Download PDFAT43312 ATMEL
Document overview
- Manufacturer or author: Provided By digicamel.com
- PDF pages: 21
Technical content
Features
- Full compliance with USB spec Rev 1.0
- Four downstream ports
- Full speed and low speed data transfers
- Self-Powered or Bus-Powered modes of operation
- Per port overcurrent monitoring
- Individual port power switch control
- USB connection status indicators
Description
The AT43312 is a 5 port USB hub chip supporting one upstream and four downstream ports. The AT43312 connects to an upstream hub or Host/Root Hub via Port0 and the other ports connect to external downstream USB devices. The hub re-transmits the USB differential signal between Port0 and Ports[1:4] in both directions. A USB hub with the AT43312 can operate as a bus-powered or self-powered through chip’s power mode configuration pin. The AT43312 is pin- and function-compatible with the AT43311 and can be used as a replacement for the AT43310 with one pin modifica- tion. The AT43312 supports the 12 Mb/s full-speed as well as 1.5 Mb/s slow-speed USB transactions. To reduce EMI, the AT43312’s oscillator frequency is 6 MHz even though some internal circuitry operates at 48 MHz. Self- and Bus- Powered USB Hub Controller AT43312 Rev. 1002A-A–01/98 Pin Configurations SOIC/DIP PWR2 PWR3 PWR4 VCC5 GND OSC1 OSC2 LFT VCCA OVL4 OVL3 OVL2 OVL1 VREF BUS/SELF STAT4 PWR1 DP4 DM4 DP3 DM3 GND DP2 DM2 VCC3 DP1 DM1 DP0 DM0 STAT1 STAT2 STAT3
Serial Bus Specification Version 1.0, January 19, 1996. Figure 1. Device Pins
Note: Signals with a # are active low. Pin Description Pin Description Pin Type Description OSC1 I Oscillator Input. Input to the inverting 6 MHz oscillator amplifier. OSC2 O Oscillator Output. Output of the inverting oscillator amplifier. LFT I PLL Filter. For proper operation of the PLL, this pin should be connected through a 2.2 nF capacitor in parallel with a 100 Ω resistor in series with a 10 nF capacitor to ground (GND) BUS/SELF I Hub Power Mode. Input signal that sets the bus or self-powered mode operation. A high on this pin enables the bus-powered mode, a low the self-powered mode. VREF I Reference Voltage. This is an input pin that should be connected to an external voltage source. VREF is used internally as the reference voltage by the overload protection circuit to decide whether there is a problem with a port’s power. DP0 B Upstream Plus USB I/O. This pin should be connected to V CC through an external 1.5 KΩ pullup resistor. DP0 and DM0 form the differential signal pin pairs connected to the Host Controller or an upstream Hub. DM0 B Upstream Minus USB I/O DP[1:4] B Port Plus USB I/O. This pin should be connected to V SS through an external 15 KΩ resistor. DP[1:4] and DM[1:4] are the differential signal pin pairs to connect downstream USB devices. DM[1:4] B Port Minus USB I/O. This pin should be connected to V SS through an external 15 KΩ resistor. OVC[1:4] I Overcurrent. This is the input signal used to indicate to the A T43312 that an overcurrent is detected at the port. If OVC is asserted, A T43312 will assert the PWRx pin and report the status to the USB Host. PWR[1:4] OD Power Switch. This is an output signal used to enable or disable the external voltage regulator supplying power to a port. PWRx is de-asserted when a power supply problem is detected at OVCx. ST A T[1:4] O Connect Status. This is an output pin indicating that a port is properly connected. ST A Tx is asserted when the port is enabled. VCC3 V 3.3V Power Supply VCC5 V 5V Power Supply VCCA V 5V Analog Power Supply GND V Ground
The Atmel AT43312 is a USB hub controller for use in a standalone hub, as well as an add-on hub for an existing non-USB peripheral such as a PC display monitor or key- board. In addition to supporting the standard USB hub functionality, the AT43312 has additional features to enhance the user friendliness of the hub. USB Ports The AT43312’s downstream ports are standard USB ports. That is, their functionality complies to the USB specification and any USB compliant device can be attached to these ports without any other circuitry or modification. Each port has a port connectivity status pin. Dp And Dm Configuration To match the full-speed cable impedance, 27 Ω series resistors must be connected between each port’s DM and DP pins to their corresponding USB connector. In addition,
15 KΩ pull-down resistors are required at each down-
stream port’s DM and DP pins. Port0 is a full-speed port and requires a 1.5 KΩ pull-up resistor to the 3.3V power supply. This power supply must be derived from the bus supplied power. Port Status Pin The ST A Tx pins are signals that are not required by the USB specification. Their function is to allow the hub to pro- vide feedback to the user whenever a device is properly connected to the port. A LED and series resistor connected to ST Ax can be used to provide a visual feedback. The default state of ST A Tx is inactive. After a port is enabled, AT43312 will assert the port’s ST A Tx. Any condi- tion that causes the port to be disabled inactivates ST A Tx. Hub Repeater The Hub Repeater is responsible for port connectivity setup and tear-down. It also supports exception handling such as bus fault detection and recovery, and connect/disconnect detection. Port0 is the root port and is connected to the root hub or an upstream hub. When a packet is received at Port0, the AT43312 propagates it to all of the enabled downstream ports. Conversely, a packet from a down- stream port is transmitted from Port0. The AT43312 supports downstream port data signaling at both 1.5 Mb/s and 12 Mb/s. Devices attached to the down- stream ports are determined to be either full-speed or low- speed depending on which data line (DP or DM) is pulled high. If a port is enumerated as low speed, its output buff- ers operate at a slew rate of 75-300 ns, and the AT43312 will not propagate any traffic to that port unless it is pref- aced with a preamble PID. Low-speed data following the preamble PID is propagated to both low and full-speed devices. The AT43312 will enable low-speed drivers within four full-speed bit times of the last bit of a preamble PID, and will disable them at the end of an EOP. Packets out of Port0 are always transmitted using the full-speed drivers. All the AT43312 ports independently drive and monitor their DP and DM pins so that they are able to detect and generate the ‘J’, ‘K’, and SE0 bus signaling states. Each hub port has single-ended and differential receivers on its DP and DM lines. The ports I/O buffers comply to the volt- age levels and drive requirements as specified in the USB Specifications Rev 1.0. The Hub Repeater implements a frame timer which is timed by the 12MHz USB clock and gets reset every time a SOF token is received from the Host. Serial Interface Engine The Serial Interface Engine handles the USB communica- tion protocol. It performs the USB clock/data separation, the NRZI data encoding/decoding, bit stuffing, CRC gener- ation and checking, USB packet ID decoding and genera- tion, and data serialization and de-serialization. The on- chip phase locked loop generates the high-frequency clock for the clock/data separation circuit. Power Management A hub is a high-powered device and is allowed to draw up to 500 mA of current from the host or upstream hub. The AT43312 chip itself and its external hub circuitry consume less than 100 mA. The AT43312’s power management logic work with external devices to detect overcurrent and control power to the ports. Overcurrent sensing is on a per port basis and is achieved through the OVCx pins. Each of the OVCx pin is the plus input of an analog comparator whose other input is con- nected to a reference voltage source, VREF which is com- mon to all four ports. Whenever the voltage at OVCx is less than VREF , the AT43312 treats it as an overcurrent condi- tion. This could be caused by an overload, or even a short circuit, and causes the AT43312 to set the port’s PORT_OVER_CURRENT status bit and its C_PORT_OVER_CURRENT status change bit. At the same time, power to the offending port is shut off. An external device is needed to perform the actual switch- ing of the ports’ power under control of the AT43312. The signal to control the external switches are the PWRx pins which are open drain signals and require external pull-up resistors of 10 KΩ . Any type of suitable switch or device is acceptable. However, it should have a low-voltage drop across it even when the port absorbs full power. In its sim- plest form, this switch can be a P-channel MOSFET. The advantages of using a MOSFET switch is its very low volt- age drop and low cost. Each one of the AT43312’s port has its own power control pin which is asserted only when a Set_Port_Feature[PORT-POWER] request is received
supply must be capable of supplying 500 mA per port. condition increases the voltage drop across the MOSFET. and reports the condition to the Host. Figure 2. Self-Powered Hub Power Supply fore only low power devices are supported.
Figure 3. Bus-Powered Hub Power Supply the Hub Controller can apply power to external devices. Register, which reflects the AT43312’s current settings. At power up, all bits in this register will be set to 0’s.
0 Hub configuration status
1 Hub remote wakeup status
Set to 0 or 1 by ClearFeature or SetFeature request. Default value is 0.
2 Endpoint0 ST ALL status 0
3 Endpoint1 ST ALL status 0
Endpoint0 is the AT43312’s default endpoint used for enu- meration of the Hub and exchange of configuration infor- mation and requests between the Host and the AT43312. Endpoint0 supports control transfers. The Hub Controller supports the following descriptors: Device Descriptor, Configuration Descriptor, Interface Descriptor, Endpoint Descriptor, and Hub Descriptor. These Descriptors are described in detail on page 9 through page 16 of this document. Standard USB Device Requests and class-specific Hub Requests are also sup- ported through Endpoint0. There is no endpoint descriptor for Endpoint0. Endpoint1 Endpoint1, an interrupt endpoint, is used by the Hub Con- troller to send status change information to the Host. The Hub Controller samples the changes at the end of every frame at time marker EOF2 in preparation for a potential data transfer in the subsequent frame. The sam- pled information is stored in a byte-wide register, the Status Change Register , using a bitmap scheme. Each bit in the Status Change Register corresponds to one port as shown below: An IN Token packet from the Host to Endpoint1 indicates a request for port change status. If the Hub has not detected any change on its ports, nor any changes in itself, then all bits in this register will be 0 and the Hub Controller will return a NAK to requests on Endpoint1. If any of bits 0-4 is 1, the Hub Controller will transfer the whole byte. The Hub Controller will continue to report a status change when polled until that particular change has been removed by a Clear_Port_Feature request from the Host. No status change will be reported by Endpoint1 until the AT43312 has been enumerated and configured by the Host via Endpoint0. Status Change Register Bit Function Value Meaning
0 Hub status change 0
1 Port1 status change 0
2 Port2 status change 0
3 Port3 status change 0
4 Port4 status change 0
5-7 Reserved 000 Default values
Figure 4. Oscillator and PLL Connections the package pins are recommended.
6.000 MHz
The Hub Controller supports the following standard USB descriptors: Device, Configuration, Interface, and Endpoint Descriptors, as well as the class-specific Hub Descriptor. All the obligatory Standard Requests and Hub Class-Spe- cific Requests are supported by the AT43312’s Hub Con- troller. The description is given for the self-powered mode of operation. Unique parameters for the bus-powered mode is given in case of differences. Device Descriptor The Device Descriptor provides general information about the AT43312 Hub. Offset Field Description Size (bytes) Value 0 bLength Define size of this descriptor = 18 bytes 1 0x12 1 bDescriptorT ype Device descriptor type 1 0x01 2 bcdUSB USB Spec. Release Number = Rev 1.0 2 0x00 0x01 4 bDeviceClass Class code = HUB_CLASSCODE = 09 1 0x09 5 bDeviceSubClass Subclass code 1 0x00 6 bDeviceProtocol Protocol code 1 0x00 7 wMaxPacketSize0 Max. packet size for Endpoint0 = 8 bytes 1 0x08 8 idVendor Vendor ID = Atmel Corporation 2 0xEB 0x03 10 idProduct Product ID = A T43312 2 0x12 0x33 12 bcdDevice Device release number Example : Revision A0 : yy = 0x01, zz = 0x00 Revision B1 : yy = 0x02, zz = 0x01 2 0XZZ 0XYY 14 iManufacturer Index of string descriptor describing manufacturer = not supported 1 0x00 15 iProduct Index of string descriptor describing product = not supported 1 0x00 16 iSerialNumber Index of string descriptor describing device's serial no. = not supported 1 0x00 17 bNumConfigurations Number of possible configurations = 1 1 0x01
This Configuration Descriptor provides information about AT43312’s configuration. Interface Descriptor The Interface Descriptor provides information about the single interface which the AT43312 supports. Offset Field Description Size (bytes) Value 0 bLength Define size of this descriptor = 9 bytes 1 0x09 1 bDescriptorT ype Descriptor type = Configuration 1 0x02 2 wT otalLength T otal length of data returned for this configuration. Consists of the combined length of configuration, interface, endpoint and hub descriptors = 34 bytes 20 x 2 2 0x00 4 bNumInterface Number of interfaces supported by this configuration 1 0x01 5 bConfiguration Value Argument value for this configuration to be used by Set Configuration command 10 x 0 1 6 iConfiguration Index of string descriptor describing this configuration (not supported) 1 0x00 7 bmAttributes Configuration characteristics = Bus and Self-Powered with Remote Wakeup 10 x E 0
8 MaxPower Maximum power consumption of USB device from bus = 100 mA 1 0x32
Bus Powered Mode: Offset Field Description Size (bytes) Value 7 bmAttributes Configuration characteristics = Bus-Powered with Remote Wakeup 1 0xA0
8 MaxPower Maximum power consumption of USB device from bus = 500 mA 1 0xFA
Offset Field Description Size (bytes) Value 0 bLength Define size of this descriptor = 9 bytes 1 0x09 1 bDescriptorT ype Descriptor type = Interface 1 0x04 2 bInterfaceNumber Number of interface = 1, index = 0 1 0x00 3 bAlternatSetting Alternate setting value for the interface identified in the prior field = 0 1 0x00 4 bNumEndpoints Number of endpoints used by this interface = 1 1 0x01 5 bInterfaceClass Class code = HUB_CLASSCODE = 09 1 0x09 6 bInterfaceSubClass Subclass code = 0 1 0x00 7 bInterfaceProtocol Protocol code = 0 1 0x00 8 iInterface Index of string descriptor describing this interface = not supported 1 0x00
There is no endpoint descriptor for Endpoint0. This descriptor describes the Endpoint1 descriptor which the Hub uses for status change report. Hub Descriptor This descriptor describes the AT43312’s Hub and ports. Offset Field Description Size (bytes) Value 0 bLength Size of this descriptor = 7 bytes. 1 0x07 1 bDescriptorT ype Descriptor type = Endpoint 1 0x05 2 bEndpointAddress The address of the IN endpoint 1 0x81 3 bmAttributes T ransfer T ype = Interrupt 1 0x03 4 wMaxPacketSize Max. packet size Endpoint1 is capable of sending = 1 byte 2 0x01 0x00 6 bInterval Interval for polling endpoint for data transfers = 256 ms 1 0xFF Offset Field Definition Size (bytes) Value 0 bDescLength Define size of this descriptor = 9 bytes 1 0x09 1 bDescriptor T ype Descriptor T ype = HUB_DESCRIPTOR = 29 1 0x29 2 bNbrPorts Number of downstream ports = 4 1 0x04 3 wHubCharacteristics Hub's characteristics: = Individual power switching = Hub is not part of a compound device = Individual Port Over-current Protection 20 x 0 9 0x00 5 bPwrOn2PwrGood Time from the time power-on sequence begins on a port until power is good on that port = 100ms. 10 x 3 2 6 bHubContrCurrent Maximum current requirements of the hub electronics = 100 mA. 1 0x64 7 DeviceRemovable Indicates if a port has removeable device. All downstream ports have removable devices. 10 x 0 0 8 PortPwrCtrlMask Indicates if a port is not affected by gang-mode power control request. All the AT43312’s ports require manual SetPortFeature(PORT_POWER) request to control the port’s power state. 10 x 1 E
Standard Requests, or commands, are sent to the AT43312 from the Host on the AT43312's default pipe. These requests are made using control transfers to endpoint0. The request and request parameters are sent in a Setup packet which consists of eight bytes. The following sections describe which requests are supported by the AT43312 and the corresponding responses, as well as those requests not supported and responded with a STALL packet. Please refer to the USB specifications for details about the standard requests. Clear_Feature [Device] Disable remote wakeup feature. Clear_Feature [Interface] Not supported, respond with a STALL. Clear_Feature [Endpoint] Clear an endpoint’s halt status bit if the condition causing the stall has been removed. Get_Configuration Return one byte of data. Bit 0 will be a copy of bit 0 of the Controller_Status Register. All other bits will be set to 0. Get_Descriptor Return the appropriate descriptor. The last word of the Get_Descriptor request specifies the number of bytes AT43312 is to return. If the requested descriptor is longer than the requested number of bytes, AT43312 will return only the requested number of bytes from the top of the descriptor. If the requested descriptor is shorter than the requested number of bytes, then the AT43312 indicates the end of the control transfer by sending a short data packet. Get_Interface The AT43312 has a single interface with a value of 0. If it receives a Get_Interface request with the value of 0x0000 as wIndex (bytes 2), and it will return a single byte with the value 0x00. For any other value of wIndex, the AT43312 will return a STALL. Get_Status [Device] Returns two bytes of data, byte 0 and byte 1, in little endian order Byte 0, Bit 0 = 1, identifying the AT43312 as a self- powered device. Byte 0, Bit 1 = copy of bit 1 of the Controller_Status Register. This bit reflects whether the AT43312’s remote wakeup capability is enabled or dis- abled. All other bits are set to 0. Bus-powered mode: Byte 0, Bit 0 = 0, identifying the AT43312 as a bus-powered device. Get_Status [Interface] Responds with two bytes of data with all 0 value. Get_Status [Endpoint] Responds with two bytes of data. The first bit of the first byte returned reflects the status of the endpoint halt status bits of the Controller Status Register described on page 6. These bits are set or cleared depending whether the end- point is stalled or not : Set_Address Saves the value of bytes 2 and 3 in a temporary buffer, and after successful completion of status stage, it will transfer the value into the Hub_Address Register. This value will be used as the Hub's address in all future transactions. Set_Configuration Sets bit 0 of the Controller_Status Register according to the value of byte 2 of the Setup packet. The AT43312 has only one configuration and it will set the bit only if byte 2 is either 00H or 01H, and bytes 3 to 7 are all zeroes. For any other values, the Hub will respond with a STALL handshake packet. If the value of byte 2 is 1, the AT43312 will be con- figured. If 0, it will go to its unconfigured state. Set_Descriptor Not supported. Will send a STALL handshake packet. Set_Feature [Device] Enables its remote wakeup feature. Set_Feature [Interface] Not supported and will respond with a STALL. Set_Feature [Endpoint] Sets the stall status bit of the Controller Status Register. The stalled endpoint now exhibits the same behavior as in a stall condition. Set_Interface The AT43312 has a single interface and responds with a STALL if a Set_Interface request is received with a value other than 0x0000 as wValue (alternative setting, bytes 2 and 3). Sync_Frame Not supported. Will respond with a STALL packet. Current Endpoint Status First Byte Second Byte Halt 01H 00H Not halt 00H 00H
Hub-specific requests or commands are sent from the Host to the AT43312 using the Default Pipe (associated with Endpoint0). These requests are made using control trans- fers. The request and request parameters are sent in a setup packet consisting of eight bytes. Please refer to the USB specifications for details. Clear_Hub_Feature This request is used by the host to acknowledge local power and hub overcurrent changes. Upon receipt of this request with a wValue = 0, the AT43312 will clear the Local Power Status Change bit. The AT43312 has a per port overcurrent protection and does not report over-current on a global basis. If this request has a wValue = 1, the AT43312 will respond with a STALL. Clear_Port_Feature This request changes the status of a port according to which port feature the request addressess. Not all the pos- sible port features are supported, because some have no meaning. Port features supported by the Clear_Port_Feature request are: PORT_ENABLE, PORT_SUSPEND, PORT_POWER, and all those affecting the port status change bits. A request with an unsupported feature, or if Port0 or a port higher than Port4 is addressed, will cause the hub to respond with a STALL. Get_Bus_State The AT43311 samples the bus states of Ports 1, 2, 3, and 4, at each EOF2 and will store the value in a register known as the Port_Bus_State registers. The value of the D- signal (pin DMx) will be in bit 0 and the value of the D+ signal (DPx) will be in bit 1 of each port’s Port_Bus_State register. All other bits will be 0. The AT43311 responds with a STALL if Port0 or a port higher than Port4 is addressed in this request. Get_Hub_Descriptor Returns the Hub Descriptor. The last word of the Get_Hub_Descriptor request specifies the number of bytes AT43312 is to return. If the requested number of bytes is less than the 9 bytes length of the HubDescriptor, the AT43312 will return only the requested number of bytes from the top of the descriptor. If the requested number of bytes is more than 9, then the returned data will be padded with trailing bytes of zeroes. Get_Hub_Status Returns the current Hub status that has changed since the previous acknowledgment in the form of two words of data. This is described in the following two tables. Word0 is the Hub Status Field, wHubStatus, and Word1 is the Hub Change Field, wHubChange.
Get_Port_Status Returns the current port status and the states that have changed since the previous acknowledgment in the form of two words of data. This is described in the following two tables. Word0 is the Port Status Field, and Word1 is the Port Change Field. The Hub Controller will respond with a STALL if Port0 or a port higher than Port4 is addressed in this request. Hub Status Field, wHubStatus Bit Description 0 Local Power Status, indicates the state of the local power supply. 0 = Local power supply good 1 = Local power supply lost Over-Current Indicator, indicates over-current condition on a global hub basis. A T43312 reports over-current condition on a per port basis therefore this bit is always read as 0. 2-15 Reserved. Always read as 0’s Bus Powered Mode: Bit Description 0 Local Power Status. In the bus-powered configuration, the A T43312 will return a 0 if this bit is read. Hub Change Field, wHubChange Bit Description 0 Local Power Status Change, C_HUB_OVER_POWER, corresponds to bit 0 of wHubStatus. 0 = No change has occurred in local power status 1 = Local power status has changed 1 Over-Current Indicator Change, C_HUB_OVER_CURRENT, corresponds to bit 1 of wHubStatus. A T43312 reports over- current condition on a per port basis and therefore this bit is always read as 0. 2-15 Reserved. Always read as 0’s Bus Powered Mode: Bit Description 0 Local Power Status Change. In the bus-powered configuration, the A T43312 will return as 0 if this bit is read.
Port Status Field, wPortStatus Bit Description
0 Current Connect Status: PORT_CONNECTION
0 = no device present on this port 1 = a device is present on this port
1 Port Enabled/Disabled: PORT_ENABLE
0 = Port is disabled 1 = Port is enabled
2 Suspend: PORT_SUSPEND
0 = Not suspended 1 = Suspended
3 Over-Current Indicator: PORT_OVER_CURRENT
0 = Power operation normal for this port 1 = Over-current condition exists for this port. Power to this port has been shut off
4 Reset: PORT_RESET
0 = Reset signalling not asserted 1 = Reset signalling asserted 5-7 Reserved. Always read as 0’s.
8 Port Power: PORT_POWER
0 = This port is powered OFF 1 = This port is powered ON
9 Low Speed Device Attached: PORT_LOW_SPEED
0 = Full Speed device attached to this port 1 = Low Speed device attached to this port 10-15 Reserved. Always read as 0’s Port Change Field, wPortChange Bit Description
0 Connect Status Change: C_PORT_CONNECTION
0 = No change has occurred on Current Connect status 1 = Current Connect Status has changed
1 Port Enable/Disable Change: C_PORT_ENABLE
0 = No change has occurred on Port Enabled/Disabled status 1 = Port Enabled/Disabled status has changed
2 Suspend Change: C_PORT_SUSPEND
0 = No change 1 = Resume complete
3 Over-Current Indicator Change: C_PORT_OVER_CURRENT
0 = No change has occurred on Over-Current indicator 1 = Over-Current indicator has changed
4 Reset Change: C_PORT_RESET
0 = No change 1 = Reset complete 5-15 Reserved. Always read as 0’s.
Set_Hub_Descriptor The AT43312 has one Hub Descriptor only and therefore does not support this request. It will respond with a STALL. Set_Hub_Feature Sets a value reported in the Hub status. The status relates to the local power and over-current. AT43312 does not support this request and will respond with a STALL. Set_Port_Feature This request changes the status of a port according to which port feature the request addressess. Not all the pos- sible port features are supported because some have no meaning. Port features supported by the Set_Port_Feature request are: PORT_ENABLE, PORT_SUSPEND, PORT_REST and PORT_POWER. A request with an unsupported feature, or if Port0 or a port higher than Port4 is addressed, will cause the hub to respond with a STALL. Port Feature Selector Table Feature Value PORT_CONNECTION 0 PORT_ENABLE 1 PORT_SUSPEND 2 PORT_OVER_CURRENT 3 PORT_RESET 4 PORT_POWER 8 PORT_LOW _SPEED 9 C_PORT_CONNECTION 16 C_PORT_ENABLE 17 C_PORT_SUSPEND 18 C_PORT_OVER_CURRENT 19 C_PORT_RESET 20
The values shown in this table are valid for TA = 0oC to 85oC, VCC5 = 4.4 to 5.25V, VCC3 = 3.0V to 3.6V, unless otherwise noted. Absolute Maximum Ratings permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this spec- ification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Voltage on any pin with Power Supply Symbol Parameter Condition Min Max Unit VCC5 5V Power Supply 4.40 5.25 V VCC3 3.3V Power Supply 3.0 3.6 V VCCA 5V Analog Power Supply 4.40 5.25 V ICC5 5V Supply Current 40 mA ICC3 3V Supply Current 20 mA ICCS Suspended Device Current 200 µA USB Signals: DPx, DMx Symbol Parameter Condition Min Max Unit ILO Hi-Z Data Line Leakage 0 V < V IN < 3.3 V -10 +10 µA VDI Differential Input Sensitivity DPx and DMx 0.2 V VCM Differential Common Mode Range 0.8 2.5 V VSE Single Ended Receiver Threshold 0.8 2.0 V VOL1 Static Output Low RL of 1.5 K Ω to 3.6 V 0.3 V VOH1 Static Output High RL of 15 K Ω to GND 2.8 3.6 V PWRx , STATx Symbol Parameter Condition Min Max Unit VOL1 Output Low Level, ST A Tx IOL = 8 mA 0.5 V VOL2 Output Low Level, PWRx IOL = 4 mA 0.5 V C out Output capacitance 1 MHz 10 pF
Note: OSC2 must not be used to drive other circuitry. Oscillator Signals: OSC1, OSC2 Symbol Parameter Condition Min Max Unit VLH OSC1 switching level 0.47 1.20 V VHL OSC1 switching level 0.67 1.44 V C X1 Input capacitance, OSC1 9 pF C X2 Output capacitance, OSC2 9 pF C 12 OSC1/2 capacitance 1 pF tsu Start-up time 6 MHz, fundamental 10 ms D L Drive level V CC5 = 5V , 6 MHz crystal, 120 Ω equiv series resistor 5 mW Comparator Signals: VREF, OVLx Symbol Parameter Condition Min Max Unit VOS Input Offset voltage -20 +20 mV A0 Open loop gain 80 dB CM IRL Input CM range low 0 V CM IRH Input CM range high V CC5 V CM RR CM rejection ratio 1 KHz 92 dB C INR Input capacitance, VREF 10 pF C INL Input capacitance, all other 6 pF
Note: 1. with external 27 Ω series resistor Dpx, Dmx Driver Characteristics, Full Speed Operation Symbol Parameter Condition Min Max Unit TR Rise time C L = 50 pF 4 20 ns TF Fall time C L = 50 pF 4 20 ns TRFM TR/TF matching 90 110 % V CRS Output signal crossover 1.3 2.0 V ZDRV Driver output resistance(1) Steady state drive 29 44 Ω Dpx, Dmx Data Source Timings, Full Speed Operation Symbol Parameter Condition Min Max Unit TDRATE Full Speed Data Rate Average Bit Rate 11.97 12.03 Mbs TFRAME Frame Interval 0.9995 1.0005 ms TDJ1 TDJ2 Source Diff Driver Jitter To N ex t Tra n s i t i o n For Paired T ransitions -3.5 -4.0 3.5 4.0 ns ns TEOPT Source EOP Width 160 175 ns TDEOP Differential to EOP T ransistion Skew -2 5 ns TJR1 TJR2 Recvr Data Jitter T olerance To N ex t Tra n s i t i o n For Paired T ransitions -18.5 18.5 ns ns T EOPR1 TEOPR2 EOP Width at Receiver Must Reject as EOP Must Receive as EOP ns ns
DPx, DMx Driver Characteristics, Low Speed Operation Symbol Parameter Condition Min Max Unit TR Rise time C L = 50 pF 75 ns TR Rise time C L = 350 pF 300 ns TF Fall time C L = 50 pF 75 ns TF Fall time C L = 350 pF 300 ns TRFM TR/TF matching 80 120 % VCRS Output signal crossover 1.3 2.0 V Dpx, Dmx Hub Timings, High Speed Operation Symbol Parameter Condition Min Max Unit THDD1 THDD2 Hub Differential Data Delay with cable without cable ns ns T HDJ1 THDJ2 Hub Diff Driver Jitter To N ex t Tra n s i t i o n For Paired T ransitions ns ns TSOP Data Bit Width Distortion after SOP -5 3 ns TEOPD Hub EOP Delay Relative to THDD 0 15 ns THESK Hub EOP Output Width Skew -15 15 ns Dpx, Dmx Hub Timings, Low Speed Operation Symbol Parameter Condition Min Max Unit T LHDD Hub Differential Data Delay 300 ns TLHDJ1 TLHDJ2 Downstr Hub Diff Driver Jitter To N ex t Tra n s i t i o n For Paired T ransitions -45 -15 ns ns T SOP Data Bit Width Distortion after SOP -60 45 ns TLEOPD Hub EOP Delay Relative to THDD 0 200 ns TLHESK Hub EOP Output Width Skew -300 300 ns
1.67(42.4) 1.64(41.7) PIN .566(14.4) .530(13.5) .090(2.29) MAX .005(.127) MIN .065(1.65) .015(.381) .022(.559) .041(1.04) .630(16.0) .590(15.0)
15 REF
.690(17.5) .610(15.5) .012(.305) .008(.203) .110(2.79) .090(2.29) .161(4.09) .125(3.18) SEATING PLANE .220(5.59) MAX 1.500(38.10) REF 32R , 32-Lead, 0.440" Wide, Plastic Gull Wing Small Outline (SOIC) Dimensions in Inches and (MIllimeters) 32P6, 32-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP) Dimensions in Inches and (Millimeters)