INTEGRATED CIRCUITS PDIUSBH12 USB 2-port hub Product specification Supersedes data of 1999 Feb 25 1999 Jul 22 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 FEATURES DESCRIPTION • Complies with the Universal Serial Bus specification Rev. 1.0 • Complies with the ACPI, OnNOW, and USB power management The Universal Serial Bus Hub PDIUSBH12 is a cost and feature optimized second generation USB Hub with 2 downstream ports and 3 embedded functions (compound hub). It is normally used in any microcontroller-based system and communicates with the system microcontroller over the high speed I2C serial bus. This modular approach to implementing a hub and embedded 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 that need hub functionality. The PDIUSBH12 is ideally suited for computer monitors, docking stations, keyboards and many other applications that use the I2C or the SMBus based architecture. requirements • Compliant with USB Human Interface Devices and Monitor Control Class • Compliant with System Management Bus Specification Rev. 1.0 • Two downstream ports with per packet connectivity and auto speed detection • Supports up to 3 embedded functions • Integrated SIE (Serial Interface Engine), FIFO memory and transceivers The PDIUSBH12 conforms to the USB specification Rev 1.0, 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 the bus powered or the compound powered hub function. • Automatic USB protocol handling • High speed slave I2C Interface (up to 1 Mbit/s) • Compatible with the PDIUSBH11 hardware and software • Software controllable connection to USB bus (SoftConnect) • Good USB downstream connection indicators that blink with traffic (GoodLink) • 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 at 30 kHz (nominal) during suspend • Single 3.3V supply with 5V tolerant I/O • Available in 28-pin DIP and SO packages • Full-scan design with high fault coverage (>99%) insures high The PDIUSBH12 is fully backward compatible to the first generation PDIUSBH11 hardware and software. This allows an easy running change in the manufacturing line to realize the cost savings. In addition, it also incorporates the feature enhancements like SoftConnect, GoodLink, LazyClock, programmable clock output, lower frequency crystal oscillator, additional embedded functions 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. quality • Higher than 8 KV in-circuit ESD protection lowers cost of extra components ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. # 28-pin plastic SO –40°C to +85°C PDIUSBH12 D PDIUSBH12 D SOT136-1 28-pin plastic DIP –40°C to +85°C PDIUSBH12 N PDIUSBH12 N SOT117-1 1999 Jul 22 2 853-2062 22025 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 BLOCK DIAGRAM 12 MHz UPSTREAM PORT 3.3V D– D+ 1.5kΩ PLL D+ SoftConnect INTEGRATED RAM BIT CLOCK RECOVERY ANALOG TX/RX FULL SPEED PHILIPS SIE I2C SLAVE INTERFACE MEMORY MANAGEMENT UNIT END OF FRAME TIMERS HUB REPEATER GENERAL PORT CONTROLLER ANALOG TX/RX GOODLINK CONTROL ANALOG TX/RX INTERRUPT GOODLINK CONTROL NO LIGHT D+ D– LED DOWNSTREAM PORT 2 D+ D– LED LIT SDA SCL BLINKING NO DATA CONNECTED CONNECTION TRANSFER DOWNSTREAM PORT 3 GOODLINK SV00852 NOTE: 1. This is a conceptual block diagram and does not include each individual signal. 1999 Jul 22 3 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 Analog Transceivers Memory Management Unit (MMU) and Integrated RAM 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. 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. Hub Repeater The hub repeater is responsible for managing connectivity on a per packet basis. It implements packet signaling connectivity and resume connectivity. 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 PDIUSBH12 needs attention. As a slave I2C device, the PDIUSBH12 I2C clock: SCL is an input and is controlled by the microcontroller. The I2C interface can run up to 1 Mbit/s. 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 SoftConnect The connection to the USB is accomplished by bringing D+ (for high-speed USB device) high through a 1.5 kΩ pull-up resistor. In the PDIUSBH12, the 1.5 kΩ pull-up resistor is integrated on-chip and is not connected to VCC by default. Similarly, the 15 kΩ pull-down resistors are integrated on-chip and are not connected to GND by default. The connection of the internal resistors 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. 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 I2C-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 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. The PDIUSBH12 will check for USB VBUS availability before the connection can be established. VBUS sensing is provided through OCURRENT_N pin. See the pin description for details. Sharing of VBUS sensing and overcurrent sensing can be easily accomplished by using VBUS voltage as the pull-up voltage for the open drain output of the overcurrent indication device. 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. 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 use of this feature lies with the users. 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. SoftConnect is a patent pending technology from Philips Semiconductors. Philips Serial Interface Engine (PSIE) Good downstream USB connection indication is provided through GoodLink technology. When the port is enabled and there is at least one valid upstream traffic from the port, the LED indicator will be ON. The LED indicator will blink on every valid upstream traffic. A valid upstream traffic is defined as traffic with a good SOP and terminated by a good EOP. During global suspend, all LEDs will be OFF. GoodLink 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. This feature provides a user-friendly indicator on the status of the hub, the connected downstream devices and the USB traffic. It is a useful field diagnostics tool to isolate the faulty equipment. This feature helps lower the field support and the hotline costs. 1999 Jul 22 4 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 ENDPOINT DESCRIPTIONS There are two endpoint configuration modes supported by the PDIUSBH12, the Single Embedded Function mode and the Multiple (3) Embedded Function mode. The Single Embedded Function mode is the default at power up reset. The Multiple (3) Embedded Function mode can be configured by writing a zero to bit 7 of the first byte of the Set Mode command. Either mode is backward compatible to the PDIUSBH11. Table 1. SINGLE EMBEDDED FUNCTION MODE (DEFAULT AT POWER UP) FUNCTION PORTS ENDPOINT # ENDPOINT INDEX TRANSFER TYPE DIRECTION MAX PACKET SIZE (BYTES) Hub 0: Upstream 0 U t 2–3: Downstream 0 0 1 Control OUT IN 8 8 1 – Interrupt IN 1 0 2 3 Control OUT IN 8 8 1 5 4 Generic OUT IN 8 8 2 6 7 Generic OUT IN 8 8 3 8 9 Generic OUT IN 8 8 Embedded Function 1 1 NOTE: 1. Hub interrupt endpoint is not indexed. 2. Generic endpoint can be used for Interrupt or Bulk endpoint. Table 2. MULTIPLE (3) EMBEDDED FUNCTION MODE FUNCTION PORTS ENDPOINT # ENDPOINT INDEX TRANSFER TYPE DIRECTION MAX PACKET SIZE (BYTES) Hub 0: Upstream 0 U t 2–3: Downstream 0 0 1 Control OUT IN 8 8 1 – Interrupt IN 1 0 2 3 Control OUT IN 8 8 1 5 4 Generic OUT IN 8 8 0 10 11 Control OUT IN 8 8 1 6 7 Generic OUT IN 8 8 0 12 13 Control OUT IN 8 8 1 8 9 Generic OUT IN 8 8 Embedded Function 1 Embedded Function 6 Embedded Function 7 1999 Jul 22 1 6 7 5 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 PINNING The PDIUSBH12 has two modes of operation. The first mode (Mode 0) configures the pins DNx_GL_N for GoodLink LED indication. The second mode (Mode 1) configures the LED pins as per port overcurrent condition pins. An overcurrent condition on any port can be uniquely identified in Mode 1. However, all downstream ports are disabled as a result of a single overcurrent condition. In addition to the two modes of operation, the PDIUSBH12 can also be configured to take either a 48 MHz crystal oscillator (for backward compatibility to PDIUSBH11) or a 12 MHz crystal. The internal 4X clock multiplier PLL will be activated when 12 MHz input XTAL mode is selected. Also, the output clock frequency is now programmable rather than fixed to 12 MHz. The output clock frequency can be programmed through the Set Mode command. All these new features are added while maintaining backward compatibility to the PDIUSBH11 through TEST2 and TEST1 pins. TEST2 TEST1 MODE INPUT XTAL FREQUENCY (MHz) OUTPUT CLOCK FREQUENCY (AT REST) 00 MODE 0 (GoodLink) 48 12MHz 01 MODE 0 (GoodLink) 12 4 MHz 10 MODE 1 (Individual Overcurrent) 12 4 MHz 11 MODE 1 (Individual Overcurrent) 48 12 MHz NOTE: 1. Pin TEST3 should always be connected to Ground at all times. Pin configuration TEST1 1 28 UP_DM TEST2 2 27 UP_DP TEST3 3 26 AVCC RESET_N 4 25 AGND GND 5 24 DN2_DM XTAL1 6 23 DN2_DP XTAL2 7 22 DN3_DM CLKOUT 8 21 DN3_DP VCC 9 20 GND OCURRENT_N / 10 OCURRENT2_N SWITCH_N 11 19 SCL 18 SDA SUSPEND 12 17 INT_N DN2_GL_N 13 16 RSVD DN3_GL_N / 14 OCURRENT3_N 15 RSVD SV01751 NOTE: Pin 10 and Pin 14 show alternative pin functions, depending on mode of operation (Mode 0 or Mode 1) as described in Pin Description. 1999 Jul 22 6 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 Pin description (MODE 0 – Good Link) PIN NO. PIN SYMBOL TYPE DRIVE DESCRIPTION 1 TEST1 Input Connect to Ground for 48MHz crystal input. Connect to VCC for 12MHz crystal input. 2 TEST2 Input Connect to Ground 3 TEST3 Input Connect to Ground 4 RESET_N 5 GND 6 XTAL1 Input Crystal connection 1 (48 or 12MHz depending on TEST1 pin) 7 XTAL2 Output Crystal connection 2 (48 or 12MHz depending on TEST1 pin) 8 CLKOUT Output 9 VCC Power 10 OCURRENT_N 11 Input ST Power Power-on reset Ground reference 3mA Programmable output clock for external devices Voltage supply 3.3V ± 0.3V Over-current notice to the device. This pin is also used to sense the USB VBUS. A LOW on this pin of less than 2 seconds is interpreted as an overcurrent notice; longer than 2 seconds is interpreted as loss of VBUS. Input ST SWITCH_N Output OD6 Enables power to downstream ports 12 SUSPEND Output OD6 Device is in suspended state 13 DN2_GL_N Output OD6 Downstream port 2 GoodLink LED indicator 14 DN3_GL_N Output OD6 Downstream port 3 GoodLink LED indicator 15 RSVD 16 RSVD Input 17 INT_N Output OD6 Connect to microcontroller interrupt 18 SDA I/O OD6 I2C bi-directional data 19 SCL I/O OD6 I2C bit-clock 20 GND Power 21 DN3_DP AI/O Downstream port 3 D+ connection 22 DN3_DM AI/O Downstream port 3 D– connection 23 DN2_DP AI/O Downstream port 2 D+ connection 24 DN2_DM AI/O Downstream port 2 D- connection 25 AGND Power Analog Ground reference 26 AVCC Power Analog voltage supply 3.3V ± 0.3V 27 UP_DP AI/O Upstream D+ connection 28 UP_DM AI/O Upstream D- connection Input Reserved. Connect to GND for normal operation. Reserved. Connect to GND for normal operation. Ground reference NOTE: 1. Signals ending in _N indicate active low signals. ST: Schmitt Trigger OD6: Open Drain with 6 mA drive AI/O: Analog I/O 1999 Jul 22 7 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 Pin description (MODE 1 – Individual Overcurrent) PIN NO PIN SYMBOL TYPE DRIVE DESCRIPTION 1 TEST1 Input Connect to VCC for 48MHz crystal input. Connect to Ground for 12MHz crystal input. 2 TEST2 Input Connect to VCC 3 TEST3 Input 4 RESET_N Input 5 GND 6 XTAL1 Input 7 XTAL2 Output 8 CLKOUT Output 9 VCC Power 10 OCURRENT2_N 11 Connect to Ground ST Power Power-on reset Ground reference Crystal connection 1 (48 or 12MHz depending on TEST1 pin) Crystal connection 2 (48 or 12MHz depending on TEST1 pin) 3mA Programmable output clock for external devices Voltage supply 3.3V ± 0.3V Downstream port 2 over-current notice. This pin is also use to sense the USB VBUS. A LOW on this pin of less than 2 seconds is interpreted as an overcurrent notice; longer than 2 seconds is interpreted as loss of VBUS. Input ST SWITCH_N Output OD6 Enables power to downstream ports 12 SUSPEND Output OD6 Device is in suspended state 13 DN2_GL_N Output OD6 Downstream port 2 GoodLink LED indicator 14 OCURRENT3_N Input ST 15 RSVD Input Reserved. Connect to GND for normal operation. 16 RSVD Input Reserved. Connect to GND for normal operation. 17 INT_N Output OD6 Connect to microcontroller interrupt 18 SDA I/O OD6 I2C bi-directional data 19 SCL I/O OD6 I2C bit-clock 20 GND Power 21 DN3_DP AI/O Downstream port 3 D+ connection 22 DN3_DM AI/O Downstream port 3 D– connection 23 DN2_DP AI/O Downstream port 2 D+ connection 24 DN2_DM AI/O Downstream port 2 D- connection 25 AGND Power Analog Ground reference 26 AVCC Power Analog voltage supply 3.3V ± 0.3V 27 UP_DP AI/O Upstream D+ connection 28 UP_DM AI/O Upstream D- connection Downstream port 3 over-current notice Ground reference NOTE: 1. Signals ending in _N indicate active low signals. ST: Schmitt Trigger OD6: Open Drain with 6 mA drive AI/O: Analog I/O 1999 Jul 22 8 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 APPLICATION DIAGRAM 3.3V USB UPSTREAM CLKOUT 12MHz I2C µC H12 USB DOWNSTREAM 5V POWER SWITCH AND OVERCURRENT CIRCUIT SWITCHED 5V GOODLINK LED SV00853 I2C Interface ADDRESS TABLE The I2C bus is used to interface to an external microcontroller needed to control the operation of the hub. For cost consideration, the target system microcontroller can be shared and utilized for this purpose. The PDIUSBH12 implements a slave I2C interface. When the PDIUSBH12 needs to communicate with the microcontroller it asserts an interrupt signal. The microcontroller services this interrupt by reading the appropriate status register on the PDIUSBH12 through the I2C bus. (For more information about the I2C serial bus, refer to the I 2C Handbook, Philips order number 9397 750 00013). TYPE OF ADDRESS PHYSICAL ADDRESS (MSB to LSB) Command 0011 011 (binary) Data 0011 010 (binary) Protocol 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 I2C interface on the PDIUSBH12 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. 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 PDIUSBH12. 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. 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 PDIUSBH12 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. 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 PDIUSBH12 and the controller. Repeated start support allows another packet to be sent without generating a Stop Condition. Timing The I2C interface in the PDIUSBH12 can support clock speeds up to 1MHz. 1999 Jul 22 9 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 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 Hub D0h Write 1 byte Embedded Function 1 D1h Write 1 byte Embedded Function 6 D2h Write 1 byte Embedded Function 7 D3h Write 1 byte Set Endpoint Enable Hub + Embedded Functions D8h Write 1 byte Set Mode Hub + Embedded Functions F3h Write 2 bytes Data Flow Commands Read Interrupt Register Select Endpoint Read Last Transaction Status Read Endpoint Status Hub Control OUT F4h Read 2 bytes 00h Read 1 byte (optional) Hub Control IN 01h Read 1 byte (optional) Other Endpoints 00h + Endpoint Index Read 1 byte (optional) Hub Control OUT 40h Read 1 byte Hub Control IN 41h Read 1 byte Other Endpoints 40h + Endpoint Index Read 1 byte Hub Control OUT 80h Read 1 byte Hub Control IN 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 Hub Control OUT 40h Write 1 byte Hub Control IN 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 Port 2 E0h Write 1 byte Port 3 E1h Write 1 byte Port 2 E8h Write 1 byte Port 3 E9h Write 1 byte Port 2 E0h Read 1 or 2 bytes Port 3 E1h Read 1 or 2 bytes F7h Write 1 byte Send Resume F6h None Read Current Frame Number F5h Read 1 or 2 bytes Hub Commands Clear Port Feature Set Port Feature Get Port Status Set Status Change Bits General Commands 1999 Jul 22 10 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 COMMAND DESCRIPTIONS Set Endpoint Enable Command Procedure Command : D8h There are four basic types of commands: Initialization, Data, Hub Specific, and General commands. Respectively, these are used to 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. Data : Write 1 byte The hub’s interrupt endpoint and the embedded functions generic endpoints can only be enabled when the corresponding hub/function is enabled via the Set Address/Enable command. Initialization Commands 7 X 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. 6 X 5 X 4 X 3 0 2 0 1 0 0 0 POWER ON VALUE HUB’S INTERRUPT ENDPOINT EMBEDDED FUNCTION 1 GENERIC ENDPOINTS EMBEDDED FUNCTION 6 GENERIC ENDPOINTS EMBEDDED FUNCTION 7 GENERIC ENDPOINTS Set Address / Enable Command : D0h (Hub), D1h, D2h, D3h, (Embedded Functions) Data : Write 1 byte RESERVED SV00841 This command is used to set the USB assigned address and enable the hub or embedded functions respectively. The hub powers up enabled and needs not be enabled by the firmware at power up initialization. 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 Hub’s Interrupt Endpoint A value of ‘1’ indicates the hub’s interrupt endpoint is enabled. Embedded Function 1 Generic Endpoint A value of ‘1’ indicates the embedded function 1 generic endpoints are enabled. Embedded Function 6 Generic Endpoint A value of ‘1’ indicates the embedded function 6 generic endpoints are enabled. Embedded Function 7 Generic Endpoint A value of ‘1’ indicates the embedded function 7 generic endpoints are enabled. POWER ON VALUE ADDRESS ENABLE SV00825 Address The value written becomes the address. Set Mode Enable A ‘1’ enables this function. Command : F3h Data : Write 2 bytes The Set Mode command is followed by two data writes. The first byte contains the configuration byte values. The second byte is the clock division factor byte. 1999 Jul 22 11 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 Connect Downstream Resistors A ‘1’ indicates that downstream resistors are connected. A ‘0’ means that downstream resistors are not connected. The programmed value will not be changed by a bus reset. Configuration Byte 7 1 6 0 5 0 4 0 3 1 2 1 1 0 0 1 POWER ON VALUE REMOTE WAKEUP NO LAZYCLOCK CLOCK RUNNING Non-blinking LEDs A ‘1’ indicates that GoodLink LEDs will NOT blink when there is traffic. Leave this bit at ‘0’ to achieve blinking LEDs. The programmed value will not be changed by a bus reset. Embedded Function Mode A ‘1’ indicates single embedded function mode. A ‘0’ indicates multiple (3) embedded function mode. See endpoint descriptions for details. The programmed value will not be changed by a bus reset. DEBUG MODE SoftConnect CONNECT DOWNSTREAM RESISTORS NON-BLINKING LEDs EMBEDDED FUNCTION MODE SV00842 Remote Wakeup A ‘1’ indicates that a remote wakeup feature is ON. Bus reset will set this bit to ‘1’. No LazyClock A ‘1’ indicates that CLKOUT will not switch to LazyClock. A ‘0’ indicates that the CLKOUT switches to LazyClock 1ms after the Suspend pin goes high. LazyClock frequency is 30KHz (± 40%). The programmed value will not be changed by a bus reset. Clock Running A ‘1’ indicates that the internal clocks and PLL are always running even during Suspend state. A ‘0’ indicates that the internal clock, crystal oscillator and PLL are stopped whenever not needed. To meet the strict Suspend current requirement, this bit needs to be set to ‘0’. The programmed value will not be changed by a bus reset. Debug Mode A ‘1’ indicates that all errors and “NAKing” are reported and a ‘0’ indicates that only OK and babbling are reported. The programmed value will not be changed by a bus reset. SoftConnect A ‘1’ indicates that the upstream pull-up resistor will be connected if VBUS is available. A ‘0’ means that the upstream resistor will not be connected. The programmed value will not be changed by a bus reset. 1999 Jul 22 Clock Division Factor Byte 7 X 6 X 5 0 4 0 3 0 2 0 1 1 0 1 POWER ON VALUE FOR 48MHz INPUT X X 1 1 1 0 1 1 POWER ON VALUE FOR 12MHz INPUT CLOCK DIVISION FACTOR RESERVED SV00843 Clock Division Factor 12 The value indicates clock division factor for CLKOUT. The output frequency is 48 MHz/(N+1) where N is the Clock Division Factor. The reset value is 3. This will give a default output frequency at CLKOUT pin of 12 MHz, thus maintaining backward compatibility to the PDIUSBH11. When the 12 MHz input crystal frequency is selected, the reset value is 11. This will produce the lowest output frequency of 4 MHz which can then be programmed up by the user. The PDIUSBH12 design ensures no glitching during frequency change. The programmed value will not be changed by a bus reset. Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 Data Flow Commands Select Endpoint Data flow commands are used to manage the data transmission between the USB endpoints and the monitor. Much of the data flow is initiated via an interrupt to the microcontroller. The microcontroller utilizes these commands to access and determine whether the endpoint FIFOs have valid data. : F4h Data : Read 2 bytes : 00-0Dh Data : Optional Read 1 byte The Select Endpoint command initializes an internal pointer to the start of the Selected buffer. Optionally, this command can be followed by a data read, which returns ‘0’ if the buffer is empty and ‘1’ if the buffer is full. Read Interrupt Register Command Command 7 X Interrupt Register Byte 1 7 0 6 0 5 0 4 0 3 0 2 0 1 0 6 X 5 X 4 X 3 X 2 X 1 X 0 0 POWER ON VALUE FULL/EMPTY 0 0 RESERVED POWER ON VALUE ENDPOINT INDEX 0 (HUB CONTROL OUT) SV00831 ENDPOINT INDEX 1 (HUB CONTROL IN) Full/Empty ENDPOINT INDEX 2 A ‘1’ indicates the buffer is full, ‘0’ indicates an empty buffer. ENDPOINT INDEX 3 ENDPOINT INDEX 4 ENDPOINT INDEX 5 Read Last Transaction Status ENDPOINT INDEX 6 Command : 40–4Dh Data : Read 1 byte ENDPOINT INDEX 7 SV00844 The Read Last Transaction Status command is followed by one data read that returns the status of the last transaction of the endpoint. This command also resets the corresponding interrupt flag in the interrupt register, and clears the status, indicating that it was read. Interrupt Register Byte 2 7 X 6 0 5 0 4 0 3 0 2 0 1 0 0 0 POWER ON VALUE This command is useful for debugging purposes. Since it keeps track of every transaction, the status information is overwritten for each new transaction. ENDPOINT INDEX 8 ENDPOINT INDEX 9 ENDPOINT INDEX 10 ENDPOINT INDEX 11 7 0 ENDPOINT INDEX 12 6 0 5 0 4 0 3 0 2 0 1 0 0 0 POWER ON VALUE ENDPOINT INDEX 13 DATA RECEIVE/TRANSMIT SUCCESS BUS RESET ERROR CODE (SEE TABLE) RESERVED SV00845 SETUP PACKET DATA 0/1 PACKET This command indicates the origin of an interrupt. A ‘1’ indicates an interrupt occurred at this endpoint. The bits are cleared by reading the endpoint status register through Read Endpoint Status command. PREVIOUS STATUS NOT READ SV00832 Data Receive/Transmit Success A ‘1’ indicates data has been received or transmitted successfully. Error Code See Table 3, Error Codes. Setup Packet The bus reset interrupt is internally cleared by reading the interrupt register. A bus reset is completely identical to the hardware reset through the RESET_N pin with the sole difference of interrupt notification. A ‘1’ indicates the last successful received packet had a SETUP token (this will always read ‘0’ for IN buffers. Data 0/1 Packet A ‘1’ indicates the last successful received or sent packet had a DATA1 PID. The hub interrupt endpoint is handled internally by the PDIUSBH12 hardware without the need of microcontroller intervention. Previous Status not Read A ‘1’ indicates a second event occurred before the previous status was read. After a bus reset an interrupt will be generated and bit 6 of the Interrupt Register Byte 2 will be ‘1’. [In the PDIUSBH11, the bus reset event is indicated by the absence of a ‘1’ in any bit of the Interrupt Register. Note that the backward compatibility is still maintained because in the PDIUSBH11, the Interrupt Register Byte 2 does not exist.] 1999 Jul 22 13 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 Table 3. Error codes Read Buffer ERROR CODE RESULT 0000 No Error 0001 PID encoding Error; bits 7–4 are not the inversion of bits 3–0 0010 PID unknown; encoding is valid, but PID does not exist 0011 Unexpected packet; packet is not of the type expected (= token, data or acknowledge), or SETUP token to a non-control endpoint 0100 Token CRC Error 0101 Data CRC Error 0110 Time Out Error 0111 Babble Error 1000 Unexpected End-of-packet 1001 Sent or received NAK 1010 Sent Stall, a token was received, but the endpoint was stalled 1011 Overflow Error, the received packet was longer than the available buffer space 1101 Bitstuff Error 1111 • byte 0: • byte 1: • byte 2: • byte 3: Data : Read 1 byte 3 0 2 0 Reserved: can have any value Number/length of data bytes Data byte 1 Data byte 2 Write Buffer Command : F0h Data : Write multiple bytes (max 10) The Write Buffer command is followed by a number of data writes, which load the endpoints buffer. The data must be organized in the same way as described in the Read Buffer command. The first byte (reserved) should always be 0. As in the Read Buffer command, the data can be split up into different I2C data transactions. : 80–8Dh 4 0 : Read multiple bytes (max 10) The data in the buffer are organized as follows: Command 5 0 Data The buffer pointer is not reset to the buffer start by the Read Buffer command. This means that reading or writing a buffer can be interrupted by any other command (except for Select Endpoint), or can be done by more than one I2C transaction (read the first 2 bytes to get the number of data bytes, then read the rest in other transactions). Read Endpoint Status 6 X : F0h The Read Buffer command is followed by a number of data reads, which return the contents of the selected endpoint data buffer. After each read, the internal buffer pointer is incremented by 1. Wrong DATA PID; the received DATA PID was not the expected one 7 X Command 1 X 0 X WARNING: There is no protection against writing or reading over a buffer’s boundary or against writing into an OUT buffer or reading from an IN buffer. Any of these actions could cause an incorrect operation. Data in an OUT buffer are only meaningful after a successful transaction. POWER ON VALUE RESERVED SETUP PACKET Clear Buffer STALL Command : F2h Data : None DATA 0/1 PACKET BUFFER FULL RESERVED Setup Packet A ‘1’ indicates the last received packet had a SETUP token. When a packet is received completely, an internal endpoint buffer full flag is set. All subsequent packets will be refused by returning a NAK. When the microcontroller has read the data, it should free the buffer by the Clear Buffer command. When the buffer is cleared new packets will be accepted. STALL A ‘1’ indicates the endpoint is stalled. Validate Buffer SV00833 Data 0/1 Packet A ‘1’ indicates if the last received or sent packet had a DATA1 PID. Buffer Full A ‘1’ indicates that the buffer is full. 1999 Jul 22 Command : FAh Data : None When the microprocessor has written data into an IN buffer, it should set the buffer full flag by the Validate Buffer command. This indicates that the data in the buffer are valid and can be sent to the host when the next IN token is received. 14 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 Set Endpoint Status Hub Commands Command : 40–4Dh Data : Write 1 byte Hub commands are used to report connectivity and power status between the hub and the host. These commands allow the host to enable each port individually and get any change of status such as new connectivity information. A stalled control endpoint is automatically unstalled when it receives a SETUP token, regardless of the content of the packet. If the endpoint should stay in its stalled state, the microcontroller can re-stall it. Clear/Set Port Feature Command : E0–E1h (Clear) and E8h–E9h (Set) When a stalled endpoint is unstalled (either by the Set Endpoint Status command or by receiving a SETUP token), it is also re-initialized. This flushes the buffer and if it is an OUT buffer it waits for a DATA 0 PID, if it is an IN buffer it writes a DATA 0 PID. Data : Write 1 byte Even when unstalled, writing Set Endpoint Status to ‘0’ initializes the endpoint. When the controller receives a Set Feature or a Clear Feature request, there are two possibilities: The data written in the data phase is the feature code described in Table 4. The request applies to port 1, the embedded port. In this case the request should be handled internally by the controller. 7 X 6 X 5 X 4 X 3 X 2 X 1 X 0 0 If the request applies to ports 2 and 3, the controller should translate the request into a Set Feature or Clear Feature command towards the PDIUSBH12. POWER ON VALUE STALLED RESERVED When the PDIUSBH12 is configured in mode 0, there is only one power switch output and one overcurrent input. This means that the F_PORT_POWER and C_PORT_OVERCURRENT features are not port specific. For these features, any of the Set / Clear Feature commands can be used. The specific port assignment is ignored. SV00834 Stalled A ‘1’ indicates the endpoint is stalled. When the PDIUSBH12 is configured in mode 1, there is still only one power switch output but there are two individual overcurrent input pins corresponding to each port. This means that the F_PORT_POWER feature is port specific and the C_PORT_OVERCURRENT feature is not port specific. Acknowledge Setup Command : F1h Data : None Setting the F_PORT_POWER feature turns the power on when it is off and turns the overcurrent detection on only when the power is already on. This allows it to have a short period of overcurrent condition at the moment that power is switched on. For this reason, the F_PORT_POWER feature needs to be set twice. Clearing this feature turns both the power and the overcurrent detection off. The arrival of a SETUP packet flushes the IN buffer and disables the Validate Buffer and Clear Buffer commands for both IN and OUT endpoints. The microcontroller needs to re-enable these commands by the Acknowledge Setup command. This ensures that the last SETUP packet stays in the buffer and no packet can be sent back to the host until the microcontroller has acknowledged explicitly that it has seen the SETUP packet. The microcontroller must send the Acknowledge Setup command to both the IN and OUT endpoints. Table 4. FEATURE FEATURE CODE SET CLEAR F_PORT_ENABLE 0 Enables a port Disables a port F_PORT_SUSPEND 1 Suspends a port Resumes a port FC_PORT_RESET 2 Resets a port Clears a port Reset Change bit F_PORT_POWER 3 Powers all ports Unpowers all ports C_PORT_CONNECTION 4 – Clears a port Connection Change bit C_PORT_ENABLE 5 – Clears a port Enable Change bit C_PORT_SUSPEND 6 – Clears a port Suspend Change bit C_PORT_OVERCURRENT 7 – Clears a port (Mode 1) or hub (Mode 0) Overcurrent Change bit 1999 Jul 22 15 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 Port Status Change Byte The description for the Port Status Change Byte is similar to the Port Status Byte except that the value of the bits are ‘1’ only when a change has occurred. Get Port Status Command : E0h–E1h Data : Read 1 or 2 bytes 7 X The Get Port Status Command can be followed by one or two data reads. The first byte returned contains the port status. The second byte returned is the port status change byte. 6 X 5 X 4 0 3 0 2 0 1 0 0 0 POWER ON VALUE CONNECT ENABLED Port Status Byte SUSPEND 7 X 6 0 5 0 4 0 3 0 2 0 1 0 0 0 OVERCURRENT POWER ON VALUE RESET CONNECT RESERVED ENABLED SUSPEND SV00847 OVERCURRENT RESET Set Status Change Bits POWER LOW SPEED Command : F7h Data : Write 1 byte RESERVED SV00846 Connect A ‘1’ indicates that a device is connected on this port of the hub. Enabled A ‘1’ indicates that this port is enabled. Suspend A ‘1’ indicates that this port is suspended. OverCurrent A ‘1’ indicates that overcurrent condition exists on this port. In mode 0 of operation, this bit is the same for all ports. In mode 1, individual port overcurrent indication is possible. Reset Power Low Speed 1999 Jul 22 For assembling the hub’s status change register, the device needs some additional information from the controller, i.e. the Local Power Status Change bit and the embedded function Status Change bit. These are provided by the Set Status Change Bits command. This command is always followed by one data write which contains the Local Power Status Change bit at the LSB and the embedded function Status Change bit at position 1. All other bits should be 0. 7 X 6 X 5 X 4 X 3 0 2 0 1 0 0 0 POWER ON VALUE A ‘1’ indicates that bus reset on this port is in progress. When reset is completed (nominal duration of 10 ms), this bit indicates a ‘0’. LOCAL POWER A ‘1’ indicates that power is supplied to downstream ports. Since the PDIUSBH12 supports gang mode power switching, this bit is the same for all ports. EMBEDDED FUNCTION 7 EMBEDDED FUNCTION 1 EMBEDDED FUNCTION 6 RESERVED SV00848 A ‘1’ indicates that low speed device is connected to this port. This bit is only valid when Connect bit is a ‘1’. 16 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 General Commands Host Requests SetFeature PORT_RESET Send Resume Command : F6h Data : None Reinitialize the embedded function and set the Reset Change bit to indicate that the reset has completed. Reset the Enable Status bit, enable the embedded function and set its address to ‘0’ by the Set embedded function Address / Enable command. Disable the embedded function interrupt endpoint by the Set Endpoint Enable command. Sends an upstream resume signal for 10 ms. This command is normally issued when the device is in suspend. The RESUME command is not followed by a data read or write. SetFeature PORT_ENABLE The PDIUSBH12 automatically sends a RESUME command when an event occurs downstream. Enable the function by the Set embedded function Address/Enable command. Set the Enable Status bit. Read Current Frame Number SetFeature PORT_SUSPEND Command : F5h Data : Read One or Two Bytes Disable the function by the Set embedded function Address/Enable command. Reset the Enable Status bit and set the Suspend Status bit. This command is followed by one or two data reads and returns the frame number of the last successfully received SOF. The frame number is returned Least Significant Byte first. ClearFeature PORT_ENABLE Disable the function by the Set embedded function Address / Enable command. Reset the Enable Status bit. ClearFeature PORT_SUSPEND 7 X 6 X 5 X 4 X 3 X 2 X 1 X 0 X LEAST SIGNIFICANT BYTE 7 X 6 X 5 X 4 X 3 X 2 X 1 X 0 X MOST SIGNIFICANT BYTE Enable the function by the Set embedded function Address / Enable command. Set the Enable Status bit, reset the Suspend Status bit; set the Resume Status Change bit to indicate that the resume has completed. ClearFeature any Change Indicator SV00835 Clear the corresponding status change bit. Embedded Function Babbling condition The USB host sees no difference between the embedded function and a function connected to one of the downstream ports. Some of the port commands sent by the host must be handled appropriately by the embedded function to appear as any other downstream port. When the embedded function causes a babbling condition, the function is automatically disabled by the PDIUSBH12. As soon as the microcontroller detects the babbling error, it must set the Enable Status Change bit and reset the Enable Status bit. The microcontroller maintains a series of status and status change bits for the embedded function as described in the Get Port Status command section. From these bits, the Status Change bit for the embedded function is derived (i.e. the port specific Status Change bits). This Status Change bit is then provided to the PDIUSBH12 by the Set Status Change Bits command. Remote WakeUp There are three scenarios when a remote wakeup can occur. The following describes the course of actions for each of the cases: 1. The device is not suspended and the embedded port is suspended: Enable back the function by setting the enable bit in the Set Address/Enable register and update the following status bits in the microcontroller program: reset the Suspend Status bit, set the Enable Status bit and set the Suspend Status Change bit. 2. The device is suspended and the embedded port is suspended: Send an upstream Resume using the Send Resume command, enable back the function by setting the enable bit in the Set Address/Enable register and update the following status bits in the microcontroller program: reset the Suspend Status bit, set the Enable Status bit and set the Suspend Status Change bit. 3. The device is suspended and the embedded port is enabled: Send an upstream resume using the Send Resume command. 1999 Jul 22 17 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 RECOMMENDED OPERATING CONDITIONS SYMBOL VCC PARAMETER TEST CONDITIONS MIN MAX UNIT 3.0 3.6 V DC input voltage range 0 5.5 V VI/O DC input voltage range for I/O 0 5.5 V VAI/O DC input voltage range for analog I/O 0 VCC V DC output voltage range 0 VCC V –40 85 °C VI VO Tamb DC supply voltage Operating ambient temperature range in free air See DC and AC characteristics per device ABSOLUTE MAXIMUM RATINGS1 PARAMETER SYMBOL VCC TEST CONDITIONS DC supply voltage IIK DC input diode current VI < 0 VI DC input voltage Note 2 VI/O DC input voltage range for I/O’s IOK DC output diode current VO > VCC or VO < 0 VO DC output voltage Note 2 IO DC output sink or source current for other pins VO = 0 to VCC IO DC output sink or source current for D+/D– pins VO = 0 to VCC IGND, ICC MIN MAX UNIT –0.5 +4.6 V –50 mA –0.5 +5.5 V –0.5 VCC + 0.5 V ±50 mA –0.5 Electrostatic discharge voltage TSTG Storage temperature range PTOT Power dissipation per package V ±15 mA ±50 mA ±100 DC VCC or GND current VESD VCC + 0.5 IIL < 1 µA 3 — –60 ±4000 +150 mA 4 V °C NOTES: 1. Stresses beyond those listed may cause damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those listed in the RECOMMENDED OPERATING CONDITIONS table is not implied. Exposure to absolute maximum rated conditions for extended periods may affect device reliability. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 3. Values are given for device only: in-circuit VESD(MAX) = ±8000 V. 4. For open-drain pins VESD(MAX) = ±2000 V. 1999 Jul 22 18 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 DC CHARACTERISTICS (Digital pins) SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 0.6 V Input Levels VIL LOW level input voltage VIH HIGH level input voltage 2.7 V VTLH LOW to HIGH threshold voltage ST (Schmitt Trigger) pins 1.4 1.9 V VTHL HIGH to LOW threshold voltage ST pins 0.9 1.5 V VHYS Hysteresis voltage ST pins 0.4 0.7 V 0.4 0.1 V V Output Levels VOL LOW level out output ut voltage IOL = rated drive IOL = 20 µA VOH HIGH level output out ut voltage IOH = rated drive IOH = 20 µA V V 2.4 VCC – 0.1 Leakage Current IOZ IL OFF state current OD (Open Drain) pins Input leakage current IS Suspend current Oscillator stopped and inputs to GND/VCC IO Operating current 02 ports operating ±1 µA ±1 µA 15 µA 13 mA DC CHARACTERISTICS (AI/O pins) SYMBOL PARAMETER TEST CONDITIONS MIN MAX UNIT ±10 µA Leakage Current ILO Hi-Z state data line leakage 0V < VIN < 3.3V VDI Differential input sensitivity |(D+) – (D–)|1 0.2 VCM Differential common mode range Includes VDI range 0.8 2.5 V VSE Single-ended receiver threshold 0.8 2.0 V 0.3 V 3.6 V 20 pF Input Levels V Output Levels VOL Static output LOW RL of 1.5kΩ to 3.6V VOH Static output HIGH RL of 15kΩ to GND Transceiver capacitance Pin to GND 2.8 Capacitance CIN Output Resistance ZDRV2 Driver output resistance Steady state drive 28 43 Ω Integrated Resistance ZPU Pull-up resistance SoftConnect = ON 1.1 1.9 kΩ ZPD Pull-down resistance Pull-down = ON 11 19 kΩ NOTES: 1. D+ is the symbol for the USB positive data pin: UP_DP, DN2_DP, DN3_DP. D– is the symbol for the USB negative data pin: UP_DM, DN2_DM, DN3_DM. 2. Includes external resistors of 22 W ± 1% each on D+ and D–. LOAD FOR D+/D– 1.5kΩ IS INTERNAL TEST POINT 22Ω D. U. T. 15kΩ CL = 50pF SV00849 1999 Jul 22 19 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 AC CHARACTERISTICS (AI/O pins, FULL speed) SYMBOL PARAMETER Driver characteristics tr tf Transition Time: Rise time Fall time tRFM Rise/fall time matching VCRS Output signal crossover voltage TEST CONDITIONS MIN MAX UNIT 4 4 20 20 ns ns CL = 50pF; Rpu = 1.5kΩ on D+ to VCC Between 10% and 90% (tr/tf) 90 110 % 1.3 2.0 V Driver Timings tEOPT Source EOP width Figure 1 160 175 ns tDEOP Differential data to EOP transition skew Figure 1 –2 5 ns –18.5 –9 18.5 9 ns ns Receiver Timings tJR1 tJR2 tEOPR1 tEOPR2 Receiver Data Jitter Tolerance To next transition For paired transitions EOP Width at Receiver Must reject as EOP Must accept Hub Timings Characterized and not tested. Guaranteed by design. Figure 1 Hub Differential Data Delay Figure 2 tSOP Data bit width distortion after SOP Figure 2 Hub EOP Delay Relative to tHDD Figure 3 Hub EOP Output Width Skew Figure 3 tHESK 1999 Jul 22 ns ns Full Speed downstream port. tHDD tEOPDR 40 82 20 40 ns –5 3 ns 0 15 ns –15 +15 ns Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 AC CHARACTERISTICS (AI/O pins, LOW speed) SYMBOL PARAMETER Transition Time tlff tRFM VLCRS MIN MAX UNIT CL = 50pF and 350pF; Rpu = 1.5kΩ on D– to VCC Driver characteristics tlr TEST CONDITIONS Between 10% and 90% CL = 50pF Rise time 75 CL = 350pF CL = 50pF Fall time 75 CL = 350pF Rise/fall time matching ns 300 (tr/tf) Output signal crossover voltage ns ns 300 ns 80 120 % 1.3 2.0 V Driver Timings tLEOPT Source EOP width Figure 1 1.25 1.50 µs tLDEOP Differential data to EOP transition skew Figure 1 –40 100 ns Receiver Timings EOP Width at Receiver tLEOPR1 Must reject as EOP tLEOPR2 Must accept Figure 1 Hub Timings ns 675 ns Low Speed downstream port. tLHDD Hub Differential Data Delay Figure 2 tLSOP Data bit width distortion after SOP Figure 2 tLEOPDR Hub EOP Delay Relative to THDD Figure 3 Hub EOP Output Width Skew Figure 3 tLHESK 330 300 ns 45 ns 0 200 ns –300 +300 ns –65 tPERIOD CROSSOVER POINT EXTENDED CROSSOVER POINT DIFFERENTIAL DATA LINES SOURCE EOP WIDTH: tEOPT DIFFERENTIAL DATA TO SEO/EOP SKEW N * tPERIOD + tDEOP RECEIVER EOP WIDTH: tEOPR1, tEOPR2 SV00837 Figure 1. Differential data to EOP transition skew and EOP width 1999 Jul 22 21 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 VDD CROSSOVER POINT CROSSOVER POINT DOWNSTREAM DIFFERENTIAL DATA UPSTREAMDIFFERENTIAL DATA VSS CROSSOVER POINT Hub Delay Downstream tHDD DOWNSTREAMDIFFERENTIAL DATA CROSSOVER POINT Hub Delay Upstream tHDD UPSTREAM DIFFERENTIAL DATA VSS A. DOWNSTREAM HUB DELAY B. UPSTREAM HUB DELAY SOP DISTORTION tSOP = tHDD(SOP) – tHDD (NEXT J) LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR: tLHDD AND tLSOP SV00514 Figure 2. Hub Differential Data Delay and SOP distortion VDD DOWNSTREAM PORT CROSSOVER POINT EXTENDED UPSTREAMDIFFERENTIAL DATA CROSSOVER POINT EXTENDED VSS tEOP– tEOP+ tEOP– CROSSOVER POINT EXTENDED DOWNSTREAMDIFFERENTIAL DATA tEOP+ CROSSOVER POINT EXTENDED UPSTREAM END OF CABLE VSS A. DOWNSTREAM EOP DELAY B. UPSTREAM EOP DELAY EOP DELAY tEOPD = tEOP– EOP DELAY RELATIVE TO tHDD tEOPDR = tEOPD – tHDD EOP SKEW tHESK = tEOP+ – tEOP– LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR: tLEOPD, tLEOPDR, AND tLHESK SV00515 Figure 3. Hub EOP Delay and EOP Skew 1999 Jul 22 22 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 AC CHARACTERISTICS (I2C pins) All timing values are valid within the operating supply voltage and ambient temperature range and reference to VIL and VIH with an input voltage swing of VSS and VDD. PARAMETER SYMBOL TEST CONDITIONS MIN MAX UNIT 1000 kHz fSCL SCL clock frequency tBUF Bus free time 0.5 µs tSU;STA Start condition set-up time 0.25 µs tHD;STA Start condition hold time 0.25 µs tLOW SCL LOW time 0.45 µs tHIGH SCL HIGH time 0.45 µs tr SCL and SDA rise time tf SCL and SDA fall time tSU;DAT Data set-up time tHD;DAT Data hold time tVD;DAT SCL LOW to data out valid tSU;STO Stop condition set-up time 0.3 µs 0.1 µs 100 ns 0 ns 0.4 µs µs 0.25 A detailed description of the I2C-bus specification, with applications, is given in the brochure “The I 2C-bus and how to use it”. This brochure may be ordered using the Philips order number 9398 393 40011. PROTOCOL BIT 7 MSB (A7) START CONDITION (S) tSU;STA tLOW BIT 0 LSB (R/W) BIT 6 (A6) ACKNOWLEDGE (A) STOP CONDITION (P) tHIGH 1/fSCL SCL tr tBUF tf SDA tHD;STA tSU;DAT tHD;DAT tVD:DAT tSU;STO SV00756 Figure 4. 1999 Jul 22 I2C-bus 23 timing diagram Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 SO28: plastic small outline package; 28 leads; body width 7.5mm 1999 Jul 22 24 SOT136-1 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 DIP28: plastic dual in-line package; 28 leads (600 mil) 1999 Jul 22 25 SOT117-1 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 SOLDERING Introduction This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “Data Handbook IC26; Integrated Circuit Packages” (document order number 9398 652 90011). 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. There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mount components are mixed on one printed circuit board. However, wave soldering is not always suitable for surface mount ICs, or for printed-circuit boards with high population densities. In these situations, reflow soldering is often used. 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 Through-hole mount packages with high upward pressure followed by a smooth laminar wave. • For packages with leads on two sides and a pitch (e): SOLDERING BY DIPPING OR BY SOLDER WAVE – larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be parallel to the transport direction of the printed-circuit board; The maximum permissible temperature of the solder is 260°C; solder at this temperature must not be in contact with the joints for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. – smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the transport direction of the printed-circuit board. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg(max)). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. The footprint must incorporate solder thieves at the downstream end. • For packages with leads on four sides, the footprint must be placed at a 45° angle to the transport direction of the printed-circuit board. The footprint must incorporate solder thieves downstream and at the side corners. MANUAL SOLDERING Apply the soldering iron (24 V or less) to the lead(s) of the package, either below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300°C, it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400°C, contact may be made for up to 5 seconds. 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 has cured. Surface mount packages Typical dwell time is 4 seconds at 250°C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. 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. 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. Several methods exist for reflowing; for example, infrared/convection heating in a conveyor-type oven. Throughput times (preheating, soldering and cooling) vary between 100 and 200 seconds, depending on heating method. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320°C. Typical reflow peak temperatures range from 215 250°C. The top-surface temperature of the packages should preferably be kept below 230°C. 1999 Jul 22 26 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 SUITABILITY OF IC PACKAGES FOR WAVE, REFLOW AND DIPPING SOLDERING METHODS Soldering Method Mo nting Mounting Through-hole mount Package DBS, DIP, HDIP, SDIP, SIL BGA, SQFP, HLQFP, HSQFP, HSOP, SMS Surface mount PLCC, SO, SOJ LQFP, QFP, TQFP SSOP, TSSOP, VSO Reflow 1 Dipping suitable 2 – suitable not suitable suitable – suitable – Wave not suitable 3 suitable suitable – not recommended 4, 5 suitable – not recommended 6 suitable – NOTES: 1. All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum temperature (with respect to time) and body size of 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 “Data Handbook IC26; Integrated Circuit Packages; Section: Packing Methods”. 2. For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board. 3. These packages are not suitable for wave soldering as a solder joint between the printed-circuit board and heatsink (at bottom version) cannot be achieved, and as solder may stick to the heatsink (on top version). 4. If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave direction. The package footprint must incorporate solder thieves downstream and at the side corners. 5. Wave soldering is only suitable for LQFP, QFP, and TQFP packages with a pitch (e) equal to or larger than 0.8 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm. 6. Wave soldering is only suitable for SSOP and TSSOP packages with a pith (e) equal to or larger than 0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm. 1999 Jul 22 27 Philips Semiconductors Product specification USB 2-port hub PDIUSBH12 Data sheet status Data sheet status Product status Definition [1] Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product specification Production This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. [1] Please consult the most recently issued datasheet before initiating or completing a design. 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 134). 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. 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, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license 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. Copyright Philips Electronics North America Corporation 1999 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 Date of release: 07-99 Document order number: 1999 Jul 22 28 9397 750 06221