Philips ISP1130 Datasheet

ISP1130

Universal Serial Bus compound hub with integrated keyboard controller

	Rev. 01 — 23 March 2000	Objective specification

1. General description

The ISP1130 integrates a Universal Serial Bus (USB) hub with a keyboard controller into a single chip, which complies with Universal Serial Bus Specification Rev. 1.1 and the USB Device Class Definition for Human Interface Devices (HID). The hub has

1 to 2 downstream ports and 1 to 3 non-removable embedded functions, one of which is dedicated to the keyboard operation. The hub controller is fully implemented in hardware, ensuring a fast response to host requests.

The integrated 5 V to 3.3 V regulator allows direct connection to the USB power supply VBUS. The downstream ports are either bus-powered or hybrid-powered and can interface low-power USB devices such as a joystick or a mouse. ISP1130 uses SoftConnect™ technology to connect to the USB host upon detection of VBUS. The low power consumption in ‘suspend’ mode allows easy design of equipment that is compliant with the ACPI™, OnNow™ and USB power management requirements.

The integrated keyboard controller is based on the 80C51 family and has 8 kbytes of mask ROM and 256 bytes of data RAM. The code memory is protected against reading by an external device. A built-in watchdog timer resets the device in case of a microcontroller hang-up. To reduce power consumption, the microcontroller can be put in sleep mode or power-down mode.

A serial I2C-bus interface is provided for optional access to an external EEPROM. This allows the user to program the vendor ID, product ID or activate the built-in keyboard matrix.

The ISP1130 has built-in overcurrent sense inputs, supporting individual and global overcurrent protection for downstream ports. All ports (including the hub) have GoodLink™ indicator outputs for easy visual monitoring of USB traffic. The ISP1130 has a reduced frequency (6 MHz) crystal oscillator to minimize Electro Magnetic Interference (EMI). These features allow significant cost savings in system design and easy implementation of advanced USB functionality into PC peripherals.

2. Features

■Compound USB hub device with integrated hub repeater, hub controller, Serial Interface Engine (SIE), data transceivers and 5 V to 3.3 V voltage regulator

■Complies with Universal Serial Bus Specification Rev. 1.1 and Device Class Definition for Human Interface Devices (HID)

■Complies with ACPI, OnNow and USB power management requirements

Philips Semiconductors	ISP1130
	USB compound hub with keyboard controller

■Supports bus-powered and hybrid-powered application

■1 to 2 downstream ports with automatic speed detection

■1 to 3 non-removable embedded functions, 1 dedicated for keyboard operation

■8 × 18 scan line matrix for HID compliant keyboard applications

■Integrated 80C51 microcontroller core with 8 kbytes mask ROM and 256 bytes data RAM

■On-chip watchdog timer for automatic fault recovery

■Internal power-on reset and low-voltage reset circuit

■Individual power switching for downstream ports

■Individual port overcurrent protection with built-in sense circuits

■6 MHz crystal oscillator with on-chip PLL for low EMI

■Reduced power consumption by putting microcontroller in sleep mode or power-down mode

■Visual USB traffic monitoring (GoodLink) for hub and downstream ports

■I2C-bus interface to read vendor ID, product ID and configuration bits from external EEPROM

■Operation over the extended USB bus voltage range (4.0 to 5.5 V)

■Operating temperature range −40 to +85 °C

■Available in 56-pin SDIP and SSOP packages.

3.Ordering information

Table 1: Ordering information

Type number	Package
	Name	Description	Version
ISP1130DL	SSOP56	plastic shrink small outline package; 56 leads; body width 7.5 mm	SOT371-1
ISP1130N	SDIP56	plastic shrink dual in-line package; 56 leads (600 mil)	SOT400-1

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Objective specification

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full andbook,

upstream port

6 MHz

pagewidth

UP_DP UP_DM

MEMSEL/UPGL

SYNCLK ALE, PSEN EA, INT

XTAL1

XTAL2

2

2

8

7

1

2

47

48

50, 51

49, 52

to LED

to EEPROM

to/from

48

keyboard

3.3 V

18 to 20

3

HUB

PLL

MHz

MX0

WATCH

1.5

GoodLink

OSCILLATOR

PROGRAM

DOG

to MX2

DIVIDER

21

kΩ

BIT CLOCK

TIMER

MX3/SCL

MX

22

RECOVERY

MCU_CLOCK

MX4/SDA

SoftConnect

23 to 25

3

KEY

MX5

PHILIPS

HUB

INT0

MATRIX

26 to 28,

to MX7

PORTS

SIE

CONTROLLER

16

ANALOG

31 to 43

MY0

INT1

to MY15

Tx/Rx

MY

44

MY16/RD

DEVICE

MICRO-

45

HANDLER

CONTROLLER

MY17/WR

16 BYTES RAM

80C51

53

HUB

END OF

SCRLOCK

FRAME

LED

54

REPEATER

NUMLOCK

TIMERS

PORTS

55

CAPSLOCK

PORT

CONTROLLER

8 kBYTE

256 BYTES

MASK ROM

RAM

ISP1130

ANALOG

GoodLink

ANALOG

GoodLink

5 V

VOLTAGE

3.3 V

internal

OC DETECT

OC DETECT

REGULATOR

supply

Tx/Rx

Tx/Rx

POWER SW

POWER SW

POWER-ON

internal

Connect

RESET

reset

10

9

15

13

12

11

16

14

4

30

6

3

5, 17, 29, 46, 56

4

MGS811

DN1_DP

OC1/DPGL1

DN2_DP

OC2/DPGL2

VCC

Vreg(3.3)

RESET

GND

DN1_DM

PSW1

DN2_DM

PSW2

Vpu(3.3)

downstream port 1

downstream port 2

Fig 1. Block diagram of ISP1130.

diagram Block .4

Semiconductors Philips

controller keyboard with hub compound USB

ISP1130

Philips Semiconductors	ISP1130
	USB compound hub with keyboard controller

5.Pinning information

5.1Pinning

handbook, halfpage
				XTAL1				1			56	GND
				XTAL2
								2			55		CAPSLOCK
				RESET				3			54		NUMLOCK
					VCC
								4			53		SCRLOCK
					GND
								5			52		INT
	Vpu(3.3)
								6			51		PSEN
		UP_DM
								7			50	ALE
		UP_DP
								8			49		EA
	DN1_DM											SYNCLK
								9			48
	DN1_DP
								10			47		MEMSEL/UPGL
	DN2_DM							11			46	GND
	DN2_DP							12			45	MY17/WR
					PSW1			13			44	MY16/RD
					PSW2			14		ISP1130DL	43	MY15
OC1/DPGL1								15			42	MY14
												MY13
OC2/DPGL2								16			41
					GND			17			40	MY12
					MX0							MY11
								18			39
					MX1							MY10
								19			38
					MX2							MY9
								20			37
	MX3/SCL
								21			36	MY8
	MX4/SDA
								22			35	MY7
					MX5
								23			34	MY6
					MX6
								24			33	MY5
					MX7
								25			32	MY4
					MY0
								26			31	MY3
					MY1
								27			30	Vreg(3.3)
					MY2
								28			29	GND

handbook, halfpage
				XTAL1			1		56	GND
				XTAL2
							2		55		CAPSLOCK
			RESET				3		54		NUMLOCK
					VCC
							4		53		SCRLOCK
					GND
							5		52		INT
	Vpu(3.3)
							6		51		PSEN
		UP_DM
							7		50	ALE
		UP_DP
							8		49		EA
	DN1_DM									SYNCLK
							9		48
	DN1_DP						10		47		MEMSEL/UPGL
	DN2_DM						11		46	GND
	DN2_DP						12		45	MY17/WR
					PSW1		13		44	MY16/RD
										MY15
					PSW2		14	ISP1130N	43
										MY14
OC1/DPGL1							15		42
										MY13
OC2/DPGL2							16		41
										MY12
					GND		17		40
					MX0					MY11
							18		39
					MX1					MY10
							19		38
					MX2					MY9
							20		37
	MX3/SCL									MY8
							21		36
	MX4/SDA									MY7
							22		35
					MX5					MY6
							23		34
					MX6					MY5
							24		33
					MX7					MY4
							25		32
					MY0					MY3
							26		31
					MY1					Vreg(3.3)
							27		30
					MY2					GND
							28		29

MGS810	MGS798
Fig 2. Pin configuration SSOP56.	Fig 3. Pin configuration SDIP56.

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5.2 Pin description

Table 2: Pin description (SSOP56 and SDIP56)

	Symbol [1]						Pin	Type	Description
	XTAL1						1	I	crystal oscillator input (6 MHz)
	XTAL2						2	O	crystal oscillator output (6 MHz)
							3	I	reset input (Schmitt trigger); a LOW level produces an
	RESET
									asynchronous reset; connect to VCC for power-on reset
									(internal POR circuit)
	VCC						4	-	supply voltage; connect to USB supply VBUS
	GND						5	-	ground supply
	Vpu(3.3)						6	-	regulated supply voltage (3.3 V ± 10%) from internal
									regulator; used to connect pull-up resistor on UP_DP line;
									pin function is controlled via the Device Status Register
									(see Table 36):
									Connect = 0 — Vpu(3.3) floating (high impedance)
									Connect = 1 — Vpu(3.3) = 3.3 V
	UP_DM						7	AI/O	upstream port D− connection (analog)
	UP_DP						8	AI/O	upstream port D+ connection (analog)
	DN1_DM						9	AI/O	downstream port 1 D− connection (analog)
	DN1_DP						10	AI/O	downstream port 1 D+ connection (analog)
	DN2_DM						11	AI/O	downstream port 2 D− connection (analog)
	DN2_DP						12	AI/O	downstream port 2 D+ connection (analog)
							13	O	power switch control output for downstream port 1
	PSW1
									(open-drain)
							14	O	power switch control output for downstream port 2
	PSW2
									(open-drain)
							15	AI/O	pin function is controlled via the USBCON register (see
	OC1/DPGL1
									Table 53):
									EnableOverCurrent = 0 — GoodLink LED indicator output
									for downstream port 1 (analog, open-drain); to connect an
									LED use a 330 Ω series resistor
									EnableOverCurrent = 1 — overcurrent sense input for
									downstream port 1 (analog or digital); overcurrent sensing
									can be either analog (AnalogOCDisable = 0) or digital
									(AnalogOCDisable = 1)
							16	AI/O	pin function is controlled via the USBCON register (see
	OC2/DPGL2
									Table 53):
									EnableOverCurrent = 0 — GoodLink LED indicator output
									for downstream port 2 (analog, open-drain); to connect an
									LED use a 330 Ω series resistor
									EnableOverCurrent = 1 — overcurrent sense input for
									downstream port 2 (analog or digital); overcurrent sensing
									can be either analog (AnalogOCDIsable = 0) or digital
									(AnalogOCDisable = 1)
	GND						17	-	ground supply
	MX0						18	I	keyboard matrix return line (5 V tolerant, open drain) [2]
	MX1						19	I	keyboard matrix return line (5 V tolerant, open drain) [2]
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							USB compound hub with keyboard controller
	Table 2: Pin description (SSOP56 and SDIP56)…continued
	Symbol [1]				Pin	Type	Description
	MX2				20	I	keyboard matrix return line (5 V tolerant, open drain) [2]
	MX3/SCL				21	I/O	pin function is controlled via the I2C0CON register (see
							Table 76):
							ENS1 = 0 — keyboard matrix return line (5 V tolerant,
							open drain) [2]
							ENS1 = 1 — I2C-bus clock output (5 V tolerant, open
							drain) [2]
	MX4/SDA				22	I/O	pin function is controlled via the I2C0CON register (see
							Table 76):
							ENS1 = 0 — keyboard matrix return line (5 V tolerant,
							open drain) [2]
							ENS1 = 1 — bidirectional I2C-bus data line (5 V tolerant,
							open drain) [2]
	MX5				23	I	keyboard matrix return line(5 V tolerant, open drain) [2]
	MX6				24	I	keyboard matrix return line (5 V tolerant, open drain) [2]
	MX7				25	I	keyboard matrix return line (5 V tolerant, open drain) [2]
	MY0				26	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY1				27	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY2				28	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	GND				29	-	ground supply
	Vreg(3.3)				30	-	regulated supply voltage (3.3 V ± 10%) from internal
							regulator; used to supply external devices
	MY3				31	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY4				32	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY5				33	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY6				34	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY7				35	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY8				36	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY9				37	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY10				38	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY11				39	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY12				40	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY13				41	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY14				42	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
	MY15				43	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3]
					44	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3];
	MY16/RD
							used as read strobe when accessing external memory
					45	I/O	bidirectional keyboard matrix scan line (5 V tolerant) [3];
	MY17/WR
							used as write strobe when accessing external memory
	GND				46	-	ground supply

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										USB compound hub with keyboard controller
	Table 2: Pin description (SSOP56 and SDIP56)…continued
	Symbol [1]							Pin	Type	Description
								47	O	pin function is controlled via the USBCON register (see
	MEMSEL/
	UPGL									Table 53):
										GL-MEMSELSelection = 0 — upstream port GoodLink
										indicator output (open-drain)
										GL-MEMSELSelection = 1 — chip select output for
										external serial EEPROM (open-drain)
	SYNCLK							48	O	embedded microcontroller clock output; used for emulation
								49	I	External Address enable input (internal pull-up); used to
	EA
										access external memory
	ALE							50	O	Address Latch Enable output; used to demultiplex AD0
										during external memory access
								51	O	Program Store ENable output; selects external memory for
	PSEN
										program execution
								52	I	external interrupt input (edge-triggered)
	INT
								53	O	control output for Scroll Lock LED (open-drain)
	SCRLOCK
								54	O	control output for Num Lock LED (open-drain)
	NUMLOCK
								55	O	control output for Caps Lock LED (open-drain)
	CAPSLOCK
	GND							56	-	ground supply

[1]Symbol names with an overscore (e.g. NAME) indicate active LOW signals.

[2]MXn pins have an internal 8.2 kΩ pull-up resistor.

[3]MYn pins have an internal 82 kΩ pull-down resistor (keyboard matrix enabled) or an internal 8.2 kΩ pull-up resistor (keyboard matrix disabled). This is controlled by bit DisableKBDMatrix in the USBCON register, see Table 53.

6.Functional description

The ISP1130 is a compound USB hub with an integrated keyboard controller. It has 2 bus-powered downstream ports with 3 non-removable embedded functions, the first of which is dedicated to the keyboard function. The downstream ports can be used to connect low-speed or full-speed USB peripherals, such as a mouse, printer, another keyboard or another hub. The block diagram is shown in Figure 1.

The embedded functions have no external hardware connections. They provide USB endpoints for equipment functions implemented by a microcontroller. Each endpoint has an associated FIFO buffer in the on-board RAM, which can be accessed by the integrated microcontroller via memory mapped registers using special commands (see Section 9).

An optional serial I2C-bus interface (see Section 11) is provided for external EEPROM access, allowing the user to program the vendor ID, product ID or activate the built-in keyboard matrix.

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	USB compound hub with keyboard controller

6.1 80C51 microcontroller

An integrated 80C51 microcontroller serves as a keyboard controller. It has 8 kbytes of mask ROM and 256 bytes of RAM. The I/O ports have been configured as an

8 × 18 line scan matrix. Three LED control outputs are available for keyboard status indicators (Caps Lock, Num Lock and Scroll Lock). Interfacing to the USB hub is done via 3 registers (command, data, status), which are accessible via the external data memory address space (MOVX instruction).

The keyboard firmware resides in the ROM and enumerates the embedded function as ‘HID compatible keyboard device’ during hub initialization.

The microcontroller runs on a 12 MHz clock, derived from the PLL oscillator. A watchdog timer resets the microcontroller in case of a software hang-up.

6.2 Analog transceivers

The integrated transceivers interface directly to the USB cables through external 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. The slew rates are adjusted according to the speed of the device connected and lie within the range mentioned in the USB Specification Rev. 1.1.

6.3 Philips Serial Interface Engine (SIE)

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 (de-)stuffing, CRC checking/generation, Packet IDentifier (PID) verification/generation, address recognition, handshake evaluation/generation.

6.4 Hub repeater

The hub repeater is responsible for managing connectivity on a ‘per packet’ basis. It implements ‘packet signalling’ and ‘resume’ connectivity. Low-speed devices can be connected to downstream ports. If a low-speed device is detected the repeater will not propagate upstream packets to the corresponding port, unless they are preceded by a PREAMBLE PID.

6.5 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.

6.6 General and individual port controller

The general and individual port controllers together provide status and control of individual downstream ports. Any port status change will be reported to the host via the hub status change (interrupt) endpoint.

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	USB compound hub with keyboard controller

6.7 GoodLink

Indication of a good USB connection is provided through GoodLink technology. An LED can be directly connected via an external 330 Ω resistor. The ISP1130 supports GoodLink indication for the hub (upstream port) via output MEMSEL/UPGL and for the two downstream ports via OCn/DPGLn, controlled via bits GL-MEMSELSelection and EnableOverCurrent in the USBCON register (see Table 53).

During enumeration the LED blinks on momentarily. After successful configuration of the ISP1130, the LED is permanently on. The hub GoodLink indicator blinks off for approximately 128 ms when the hub receives a packet addressed to it. Downstream GoodLink indicators blink upon an acknowledgment from the associated port. In ‘suspend’ mode the LED is off.

This feature provides 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.

6.8 SoftConnect

The connection to the USB is accomplished by bringing D+ (for full-speed USB devices) HIGH through a 1.5 kΩ pull-up resistor. In the ISP1130, the 1.5 kΩ pull-up resistor is integrated on-chip and by default is disconnected from the +3.3 V supply.

The integrated microcontroller controls the connection of the internal resistor on D+ to

Vpu(3.3) via bit SoftConnect_N in the USBCON register (see Table 53). Bit Connect in the Device Status register switches on Vpu(3.3) (default is off) to an alternative external pull-up resistor. A functional schematic diagram is given in Figure 4.

dth	ISP1130
		Vpu(3.3)
	Connect
	(Device Status
	Register)
	3.3 V
	supply
	1.5 kΩ	1.5 kΩ
	(internal	(external
	pull-up)	pull-up)
	SoftConnect_N
	(Configuration
	Register)	UP_DP
	MGL920

Fig 4. SoftConnect control logic.

This mechanism allows the microcontroller to complete its initialization sequence before deciding to establish connection to the USB. Re-initialization of the USB connection can also be performed without disconnecting the cable.

It should be noted that the tolerance of the internal resistors is higher (30%) than is specified by the USB specification (5%). However, the overall VSE voltage specification for the connection can still be met with good margin (see Table 92). The decision to use this feature lies with the USB equipment designer.

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6.9 Bit clock recovery

The bit clock recovery circuit recovers the clock from the incoming USB data stream using a 4× oversampling principle. It is able to track jitter and frequency drift as specified by the USB Specification Rev. 1.1.

6.10 Voltage regulator

A 5 to 3.3 V DC-DC regulator is integrated on-chip to supply the analog transceiver and internal logic. This can also be used to supply the terminal 1.5 kΩ pull-up resistor on the D+ line of the upstream connection.

6.11 PLL clock multiplier

A 6 to 48 MHz clock multiplier Phase-Locked Loop (PLL) is integrated on-chip. This allows for the use of low-cost 6 MHz crystals. The low crystal frequency also minimizes Electro-Magnetic Interference (EMI). The PLL requires no external components.

6.12 Overcurrent detection

An overcurrent detection circuit for downstream ports has been integrated on-chip. It is self-reporting, resets automatically, has a low trip time and requires no external components. The ISP1130 supports individual overcurrent detection.

6.13 Power-on reset

The ISP1130 has an internal power-on reset circuit, which generates a reset pulse when the supply voltage is switched on and when the supply voltage drops below a predetermined threshold value (see Table 89).

6.14 I2C-bus interface

A serial I2C-bus interface (single master or slave, bit rate up to 400 kHz) is provided to read vendor ID, product ID and other configuration data from an external EEPROM (e.g., Philips PCF8582 or equivalent). For more information, see Section 11.

The I2C-bus interface timing is programmable and complies with the standard mode and the Fast mode of operation as described in The I2C-bus and how to use it, order number 9398 393 40011.

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	USB compound hub with keyboard controller

7. Endpoint descriptions

Each USB device is logically composed of several independent endpoints. An endpoint acts as a terminus of a communication flow between the host and the device. At design time each endpoint is assigned a unique number (endpoint identifier, see Table 3). 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.

7.1 Endpoint configuration

The ISP1130 hub has 1 to 2 downstream ports and 1 to 3 embedded functions. The upstream and downstream ports are fully handled by hardware and require no firmware intervention. Downstream port 2 can be disabled by connecting both D+ and D− to VCC.

The number of embedded functions can be configured from 1 to 3 via the USBCONA register. These embedded functions give access to the keyboard controller and other optional software functions. The functions are assigned as follows:

•Embedded function 1: standard keyboard

•Embedded function 2:

–multimedia functions (e.g. volume control)

–ACPI system control

–application launch keys

• Embedded function 3: user-defined functions.

Each embedded function has two endpoint types: endpoint 0 (control) and endpoint 1 (generic: bulk and/or interrupt). The embedded function endpoints can handle a maximum of 8 bytes per transfer.

Table 3: Endpoint allocation

Function	Ports	Endpoint	Transfer	Endpoint	Direction [1]	Max. packet
		identifier	type	index		size (bytes)
	0: upstream	0	control	- [2]	OUT	64
Hub	1, 2 [4]:			- [2]	IN	64
	downstream	1	interrupt	- [2]	IN	1
Embedded	3 (or 2 [5])	0	control	0	OUT	8
Function 1
				1	IN	8
		1	generic [3]	2	OUT	8
				3	IN	8
Embedded	4 (or 3 [5])	0	control	4	OUT	8
Function 2
				5	IN	8
		1	generic [3]	6	OUT	8
				7	IN	8

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				USB compound hub with keyboard controller
	Table 3: Endpoint allocation…continued
	Function	Ports	Endpoint	Transfer	Endpoint	Direction [1]	Max. packet
			identifier	type	index		size (bytes)
	Embedded	5 (or 4 [5])	0	control	8	OUT	8
	Function 3
					9	IN	8
			1	generic [3]	10	OUT	8
					11	IN	8

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

[2]Hub endpoints are not indexed.

[3]Generic endpoint can be used as bulk or interrupt endpoint.

[4]Port 2 can be disabled by connecting both D+ and D− to VCC.

[5]The port number is reduced by 1 when downstream port 2 is disabled.

7.2Hub endpoint 0 (control)

All USB devices and functions must implement a default control endpoint (ID = 0). This endpoint is used by the host to configure the device and to perform generic USB status and control access.

The ISP1130 hub supports the following USB descriptor information through its control endpoint 0, which can handle transfers of 64 bytes maximum:

•Device descriptor

•Configuration descriptor

•Interface descriptor

•Endpoint descriptor

•Hub descriptor

•String descriptor.

7.3Hub endpoint 1 (interrupt)

Endpoint 1 is used by the ISP1130 hub to provide port status change information to the host. This endpoint can be accessed only after the hub has been configured by the host (by sending the Set Configuration command).

Endpoint 1 is an interrupt endpoint: the host polls it once every 255 ms by sending an IN token. If the hub has detected no change in the port status it returns a NAK (Not AcKnowledge) response to this request, otherwise it sends the Status Change byte (see Table 4).

Table 4: Status Change byte: bit allocation

	Bit	Symbol	Description
0		Hub SC	a logic 1 indicates a status change on the hub’s upstream port
1		Port 1 SC	a logic 1 indicates a status change on downstream port 1
2		Port 2 SC	a logic 1 indicates a status change on downstream port 2 or on
			embedded function 1 (downstream port 2 disabled)
3		Port 3 SC	a logic 1 indicates a status change on embedded function 1 or on
			embedded function 2 (downstream port 2 disabled)
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	Table 4: Status Change byte: bit allocation…continued
	Bit	Symbol	Description
4		Port 4 SC	a logic 1 indicates a status change on embedded function 2 or on
			embedded function 3 (downstream port 2 disabled)
5		Port 5 SC	a logic 1 indicates a status change on embedded function 3; not used
			if downstream port 2 is disabled
6		reserved	not used
7		reserved	not used

8. Host requests

The ISP1130 handles all standard USB requests from the host via control endpoint 0. The control endpoint can handle a maximum of 64 bytes per transfer.

Remark: Please note that the USB data transmission order is Least Significant Bit (LSB) first. In the following tables multi-byte variables are displayed least significant byte first.

8.1	Standard requests
	Table 5 shows the supported standard USB requests. Some requests are explicitly
	unsupported. All other requests will be responded with a STALL packet.
Table 5: Standard USB requests
Request name	bmRequestType	bRequest	wValue	wIndex	wLength	Data
	byte 0 [7:0]	byte 1	byte 2, 3	byte 4, 5	byte 6, 7
	(Bin)	(Hex)	(Hex)	(Hex)	(Hex)
Address
Set Address	X000 0000	05	address [1]	00, 00	00, 00	none
Configuration
Get Configuration	1000 0000	08	00, 00	00, 00	01, 00	configuration
						value = 01H
Set Configuration (0)	X000 0000	09	00, 00	00, 00	00, 00	none
Set Configuration (1)	X000 0000	09	01, 00	00, 00	00, 00	none
Descriptor
Get Configuration	1000 0000	06	00, 02	00, 00	length [2]	configuration,
Descriptor						interface and
						endpoint
						descriptors
Get Device Descriptor	1000 0000	06	00, 01	00, 00	length [2]	device
						descriptor
Get String Descriptor (0)	1000 0000	06	00, 03	00, 00	length [2]	language ID
						string
Get String Descriptor (1)	1000 0000	06	01, 03	09, 04	length [2]	manufacturer
						string
Get String Descriptor (2)	1000 0000	06	02, 03	09, 04	length [2]	product string

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Table 5: Standard USB requests…continued
	Request name	bmRequestType	bRequest	wValue	wIndex	wLength	Data
		byte 0 [7:0]	byte 1	byte 2, 3	byte 4, 5	byte 6, 7
		(Bin)	(Hex)	(Hex)	(Hex)	(Hex)
	Feature
	Clear Device Feature	X000 0000	01	01, 00	00, 00	00, 00	none
	(REMOTE_WAKEUP)
	Clear Endpoint (1)	X000 0010	01	00, 00	81, 00	00, 00	none
	Feature (HALT/STALL)
	Set Device Feature	X000 0000	03	01, 00	00, 00	00, 00	none
	(REMOTE_WAKEUP)
	Set Endpoint (1)	X000 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
	Get Endpoint (0) Status	1000 0010	00	00, 00	00/80 [3], 00	02, 00	endpoint 0
							status
	Get Endpoint (1) Status	1000 0010	00	00, 00	81, 00	02, 00	endpoint 1
							status
	Unsupported
	Set Descriptor	0000 0000	07	XX, XX	XX, XX	XX, XX	descriptor;
							STALL
	Get Interface	1000 0001	0A	00, 00	XX, XX	01, 00	STALL
	Set Interface	X000 0001	0B	XX, XX	XX, XX	00, 00	STALL
	Synch Frame	1000 0010	0C	00, 00	XX, XX	02, 00	STALL

[1]Device address: 0 to 127.

[2]Returned value in bytes.

[3]MSB specifies endpoint direction: 0 = OUT, 1 = IN. The ISP1130 accepts either value.

8.2		Hub specific requests
		In Table 6 the supported hub specific requests are listed, as well as some
		unsupported requests. Table 7 provides the feature selectors for setting or clearing
		port features.
Table 6: Hub specific requests
	Request name	bmRequestType	bRequest	wValue	wIndex	wLength	Data
		byte 0 [7:0]	byte 1	byte 2, 3	byte 4, 5	byte 6, 7
		(Bin)	(Hex)	(Hex)	(Hex)	(Hex)
	Descriptor
	Get Hub Descriptor	1010 0000	06	00, 00/29 [1]	00, 00	length [2], 00	hub descriptor
	Feature
	Clear Hub Feature	X010 0000	01	00, 00	00, 00	00, 00	none
	(C_LOCAL_POWER)
	Clear Port Feature	X010 0011	01	feature [3], 00	port [4], 00	00, 00	none
	(feature selectors)
	Set Port Feature	X010 0011	03	feature [3], 00	port [4], 00	00, 00	none
	(feature selectors)
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Table 6: Hub specific requests …continued
	Request name	bmRequestType	bRequest	wValue	wIndex	wLength	Data
		byte 0 [7:0]	byte 1	byte 2, 3	byte 4, 5	byte 6, 7
		(Bin)	(Hex)	(Hex)	(Hex)	(Hex)
	Status
	Get Hub Status	1010 0000	00	00, 00	00, 00	04, 00	hub status and
							status change
							field
	Get Port Status	1010 0011	00	00, 00	port [4], 00	04, 00	port status
	Unsupported
	Get Bus Status	1010 0011	02	00, 00	port [4], 00	01, 00	STALL
	Clear Hub Feature	X010 0000	01	01, 00	00, 00	00, 00	STALL
	(C_OVER_CURRENT)
	Set Hub Descriptor	X010 0000	07	XX, XX	00, 00	3E, 00	STALL
	Set Hub Feature	X010 0000	03	00, 00	00, 00	00, 00	STALL
	(C_LOCAL_POWER)
	Set Hub Feature	X010 0000	03	01, 00	00, 00	00, 00	STALL
	(C_OVER_CURRENT)

[1]USB Specification Rev. 1.0 uses 00H, USB Specification Rev. 1.1 specifies 29H.

[2]Returned value in bytes.

[3]Feature selector value, see Table 7.

[4]Downstream port identifier: 1 to 5 (1, 2: downstream ports, 3 to 5: embedded functions 1 to 3). If downstream port 2 is disabled, the port identifiers are 1 to 4 (1: downstream port, 2 to 4: embedded functions 1 to 3).

Table 7: Port feature selectors

Feature selector name	Value (Hex)	Set feature	Clear feature
PORT_CONNECTION	00	not used	not used
PORT_ENABLE	01	not used	disables a port
PORT_SUSPEND	02	suspends a port	resumes a port
PORT_OVERCURRENT	03	not used	not used
PORT_RESET	04	resets and enables	not used
		a port
PORT_POWER	08	powers on a port	powers off a port
PORT_LOW_SPEED	09	not used	not used
C_PORT_CONNECTION	10	not used	clears port connection
			change bit
C_PORT_ENABLE	11	not used	clears port enable
			change bit
C_PORT_SUSPEND	12	not used	clears port suspend
			change bit
C_PORT_OVERCURRENT	13	not used	clears port overcurrent
			change bit
C_PORT_RESET	14	not used	clears port reset
			change bit

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8.3 Descriptors

The ISP1130 hub controller supports the following standard USB descriptors:

•Device

•Configuration

•Interface

•Endpoint

•Hub

•String.

Table 8: Device descriptor

Values in square brackets are optional.

Offset	Field name	Size	Value	Comments
(bytes)		(bytes)	(Hex)
0	bLength	1	12	descriptor length = 18 bytes
1	bDescriptorType	1	01	type = DEVICE
2	bcdUSB	2	10, 01	USB Specification Rev. 1.1
4	bDeviceClass	1	09	HUB_CLASSCODE
5	bDeviceSubClass	1	00	-
6	bDeviceProtocol	1	00	-
7	bMaxPacketSize0	1	40	packet size = 64 bytes
8	idVendor	2	VID	vendor ID; programmable via the Set
				VID/PID command (see Table 43)
10	idProduct	2	PID	product ID; programmable via the Set
				VID/PID command (see Table 43)
12	bcdDevice	2	00,	device release 1.0 (XX = 01H); silicon
			XX [1]	revision increments this value
14	iManufacturer	1	00	no manufacturer string (default)
			[01]	manufacturer string enabled [2]
15	iProduct	1	00	no product string (default)
			[02]	product string enabled [2]
16	iSerialNumber	1	00	no serial number string
17	bNumConfigurations	1	01	one configuration

[1]XX represents the hardware setting DEVREV, which indicates the 8-bit device release number. This value is incremented upon silicon revision.

[2]Controlled via bit StringDescriptorEnable in the Set Mode command (see Table 25).

	Table 9:	Configuration descriptor
	Values in square brackets are optional.
	Offset	Field name	Size	Value	Comments
	(bytes)		(bytes)	(Hex)
0		bLength	1	09	descriptor length = 9 bytes
1		bDescriptorType	1	02	type = CONFIGURATION
2		wTotalLength	2	19, 00	total length of configuration, interface
					and endpoint descriptors (25 bytes)
4		bNumInterfaces	1	01	one interface
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	Table 9:	Configuration descriptor …continued
	Values in square brackets are optional.
	Offset	Field name	Size	Value	Comments
	(bytes)		(bytes)	(Hex)
5		bConfigurationValue	1	01	configuration value = 1
6		iConfiguration	1	00	no configuration string
7		bmAttributes	1	A0	bus-powered with remote wake-up
					(default)
				[E0]	hybrid-powered with remote wake-up;
					configured via bit 7 in the USBCON
					register (see Table 53)
	8	MaxPower [1]	1	32	100 mA

[1]Value in units of 2 mA.

Table 10:	Interface descriptor
Offset	Field name	Size	Value	Comments
(bytes)		(bytes)	(Hex)
0	bLength	1	09	descriptor length = 9 bytes
1	bDescriptorType	1	04	type = INTERFACE
2	bInterfaceNumber	1	00	-
3	bAlternateSetting	1	00	no alternate setting
4	bNumEndpoints	1	01	status change (interrupt) endpoint
5	bInterfaceClass	1	09	HUB_CLASSCODE
6	bInterfaceSubClass	1	00	-
7	bInterfaceProtocol	1	00	no class-specific protocol
8	bInterface	1	00	no interface string

Table 11:	Endpoint descriptor
Offset	Field name	Size	Value	Comments
(bytes)		(bytes)	(Hex)
0	bLength	1	07	descriptor length = 7 bytes
1	bDescriptorType	1	05	type = ENDPOINT
2	bEndpointAddress	1	81	endpoint 1, direction: IN
3	bmAttributes	1	03	interrupt endpoint
4	wMaxPacketSize	2	01, 00	packet size = 1 byte
6	bInterval	1	FF	polling interval (255 ms)

	Table 12:	Hub descriptor
	Offset	Field name	Size	Value	Comments
	(bytes)		(bytes)	(Hex)
0		bDescLength	1	09	descriptor length = 9 bytes
1		bDescriptorType	1	29	type = HUB
2		bNbrPorts	1	03 [2]	number of downstream ports (1 or 2;
					default = 2) + number of embedded
					functions (1 to 3; default = 1)
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	Table 12: Hub descriptor…continued
	Offset	Field name	Size	Value	Comments
	(bytes)		(bytes)	(Hex)
3		wHubCharacteristics	2	0D, 00	individual power switching,
					individual overcurrent protection
				15, 00	individual power switching,
					no overcurrent protection
	5	bPwrOn2PwrGood [1]	1	32	100 ms
6		bHubContrCurrent	1	64	maximum hub controller current
					(100 mA)
7		DeviceRemovable	1	08 [3]	downstream ports removable;
					embedded functions non-removable
8		PortPwrCtrlMask	1	FF	must be all ones for compatibility with
					USB Specification Rev. 1.0

[1]Value in units of 2 ms.

[2]Depending on the number of embedded functions configured, the value ranges from 03H to 05H or from 02H to 04H (downstream port 2 disabled).

Remark: Downstream port 2 can be disabled by connecting both D+ and D− to VCC. Embedded functions are configured via the USBCONA register (see Table 55).

[3]Default value (08H): ports 1 and 2 removable, port 3 non-removable. The value can be 08H, 18H or 38H depending on the configured number of embedded functions (1, 2 or 3). When downstream port 2 is disabled, the possible values are 4CH, 0CH or 1CH (1, 2 or 3 embedded functions).

Table 13: String descriptors

String descriptors are optional and therefore disabled by default; they can be enabled via the

Set Mode command (see Table 25).

Offset	Field name	Size	Value	Comments
(bytes)		(bytes)	(Hex)
String descriptor (0): language ID string
0	bLength	1	04	descriptor length = 4 bytes
1	bDescriptorType	1	03	type = STRING
2	bString	2	09, 04	LANGID code zero
String descriptor (1): manufacturer string
0	bLength	1	2E	descriptor length = 46 bytes
1	bDescriptorType	1	03	type = STRING
2	bString	44	UC [1]	“Philips Semiconductors”
String descriptor (2): product string
0	bLength	1	10	descriptor length = 16 bytes
1	bDescriptorType	1	03	type = STRING
2	bString	14	UC [1]	“ISP113X” [2]; X = 0H for the ISP1130

[1]Unicode encoded string.

[2]X represents the hardware setting DEVNAME (4 bits), which specifies the final digit (X) in the device name string “ISP113X”. The Unicode representation of this digit is “0000.0000.0011.DEVNAME”.

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8.4 Hub responses

This section describes the hub responses to requests from the USB host.

8.4.1Get device status

The hub returns 2 bytes, see Table 14.

Table 14: Get device status response

Bit #	Function	Value	Description
0	self-powered	0	bus-powered
		1	hybrid-powered
1	remote wake-up	0	no remote wake-up
		1	remote wake-up enabled
2 to 15	reserved	0	-

8.4.2Get configuration

The hub returns 1 byte, see Table 15.

Table 15: Get configuration response

Bit #	Function	Value	Description
0	configuration value	0	device not configured
		1	device configured
1 to 7	reserved	0	-

8.4.3Get interface status

The hub returns 2 bytes, see Table 16.

Table 16: Get interface status response

Bit #	Function	Value	Description
0 to 15	reserved	0	-

8.4.4Get hub status

The hub returns 4 bytes, see Table 17.

Table 17: Get hub status response

Bit #	Function	Value	Description
0	local power source	0	local power supply good
1	overcurrent indicator	0	no overcurrent condition
		1	hub overcurrent condition detected
2 to 15	reserved	0	-
16	local power status change	0	no change in local power status
17	overcurrent indicator change	0	no change in overcurrent condition
		1	overcurrent condition changed
18 to 31	reserved	0	-

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8.4.5Get port status

The hub returns 4 bytes. The first 2 bytes contain the port status bits (wPortStatus, see Table 18). The last 2 bytes hold the port status change bits (wPortChange, see Table 19).

Table 18: Get port status response (wPortStatus)

Bit #	Function	Value	Description
0	current connect status	0	no device present
		1	device present on this port
1	port enabled/disabled	0	port disabled
		1	port enabled
2	suspend	0	port not suspended
		1	port suspended
3	overcurrent indicator	0	no overcurrent condition
		1	overcurrent condition detected
4	reset	0	reset not asserted
		1	reset asserted
5 to 7	reserved	0	-
8	port power	0	port powered off
		1	port power on
9	low-speed device attached	0	full-speed device attached
		1	low-speed device attached
10 to 15	reserved	0	-
Table 19: Get port status response (wPortChange)
Bit #	Function	Value	Description
0	connect status change	0	no change in current connect status
		1	current connect status changed
1	port enabled/disabled	0	no port error
	change
		1	port disabled by a port error
2	suspend change	0	no change in suspend status
		1	resume complete
3	overcurrent indicator change	0	no change in overcurrent status
		1	overcurrent indicator changed
4	reset change	0	no change in reset status
		1	reset complete
5 to 15	reserved	0	-

8.4.6Get configuration descriptor

The hub returns 25 bytes containing the configuration descriptor (9 bytes, see Table 9), the interface descriptor (9 bytes, see Table 10) and the endpoint descriptor (7 bytes, see Table 11).

8.4.7Get device descriptor

The hub returns 18 bytes containing the device descriptor, see Table 8.

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8.4.8Get hub descriptor

The hub returns 9 bytes containing the hub descriptor, see Table 12.

8.4.9Get string descriptor (0)

The hub returns 4 bytes containing the language ID, see Table 13.

8.4.10Get string descriptor (1)

The hub returns 46 bytes containing the manufacturer name, see Table 13.

8.4.11Get string descriptor (2)

The hub returns 16 bytes containing the product name, see Table 13.

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