands

Read Interrupt Register F4h Read 1 byte

Select Endpoint Hub Control OUT 00h Read 1 byte (optional)

Embedded Function Control OUT 02h Read 1 byte (optional)

Embedded Function Control IN 03h Read 1 byte (optional)

Embedded Function Interrupt 04h Read 1 byte (optional)

Read Last Transaction Status Hub Control OUT 40h Read 1 byte

Embedded Function Control OUT 42h Read 1 byte

Embedded Function Control IN 43h Read 1 byte

Embedded Function Interrupt 44h Read 1 byte

Read Endpoint Status Hub Control OUT 80h Read 1 byte

Embedded Function Control OUT 82h Read 1 byte

Embedded Function Control IN 83h Read 1 byte

Embedded Function Interrupt 84h Read 1 byte Read Buffer Selected Endpoint F0h Read n bytes Write Buffer Selected Endpoint F0h Write n bytes

Set Endpoint Status Hub Control OUT 40h Write 1 byte

Embedded Function Control OUT 42h Write 1 byte

Embedded Function Control IN 43h Write 1 byte

Embedded Function Interrupt 44h Write 1 byte

Acknowledge Setup Selected Endpoint F1h None

Clear Buffer Selected Endpoint F2h None

Validate Buf fer Selected Endpoint FAh None

Hub Commands

Clear Port Feature Port 2 E0h Write 1 byte

Set Port Feature Port 2 E8h Write 1 byte

Get Port Status Port 2 E0h Read 1 or 2 bytes

Set Status Change Bits F7h Write 1 byte

General Commands

Send Resume F6h None

Read Current Frame Number F5h Read 1 or 2 bytes

RECIPIENT CODING DATA PHASE

Embedded Function D1h Write 1 byte

Hub Control IN 01h Read 1 byte (optional)

Hub Control IN 41h Read 1 byte

Hub Control IN 81h Read 1 byte

Hub Control IN 41h Write 1 byte

Port 3 E1h Write 1 byte Port 4 E2h Write 1 byte Port 5 E3h Write 1 byte

Port 3 E9h Write 1 byte Port 4 EAh Write 1 byte Port 5 EBh Write 1 byte

Port 3 E1h Read 1 or 2 bytes Port 4 E2h Read 1 or 2 bytes Port 5 E3h Read 1 or 2 bytes

1997 Aug 01

Philips Semiconductors Product specification

PDIUSBH11Universal Serial Bus Hub

COMMAND DESCRIPTIONS

Command Procedure

There are four basic types of commands: Initialization, Data, Hub Specific and General commands. Respectively, these are used t o initialize the hub and embedded function; for data flow between the hub, embedded function and the host; some hub specific commands for controlling individual downstream ports; and some general commands.

Initialization Commands

Initialization commands are used during the enumeration process of the USB network. These commands are used to enable the hub and embedded function endpoints. They are also used to set the USB assigned address.

Set Address / Enable

Command : D0h (Hub), D1h (Embedded Function) Data : Write 1 byte

This command is used to set the USB assigned address and enable the hub or embedded function respectively. The hub always powers up disabled and should be enabled after a bus RESET.

706050403020100 0

ADDRESS THE VALUE WRITTEN BECOMES THE ADDRESS ENABLE A ‘1’ ENABLES THIS FUNCTION

POWER ON VALUE

ADDRESS ENABLE

SV00385

Set Endpoint Enable

Command : D8h Data : Write 1 byte

Interrupt endpoints can only be enabled when the hub/function is enabled via the Set Address/Enable command.

7X6X5X4X3X20100

POWER ON VALUE

HUB’S INTERRUPT ENDPOINT FUNCTION’S INTERRUPT ENDPOINT

RESERVED

1997 Aug 01

HUB’S INTERRUPT ENDPOINT A VALUE OF ‘1’ INDICATES THE HUB’S INTERRUPT ENDPOINT IS ENABLED. FUNCTION’S INTERRUPT ENDPOINT A VALUE OF ‘1’ INDICATES THE EMBEDDED FUNCTION’S INTERRUPT ENDPOINT IS ENABLED.

SV00387

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