Philips PDIUSBD11D, PDIUSBD11N Datasheet

INTEGRATED CIRCUITS

PDIUSBD11

USB device with serial interface

Product specification						1999 Jul 22
Supersedes data of 1999 Nov 19

P s

on o s

Philips Semiconductors	Product specification
USB device with serial interface	PDIUSBD11

FEATURES

•Complies with the Universal Serial Bus specification Rev. 1.1

•Complies with the ACPI, OnNOW, and USB power management requirements

•Compliant with USB Human Interface Devices and Monitor Control Class

•Compliant with System Management Bus Specification Rev. 1.0

•Integrated SIE (Serial Interface Engine), FIFO memory and transceivers

•Automatic USB protocol handling

•High speed I2C Interface (up to 1 Mbit/s)

•Compatible with the PDIUSBH11 software

•Software controllable connection to USB bus (SoftConnect )

•Low frequency 12 MHz crystal oscillator eases EMI design issues

•Programmable output clock frequency

•Bus powered capability with very low suspend current

•Controllable LazyClock output during suspend

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

•Available in 16-pin DIP and SO packages

•Full-scan design with high fault coverage (>99%) insures high quality

•Higher than 8 kV in-circuit ESD protection lowers cost of extra components

DESCRIPTION

The Universal Serial Bus hub PDIUSBD11 is a cost and feature-optimized USB interface device. It is used in microcontroller-based systems and communicates with the system microcontroller over the high speed I2C serial bus. This modular approach to implementing USB functions allows the designer to choose the optimum system microcontroller from the available wide variety. This flexibility cuts down the development time, risks, and costs by allowing the use of the existing architecture and the firmware investments. This results in the fastest way to develop the most cost-effective USB peripheral solutions. The PDIUSBD11 is ideally suited for computer monitors, docking stations, keyboards, and many other applications that use the I2C or the SMBus-based architecture.

The PDIUSBD11 conforms to the USB specification Rev. 1.1, I2C serial interface and the SMBus specifications. It is fully compliant with the Human Interface Device Class and Monitor Control Class specifications. Its low suspend power consumption along with the programmable LazyClock output allows for easy implementation of equipment that is compliant to the ACPI, OnNOW, and USB power management requirements. The low operating power allows the implementation of bus-powered function.

The PDIUSBD11 is fully backward compatible to the PDIUSBH11/PDIUSBH11A software. In addition, it also incorporates the feature enhancements like SoftConnect , LazyClock, programmable clock output, lower frequency crystal oscillator, multiple function endpoints and integration of termination resistors. All of these feature enhancements contribute to significant cost savings in the system implementation and at the same time ease the implementation of advanced USB functionality into the peripherals.

ORDERING INFORMATION

PACKAGES	TEMPERATURE RANGE	OUTSIDE NORTH AMERICA	NORTH AMERICA	PKG. DWG. #
16-pin plastic SO	±40°C to +85°C	PDIUSBD11 D	PDIUSBD11 D	SOT162-1
16-pin plastic DIP	±40°C to +85°C	PDIUSBD11 N	PDIUSBD11 N	SOT38-4

BLOCK DIAGRAM

			12 MHz
	UPSTREAM
3.3V	PORT
	D+	D±	PLL
1.5kW				INTEGRATED
				RAM
D+			BIT CLOCK
SoftConnect	ANALOG
			RECOVERY
	TX/RX		FULL SPEED
						INTERRUPT
			PHILIPS	MEMORY	I2C	SDA
				MANAGEMENT	SLAVE
			SIE
				UNIT	INTERFACE	SCL

SV00823

NOTE:

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

1999 Jul 22

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853-2050 22023

Philips Semiconductors	Product specification
USB device with serial interface	PDIUSBD11

Analog Transceiver

The transceiver interfaces directly to the USB cables through some termination resistors. They are capable of transmitting and receiving serial data at ªfull speedº (12 Mbit/s) only.

PLL

A 12 MHz to 48 MHz clock multiplier PLL (Phase-Locked Loop) is integrated on-chip. This allows for the use of low-cost 12 MHz crystal. EMI is also minimized due to lower frequency crystal. No external components are needed for the operation of the PLL.

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 specification.

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/de-stuffing, 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 bursts of 12 Mbit/s and the I2C interface to the microcontroller, running at up to 1 Mbit/s. This allows the microcontroller to read and write USB packets at its own speed through I2C.

I2C Slave Interface

This block implements the necessary I2C interface protocol. A slave I2C allows for simple micro-coding. An interrupt is used to alert the microcontroller whenever the PDIUSBD11 needs attention. As a slave I2C device, the PDIUSBD11 I2C clock: SCL is an input and is controlled by the microcontroller. The I2C interface can run up to

1 Mbit/s.

SoftConnect

The connection to the USB is accomplished by bringing D+ (for high-speed USB device) high through a 1.5 kW pull-up resistor. In the PDIUSBD11, the 1.5 kW pull-up resistor is integrated on-chip and is not connected to VCC by default. The connection of the internal resistor to Vcc is established through a command sent by the external/system microcontroller. This allows the system microcontroller to complete its initialization sequence before deciding to establish connection to the USB. Re-initialization of the USB bus connection can also be affected without requiring the pull out of the cable.

The PDIUSBD11 will check for USB VBUS availability before the connection can be established. VBUS sensing is provided through VBUS pin.

It should be noted that the tolerance of the internal resistors is higher (30%) than that specified by the USB specification (5%).

However, the overall VSE voltage specification for the connection can still be met with good margin. The decision to make sure of this feature lies with the users.

SoftConnect is a patent pending technology from Philips Semiconductors.

ENDPOINT DESCRIPTIONS

					MAX
	ENDPOINT#	ENDPOINT INDEX	TRANSFER TYPE	DIRECTION	PACKET SIZE
					(BYTES)
	0	2	Control	OUT	8
		3		IN	8
	1	5	Generic	OUT	8
		4		IN	8
	2	6	Generic	OUT	8
		7		IN	8
	3	8	Generic	OUT	8
		9		IN	8

NOTE:

1. Generic endpoint can be used for Interrupt or Bulk endpoint.

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Philips Semiconductors	Product specification
USB device with serial interface	PDIUSBD11

PIN DESCRIPTION

PIN NO	PIN SYMBOL	TYPE	DRIVE	DESCRIPTION
1	TEST	Input		Connect to GND for normal operation
2	RESET_N	Input	ST	Power-on reset
3	XTAL1	Input		Crystal connection 1 (12MHz)
4	XTAL2	Output		Crystal connection 2 (12MHz)
5	CLKOUT	Output	3 mA	Programmable output clock for external devices
6	VCC	Power		Voltage supply 3.3V±0.3V
7	SUSPEND	Output	OD6	Device is in suspended state
8	INT_N	Output	OD6	Connect to microcontroller interrupt
9	SDA	I/O	OD6	I2C bi-directional data
10	SCL	I/O	OD6	I2C bit-clock
11	GND	Power		Ground reference
12	DP	AI/O		USB D+ connection
13	DM	AI/O		USB D± connection
14	AGND	Power		Analog ground reference
15	AVCC	Power		Analog voltage supply 3.3V±0.3V
16	VBUS	Input		USB VBUS sensing pin

NOTES:

1.Signals ending in _N indicate active LOW signals.

ST: Schmitt Trigger

OD6: Open Drain with 6 mA drive

AI/O: Analog I/O

APPLICATION DIAGRAM

3.3V	USB Upstream
	12 MHz

CLKOUT

I2C

D11

μC

FUNCTIONAL BLOCK

e.g. Monitor Control, Mouse, Keyboard, ...

SV00824

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Philips Semiconductors	Product specification
USB device with serial interface	PDIUSBD11

I2C Interface

Protocol

The I2C bus is used to interface to an external microcontroller needed to control the operation of the USB device. For cost consideration, the target system microcontroller can be shared and utilized for both the functional part as well as the USB protocol interfacing. The PDIUSBD11 implements a slave I2C interface. When the PDIUSBD11 needs to communicate with the microcontroller it asserts an interrupt signal. The microcontroller services this interrupt by reading the appropriate status register on the PDIUSBD11 through the I2C bus. (For more information about the I2C serial bus, refer to the I2C Handbook, Philips order number 9397 750 00013).

The I2C interface on the PDIUSBD11 defines two types of transactions:

•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.

•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.

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 PDIUSBH11A and the controller.

An I2C transaction starts with a Start Condition, followed by an 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 PDIUSBD11.

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 PDIUSBD11 will send data to the master. The I2C-master must acknowledge all data bytes except the last one. In this way the I2C interface knows when the last byte has been transmitted and it 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.

Timing

The I2C interface in the PDIUSBD11 can support clock speeds up to 1 MHz.

ADDRESS TABLE

	Physical Address
Type of Address	MSB to LSB
	(Binary)
Command	0011 011
Data	0011 010

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Philips Semiconductors	Product specification
USB device with serial interface	PDIUSBD11

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	RECIPIENT	CODING	DATA PHASE
Initialization Commands
Set Address/Enable	Function	D1h	Write 1 byte
Set Endpoint Enable	Function	D8h	Write 1 byte
Set Mode	Function	F3h	Write 2 byte
Data Flow Commands
Read Interrupt Register		F4h	Read 2 bytes
Select Endpoint	Control OUT Endpoint	00h	Read 1 byte (optional)
	Control IN Endpoint	01h	Read 1 byte (optional)
	Other Endpoints	00h+Endpoint Index	Read 1 byte (optional)
Read Last Transaction Status	Control OUT Endpoint	40h	Read 1 byte
	Control IN Endpoint	41h	Read 1 byte
	Other Endpoints	40h+Endpoint Index	Read 1 byte
Read Endpoint Status	Control OUT Endpoint	80h	Read 1 byte
	Control IN Endpoint	81h	Read 1 byte
	Other Endpoints	80h+Endpoint Index	Read 1 byte
Read Buffer	Selected Endpoint	F0h	Read n bytes
Write Buffer	Selected Endpoint	F0h	Write n bytes
Set Endpoint Status	Control OUT Endpoint	40h	Write 1 byte
Set Endpoint Status	Control IN Endpoint	41h	Write 1 byte
	Other Endpoints	40h+Endpoint Index	Write 1 byte
Acknowledge Setup	Selected Endpoint	F1h	None
Clear Buffer	Selected Endpoint	F2h	None
Validate Buffer	Selected Endpoint	FAh	None
General Commands
Send Resume		F6h	None
Read Current Frame Number		F5h	Read 1 or 2 bytes

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