CY7C65640 TetraHub™ High-Speed USB Hub Controller Cypress Semiconductor Corporation Document #: 38-08019 Rev. *E • 3901 North First Street • San Jose, CA 95134 • 408-943-2600 Revised June 22, 2004 CY7C65640 TABLE OF CONTENTS 1.0 TETRAHUB™ FEATURES ............................................................................................................. 5 2.0 INTRODUCTION ............................................................................................................................. 6 2.1 2.2 2.3 2.4 2.5 TetraHub Architecture ................................................................................................................6 USB Serial Interface Engine (SIE) ............................................................................................. 6 Hub Controller ............................................................................................................................ 7 Hub Repeater ............................................................................................................................. 7 Transaction Translator ............................................................................................................... 7 3.0 APPLICATIONS .............................................................................................................................. 7 4.0 FUNCTIONAL OVERVIEW ............................................................................................................. 7 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 System Initialization ................................................................................................................... 7 Enumeration ............................................................................................................................... 7 Multiple Transaction Translator Support .................................................................................... 8 Downstream Ports ..................................................................................................................... 8 Upstream Port ............................................................................................................................ 8 Power Switching ........................................................................................................................ 8 Over-current Detection ............................................................................................................... 8 Port Indicators ............................................................................................................................ 9 5.0 PIN CONFIGURATION .................................................................................................................10 6.0 PIN DESCRIPTION TABLE ..........................................................................................................11 7.0 DEFAULT DESCRIPTORS ...........................................................................................................13 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 Device Descriptor .....................................................................................................................13 Configuration Descriptor ..........................................................................................................13 Interface Descriptor ..................................................................................................................13 Endpoint Descriptor .................................................................................................................14 Interface Descriptor[3] ..............................................................................................................14 Endpoint Descriptor[3] .............................................................................................................14 Device Qualifier Descriptor ......................................................................................................14 Hub Descriptor .........................................................................................................................15 8.0 CONFIGURATION OPTIONS .......................................................................................................16 8.1 Default – 0xD0 Load ................................................................................................................16 8.2 Configured – 0xD2 Load ..........................................................................................................16 9.0 SUPPORTED USB REQUESTS ...................................................................................................18 9.1 Device Class Commands .........................................................................................................18 9.2 Hub Class Commands .............................................................................................................18 10.0 UPSTREAM USB CONNECTION ...............................................................................................21 11.0 DOWNSTREAM USB CONNECTIONS ......................................................................................21 12.0 LED CONNECTIONS ..................................................................................................................21 13.0 SAMPLE SCHEMATIC ...............................................................................................................22 14.0 ELECTRICAL CHARACTERISTICS ...........................................................................................23 14.1 Absolute Maximum Ratings ...................................................................................................23 14.2 Operating Conditions .............................................................................................................23 14.3 DC Electrical Characteristics .................................................................................................23 Document #: 38-08019 Rev. *E Page 2 of 27 CY7C65640 TABLE OF CONTENTS (continued) 14.4 AC Electrical Characteristics ..................................................................................................24 14.4.1 Serial Peripheral Interface ............................................................................................................ 24 14.4.2 Eye Diagram ................................................................................................................................24 15.0 ORDERING INFORMATION .......................................................................................................25 16.0 PACKAGE DIAGRAMS ..............................................................................................................25 16.1 Quad Flat Package No Leads (QFN) Package Design Notes ...............................................25 Document #: 38-08019 Rev. *E Page 3 of 27 CY7C65640 LIST OF FIGURES Figure 2-1. Block Diagram ..................................................................................................................... 6 Figure 5-1. 56-pin Quad Flat Pack No Leads (8 mm x 8 mm) ............................................................. 10 Figure 10-1. USB Upstream Port Connection ...................................................................................... 21 Figure 11-1. USB Downstream Port Connection ................................................................................. 21 Figure 12-1. USB Downstream Port Connection ................................................................................. 21 Figure 13-1. Sample Schematic .......................................................................................................... 22 Figure 16-1. Cross-section of the Area Underneath the QFN Package .............................................. 26 Figure 16-2a. Plot of the Solder Mask (White Area) ............................................................................ 26 Figure 16-2b. X-Ray Image of the Assembly ....................................................................................... 26 LIST OF TABLES Table 4-1. Table 4-2. Table 6-1. Table 9-1. Table 9-2. Table 9-3. Table 9-5. Table 9-4. Automatic Port State to Port Indicator Color Mapping .......................................................... 9 Port Indicator Color Definitions in Manual Mode .................................................................. 9 Pin Assignments .................................................................................................................11 Device Class Requests ......................................................................................................18 Hub Class Requests ...........................................................................................................18 Hub Class Feature Selector ...............................................................................................19 Port Indicator Selector for Feature Selector PORT_INDICATOR (0x22) ...........................20 Test Mode Selector for Feature Selector PORT_TEST (0x21) ..........................................20 Document #: 38-08019 Rev. *E Page 4 of 27 CY7C65640 1.0 • • • • • • • • • • TetraHub™ Features USB 2.0 hub Four downstream ports Multiple transaction translators – one per downstream port for maximum performance VID, PID and DID configured from external SPI EEPROM 24-MHz external crystal Small package—Quad Flat Pack, no leads (QFN) Integrated upstream pull-up resistor Integrated downstream pull-down resistors for all downstream ports Integrated upstream and downstream series termination resistors Configurable with external SPI EEPROM — Number of Active Ports — Number of Removable Ports — Maximum Power — Hub Controller Power — Power-On Timer — Overcurrent Timer — Disable Overcurrent Timer — Compound Device — Enable Full Speed Only — Disable Port Indicators — Gang Power switching — Enable Single TT Mode Only — Enable NoEOPatEOF1 Document #: 38-08019 Rev. *E Page 5 of 27 CY7C65640 2.0 Introduction Cypress’s TetraHub is a high-performance self-powered Universal Serial Bus (USB) 2.0 hub. The Tetra architecture provides four downstream USB ports, with a Transaction Translator (TT) for each port, making it the highest-performance hub possible. This single-chip device incorporates one upstream and four downstream USB transceivers, a Serial Interface Engine (SIE), USB Hub Controller and Repeater, and four TTs. It is suitable for standalone hubs, motherboard hubs, and monitor hub applications. Being a fixed-function USB device, there is no risk or added engineering effort required for firmware development. The developer does not need to write any firmware for their design. The CY4602 Tetrahub USB 2.0 4-port Hub Reference Design Kit provides all materials and documents needed to move rapidly into production. The reference design kit includes board schematics, bill of materials, Gerber files, Orcad files, key application notes, and product description. 2.1 TetraHub Architecture Figure 2-1 is a block diagram of the TetraHub Architecture. D+ D– 24 MHz Crystal High-Speed USB Control Logic Serial Interface Engine USB 2.0 PHY PLL SPI_SCK SPI_SD SPI Communication Block SPI_CS USB Upstream Port Transaction Translator (X4) Hub Repeater TT RAM Routing Logic USB Downstream Port 2 USB Downstream Port 1 USB 2.0 Port Power Control PHY D+ D– Port Status PWR#[1] OVR#[1] LED USB 2.0 Port Power Control PHY D+ D– Port Status PWR#[2] OVR#[2] LED USB Downstream Port 3 USB 2.0 Port Power Control PHY D+ D– Port Status PWR#[3] OVR#[3] LED USB Downstream Port 4 USB 2.0 Port Power Control PHY D+ D– Port Status PWR#[4] OVR#[4] LED Figure 2-1. Block Diagram 2.2 USB Serial Interface Engine (SIE) The SIE allows the CY7C65640 to communicate with the USB host through the USB repeater component of the hub. The SIE handles the following USB bus activity independently of the Hub Control Block: • Bit stuffing/unstuffing • Checksum generation/checking • ACK/NAK/STALL • TOKEN type identification • Address checking. Document #: 38-08019 Rev. *E Page 6 of 27 CY7C65640 2.3 Hub Controller The Hub Control Block does the following protocol handling at a higher level: • Coordinate enumeration by responding to SETUP packets • Fill and empty the FIFOs • Suspend/Resume coordination • Verify and select DATA toggle values • Port power control and over-current detection. The Hub Controller provides status and control and permits host access to the hub. 2.4 Hub Repeater The Hub Repeater manages the connectivity between upstream and downstream facing ports that are operating at the same speed. It supports full-/low-speed connectivity and high-speed connectivity. Per the USB 2.0 specification, the Hub Repeater provides the following functions: • Sets up and tears down connectivity on packet boundaries • Ensures orderly entry into and out of the Suspend state, including proper handling of remote wakeups. 2.5 Transaction Translator The TT basically translates data from one speed to another. A TT takes high-speed split transactions and translates them to full-/low-speed transactions when the hub is operating at high speed (the upstream port is connected to a high-speed host controller) and has full-/low-speed devices attached. The operating speed of a device attached on a downstream facing port determines whether the Routing Logic connects a port to the Transaction Translator or Hub Repeater section. If a low-/full-speed device is connected to the hub operating at high speed, the data transfer route includes the transaction translator. If a high-speed device is connected to this high-speed hub the route only includes the repeater and no transaction translator since the device and the hub are in conformation with respect to their data transfer speed. When the hub is operating at full speed (the upstream port is connected to a full-speed host controller), a high-speed peripheral will not operate at its full capability. These devices will only work at 1.1 speed. Full- and low-speed devices connected to this hub will operate at their 1.1 speed. 3.0 • • • • • • • Applications Standalone Hubs Motherboard Hubs Monitor Hub applications External Personal Storage Drives Port Replicators Portable Drive Docking Stations 4.0 Functional Overview The Cypress TetraHub USB 2.0 Hub is a high-performance, low-system-cost solution for USB. The TetraHub USB 2.0 Hub integrates 1.5k upstream pull-up resistors for full-speed operation and all downstream 15k pull-down resistors as well as series termination resistors on all upstream and downstream D+ and D– pins. This results in optimization of system costs by providing built-in support for the USB 2.0 specification. 4.1 System Initialization On power-up, the TetraHub will read an external SPI EEPROM for configuration information. At the most basic level, this EEPROM will have the Vendor ID (VID), Product ID (PID), and Device ID (DID) for the customer's application. For more specialized applications, other configuration options can be specified. See section 8.0 for more details. After reading the EEPROM, if BUSPOWER (connected to up-stream VBus) is HIGH, TetraHub will enable the pull-up resistor on the D+ to indicate that it is connected to the upstream hub, after which a USB Bus Reset is expected. During this reset, TetraHub will initiate a chirp to indicate that it is a high-speed peripheral. In a USB 2.0 system, the upstream hub will respond with a chirp sequence, and TetraHub will be in a high-speed mode, with the upstream D+ pull-up resistor turned off. In USB 1.x systems, no such chirp sequence from the upstream hub will be seen, and TetraHub will operate as a normal 1.x hub (operating at full speed). 4.2 Enumeration After a USB Bus Reset, TetraHub is in an unaddressed, unconfigured state (configuration value set to 0). During the enumeration process, the host will set the hub's address and configuration by sending a SetCongfiguration request. Changing the hub address will restore it to an unconfigured state. Document #: 38-08019 Rev. *E Page 7 of 27 CY7C65640 For high-speed multi-TT support, the host must also set the alternate interface setting to 1 (the default mode is single-TT). Once the hub is configured, the full hub functionality is available. 4.3 Multiple Transaction Translator Support After TetraHub is configured in a high-speed system, it will be in Single TT mode. The host may then set the hub into Multiple TT mode by sending a SetInterface command. In Multiple TT mode, each full-speed port is handled independently and thus has a full 12-Mbps bandwidth available. In Single TT mode, all traffic from the host destined for full- or low-speed ports will be forwarded to all of those ports. This means that the 12-Mbps bandwidth is shared by all full- and low-speed ports. 4.4 Downstream Ports TetraHub supports a maximum of four downstream ports, each of which may be marked as usable or removable in the extended configuration (0xD2 EEPROM load, see section 8.2). Downstream D+ and D– pull-down resistors are incorporated in TetraHub for each port. Prior to the hub being configured, the ports are driven SE0 (Single Ended Zero, where both D+ and D– are driven low) and are set to the unpowered state. Once the hub is configured, the ports are not driven, and the host may power the ports by sending a SetPortPower command to each port. After a port is powered, any connect or disconnect event is detected by the hub. Any change in the port state is reported by the hub back to the host through the Status Change Endpoint (endpoint 1). Upon receipt of SetPortReset command from the host, the hub will • Drive SE0 on the corresponding port • Put the port in an enabled state • Enable the green port indicator for that port (if not previously overridden by the host) • Enable babble detection once the port is enabled. Babble consists of either unterminated traffic from a downstream port (or loss of activity), or a non-idle condition on the port after EOF2. If babble is detected on an enabled port, that port will be disabled. A ClearPortEnable command from the host will also disable the specified port. Downstream ports can be individually suspended by the host with the SetPortSuspend command. If the hub is not suspended, any resume will be confined to that individual port and reflected to the host through a port change indication in the Hub Status Change Endpoint. If the hub is suspended, a resume on this port will be forwarded to the host, but other resume events will not be seen on that port. The host may resume the port by sending a ClearPortSuspend command. 4.5 Upstream Port The upstream port includes the transmitter and the receiver state machine. The Transmitter and Receiver operate in high-speed and full-speed depending on the current hub configuration. The transmitter state machine monitors the upstream facing port while the Hub Repeater has connectivity in the upstream direction. This monitoring activity prevents propagation of erroneous indications in the upstream direction. In particular, this machine prevents babble and disconnect events on the downstream facing ports of this hub from propagating and causing the hub to be disabled or disconnected by the hub to which it is attached. This allows the Hub to only disconnect the offensive port on detecting a babble from it. 4.6 Power Switching TetraHub includes interface signals for external port power switches. Both ganged and individual (per-port) configurations are supported, with individual switching being the default. Initially all ports are unpowered. After enumerating, the host may power each port by sending a SetPortPower command for that port. The power switching and over-current detection of downstream ports is managed by control pins connected to an external power switch device. PWR [n]# output pins of the CY7C65640 series are connected to the respective external power switch's port power enable signals. (Note that each port power output pin of the external power switch must be bypassed with an electrolytic or tantalum capacitor as required by the USB specification. These capacitors supply the inrush currents, which occur during downstream device hot-attach events.) 4.7 Over-current Detection Over-current detection includes timed detection of 8 ms by default. This parameter is configured from the external EEPROM in a range of 0 ms to 15 ms for both an enabled port and a disabled port individually. Detection of over-current on downstream ports is managed by control pins connected to an external power switch device. The OVR[n]# pins of the CY7C65640 series are connected to the respective external power switch's port over-current indication (output) signals. Upon detecting an over-current condition, the hub device reports the over-current condition to the host and disables the PWR# output to the external power device. Document #: 38-08019 Rev. *E Page 8 of 27 CY7C65640 4.8 Port Indicators The USB 2.0 port indicators are also supported directly by TetraHub. As per the specification, each downstream port of the hub supports an optional status indicator. The presence of indicators for downstream facing ports is specified by bit 7 of the wHubCharacteristics field of the hub class descriptor. The default TeraHub descriptor specifies that port indicators are supported (wHubCharacteristics, bit 7 is set). If port indicators are not included in the hub, this should be disabled by the EEPROM. Each port indicator is strategically located directly on the opposite edge of the port which it is associated with. The indicator provides two colors: green and amber. This is implemented as two separate LEDs, one amber and the other green. A combination of hardware and software control is used to inform the user of the current status of the port or the device attached to the port and to guide the user through problem resolution. Colors and blinking are used to provide information to the user. The significance of the color of the LED depend on the operational mode of the TetraHub. There are two modes of operation for the TetraHub port indicators: automatic and manual. On power-up the TeraHub defaults to Automatic Mode, where the color of the Port Indicator (Green, Amber, Off) indicates the functional status of the TetraHub port. In Automatic Mode, TetraHub will turn on the green LED whenever the port is enabled and the amber LED when it has had an overcurrent condition detected. The color of the port indicator is set by the port state machine. Blinking of the LEDs is not supported in Automatic Mode. Table 4-1 below identifies the mapping of color to port state in Automatic Mode. Table 4-1. Automatic Port State to Port Indicator Color Mapping Downstream Facing Hub Port State Port Switching Disconnected, Disabled, Not Configured, Resetting, Testing Powered Off Enabled, Transmit, or TransmitR Suspended, Resuming, SendEOR, Restart_E /S With Off or Amber if due to an Overcurrent Condition Off Green Off Without Off Off or Amber if due to an Overcurrent Condition Green Off In manual mode, the indicators are under the control of the host, which can turn on one of the LEDs, or leave them off. This is done by a system software USB Hub class request. Blinking of the LEDs is supported in Manual Mode. The port indicators allow the user to intervene on any error detection. For example, when babble is detected on plugging in a defective device, or on occurrence of an overcurrent condition, the port indicators corresponding to the downstream port will blink green or only light the amber LED, respectively. Table 4-2 below displays the color definition of the indicators when TetraHub is in Manual Mode. Table 4-2. Port Indicator Color Definitions in Manual Mode Color Definition Off Port State Not operational Amber Error condition Green Fully Operational Blinking Off/Green Software Attention Blinking Off/Amber Hardware Attention Blinking Green/Amber Reserved Note: Information presented in Table 4-1 and Table 4-2 is from USB 2.0 specification Tables 11-6 and 11-7, respectively. Document #: 38-08019 Rev. *E Page 9 of 27 CY7C65640 DD–[4] DD+[4] VCC SPI_SCK 50 49 48 47 46 45 44 GREEN#[4] SPI_SD 51 AMBER#[4] GND 52 VCC OVR#[4] 53 RESET PWR#[4] 54 GND OVR#[3] 55 PWR#[3] 56 VCC Pin Configuration GND 5.0 43 1 42 AMBER#[3] 41 GREEN#[3] 2 40 3 GND 4 GND 39 VCC DD–[3] 5 38 AMBER#[2] DD+[3] 6 37 GREEN#[2] VCC 7 36 AMBER#[1] GND 8 35 GREEN#[1] DD–[2] 9 34 GND DD+[2] 10 33 VCC VCC 11 32 OVR#[2] GND 12 31 PWR#[2] DD–[1] 13 30 OVR#[1] DD+[1] 14 20 21 22 23 24 25 VCC GND XIN XOUT VCC GND SPI_CS 26 27 28 GND 19 VCC 18 BUSPOWER 17 D+ 16 GND VCC 15 D– 29 PWR#[1] Figure 5-1. 56-pin Quad Flat Pack No Leads (8 mm x 8 mm) Document #: 38-08019 Rev. *E Page 10 of 27 CY7C65640 6.0 Pin Description Table Table 6-1 below displays the pin assignments for the CY7C65640. Table 6-1. Pin Assignments Pin Name Type Default Description 3 VCC Power N/A VCC. This signal provides power to the chip. 7 VCC Power N/A VCC. This signal provides power to the chip. 11 VCC Power N/A VCC. This signal provides power to the chip. 15 VCC Power N/A VCC. This signal provides power to the chip. 19 VCC Power N/A VCC. This signal provides power to the chip. 23 VCC Power N/A VCC. This signal provides power to the chip. 27 VCC Power N/A VCC. This signal provides power to the chip. 33 VCC Power N/A VCC. This signal provides power to the chip. 39 VCC Power N/A VCC. This signal provides power to the chip. 45 VCC Power N/A VCC. This signal provides power to the chip. 55 VCC Power N/A VCC. This signal provides power to the chip. 4 GND Power N/A GND. Connect to Ground with as short a path as possible. 8 GND Power N/A GND. Connect to Ground with as short a path as possible. 12 GND Power N/A GND. Connect to Ground with as short a path as possible. 16 GND Power N/A GND. Connect to Ground with as short a path as possible. 20 GND Power N/A GND. Connect to Ground with as short a path as possible. 24 GND Power N/A GND. Connect to Ground with as short a path as possible. 28 GND Power N/A GND. Connect to Ground with as short a path as possible. 34 GND Power N/A GND. Connect to Ground with as short a path as possible. 40 GND Power N/A GND. Connect to Ground with as short a path as possible. 47 GND Power N/A GND. Connect to Ground with as short a path as possible. 50 GND Power N/A GND. Connect to Ground with as short a path as possible. 56 GND Power N/A GND. Connect to Ground with as short a path as possible. 21 XIN Input N/A 24-MHz Crystal IN or External Clock Input. 22 XOUT Output N/A 24-MHz Crystal OUT. 46 RESET# Input N/A Active LOW Reset. This pin resets the entire chip. It is normally tied to VCC through a 100K resistor, and to GND through a 0.1-µF capacitor. Other than this, no other special power-up procedure is required. 26 BUSPOWER Input N/A VBUS. Connect to the VBUS pin of the upstream connector. This signal indicates to the hub that it is in a powered state, and may enable the D+ pull-up resistor to indicate a connection. (The hub will do so after the external EEPROM is read, unless it is put into a high-speed mode by the upstream hub). The hub can not be bus powered, and the VBUS signal must not be used as a power source. O O SPI Chip Select. Connect to CS pin of the EEPROM. SPI INTERFACE 25 SPI_CS 48 SPI_SCK O O SPI Clock. Connect to EEPROM SCK pin. 49 SPI_SD I/O/Z Z SPI Dataline Connect to GND with 15-KΩ resistor and to the Data I/O pins of the EEPROM. UPSTREAM PORT 17 D– I/O/Z Z Upstream D– Signal. 18 D+ I/O/Z Z Upstream D+ Signal. I/O/Z Z Downstream D– Signal. DOWNSTREAM PORT 1 13 DD–[1] Document #: 38-08019 Rev. *E Page 11 of 27 CY7C65640 Table 6-1. Pin Assignments (continued) Pin Name Type Default 14 DD+[1] I/O/Z Z Description Downstream D+ Signal. 36 AMBER#[1] O 1 LED. Driver output for Amber LED. Port Indicator Support. Active LOW. 35 GREEN#[1] O 1 LED. Driver output for Green LED. Port Indicator Support. Active LOW. 30 OVR#[1] Input 1 Overcurrent Condition Detection Input. Active LOW. 29 PWR#[1] O/Z Z Power Switch Driver Output. Active LOW. DD–[2] I/O/Z Z Downstream D– Signal. DOWNSTREAM PORT 2 9 10 DD+[2] I/O/Z Z Downstream D+ Signal. 38 AMBER#[2] O 1 LED. Driver output for Amber LED. Port Indicator Support. Active LOW. 37 GREEN#[2] O 1 LED. Driver output for Green LED. Port Indicator Support. Active LOW. 32 OVR#[2] Input 1 Overcurrent Condition Detection Input. Active LOW. 31 PWR#[2] O/Z Z Power Switch Driver Output. Active LOW. DOWNSTREAM PORT 3 5 DD–[3] I/O/Z Z Downstream D– Signal. 6 DD+[3] I/O/Z Z Downstream D+ Signal. 42 AMBER#[3] O 1 LED. Driver output for Amber LED. Port Indicator Support. Active LOW. 41 GREEN#[3] O 1 LED. Driver output for Green LED. Port Indicator Support. Active LOW. 53 OVR#[3] Input 1 Overcurrent Condition Detection Input. Active LOW. 54 PWR#[3] O/Z Z Power Switch Driver Output. Active LOW. DD–[3] I/O/Z Z Downstream D– Signal. DOWNSTREAM PORT 4 1 2 DD+[3] I/O/Z Z Downstream D+ Signal. 44 AMBER#[3] O 1 LED. Driver output for Amber LED. Port Indicator Support. Active LOW. 43 GREEN#[3] O 1 LED. Driver output for Green LED. Port Indicator Support. Active LOW. 51 OVR#[3] Input 1 Overcurrent Condition Detection Input. Active LOW. 52 PWR#[3] O/Z Z Power Switch Driver Output. Active LOW. Unused port DD+/DD– lines can be left floating. The port power, amber, and green LED pins should be left unconnected, and the overcurrent pin should be tied HIGH. The overcurrent pin is an input and it should not be left floating. Document #: 38-08019 Rev. *E Page 12 of 27 CY7C65640 7.0 Default Descriptors 7.1 Device Descriptor The standard device descriptor for TetraHub is based on the VID, PID, and DID found in the SPI EEPROM. This VID/PID/DID in the EEPROM will overwrite the default VID/PID/DID. If no EEPROM is used, the TetraHub will enumerate with the default descriptor values as shown below. Byte Full Speed High Speed 0 0x12 0x12 1 0x01 0x01 2,3 0x0200 0x0200 4 0x09 5 0x00 6 7 Field Name Description bLength 18 Bytes bDescriptorType DEVICE_DESCRIPTOR bcdUSB USB specification 2.0 0x09 bDeviceClass HUB 0x00 bDeviceSubClass None 0x00 0x02 bDeviceProtocol None 0x40 0x40 bMaxPacketSize0 64 bytes 8,9 0x04B4 0xx04B4 wIdVendor VID (overwritten by what is defined in EEPROM) 10,11 0x6560 0x6560 wIdProduct PID (overwritten by what is defined in EEPROM) 12, 13 0x0007 0x0007 wbcdDevice DID (overwritten by what is defined in EEPROM) 14 0x00 0x00 iManufacturer No manufacturer string supported 15 0x00 0x00 iProduct No product string supported 16 0x00 0x00 iSerialNumber No serial string supported 17 0x01 0x01 bNumConfigurations One configuration supported 7.2 Configuration Descriptor Byte Full Speed High Speed Field Name 0 0x09 0x09 bLength 9 Bytes 1 0x02 0x02 bDescriptorType CONFIG_DESCRIPTOR 2 0x0019 0x0029[1] 4 0x01 0x01 wTotalLength Length of all other descriptors bNumInterfaces 1 The configuration to be used 5 0x01 0x01 bConfigurationValue 6 0x00 0x00 iConfiguration 7 0xE0 0xE0 bmAttributes 8 0x32 0x32[2] bMaxPower 7.3 Description Interface Descriptor Byte Full Speed High Speed Field Name Description 0 0x09 0x09 bLength 9 Bytes 1 0x04 0x04 bDescriptorType INTERFACE_DESCRIPTOR 2 0x00 0x00 bInterfaceNumber 3 0x00 0x00 bAlternateSetting 4 0x01 0x01 bNumEndpoints 5 0x09 0x09 bInterfaceClass 6 0x00 0x00 bInterfaceSubClass 7 0x00 0x01 bInterfaceProtocol 8 0x00 0x00 iInterface Notes: 1. This value is reported as 0x19 if the hub is configured in Single-TT mode. 2. This value is configured through the External EEPROM. Document #: 38-08019 Rev. *E Page 13 of 27 CY7C65640 7.4 Endpoint Descriptor Byte Full Speed High Speed 0 0x07 0x07 Field Name bLength Description 7 Bytes 1 0x05 0x05 bDescriptorType ENDPOINT_DESCRIPTOR 2 0x81 0x81 bEndpointAddress IN Endpoint #1 3 0x03 0x03 4,5 0x0001 0x0001 6 0xFF 0x0C bmAttributes Interrupt wMaxPacketSize Maximum Packet Size bInterval Polling Rate Interface Descriptor[3] 7.5 I Byte Full Speed High Speed 0 N/A 0x09 bLength Field Name 9 Bytes Description 1 N/A 0x04 bDescriptorType INTERFACE_DESCRIPTOR 2 N/A 0x00 bInterfaceNumber Interface Descriptor Index 3 N/A 0x01 bAlternateSetting Alternate Setting for the Interface 4 N/A 0x01 bNumEndpoints Number of Endpoints Defined 5 N/A 0x09 bInterfaceClass Interface Class 6 N/A 0x00 bInterfaceSubClass Interface Sub-Class 7 N/A 0x02 bInterfaceProtocol Interface Protocol 8 N/A 0x00 bInterface Interface String Index Endpoint Descriptor[3] 7.6 Byte Full Speed High Speed 0 N/A 0x07 bLength Field Name 7 Bytes Description 1 N/A 0x05 bDescriptorType ENDPOINT_DESCRIPTOR 2 N/A 0x81 bEndpointAddress IN Endpoint #1 bmAttributes Interrupt wMaxPacketSize Maximum Packet Size bInterval Polling Rate 3 N/A 0x03 4,5 N/A 0x0001 6 N/A 0x0C 7.7 Device Qualifier Descriptor Byte Full Speed High Speed 0 0x0A 0x0A bLength Field Name 10 Bytes bDescriptorType DEVICE_QUALIFIER 1 0x06 0x06 2,3 0x0200 0x0200 4 0x09 0x09 bDeviceClass 5 0x00 0x00 bDeviceSubClass 6 0x02 0x00 bDeviceProtocol 7 0x40 0x40 bMaxPacketSize0 8 0x01 0x01 bNumConfigurations 9 0x00 0x00 bReserved Description bcdUSB Note: 3. If TetraHub is configured for single-TT only (from the external EEPROM), this descriptor is not present. Document #: 38-08019 Rev. *E Page 14 of 27 CY7C65640 7.8 Hub Descriptor Byte All Speeds 0 0x09 bLength 9 Bytes 1 0x29 bDescriptorType HUB Descriptor 2 0x04[4] bNbrPorts Number of ports supported wHubCharacteristics b1, b0: Logical Power Switching Mode 00: Ganged power switching (all ports’ power at once) 01: Individual port power switching (Default in TetraHub) 3,4 0x0089 [4] Field Name Description b2: Identifies a Compound Device, 0: Hub is not part of a compound device (Default in TetraHub), 1: Hub is part of a compound device. b4, b3: Over-current Protection Mode 00: Global Overcurrent Protection. The hub reports overcurrent as a summation of all ports current draw, without a breakdown of individual port overcurrent status. 01: Individual Port Overcurrent Protection. The hub reports overcurrent on a per-port basis. Each port has an over-current status (Default in TetraHub). 1X: No Overcurrent Protection. This option is allowed only for bus-powered hubs that do not implement overcurrent protection. b6, b5: TT Think Time 00: TT requires at most 8 FS bit times of inter transaction gap on a full-/low-speed downstream bus (Default in TetraHub). 01: TT requires at most 16 FS bit times. 10: TT requires at most 24 FS bit times. 11: TT requires at most 32 FS bit times. b7: Port Indicators Supported, 0: Port Indicators are not supported on its downstream facing ports and the PORT_INDICATOR request has no effect. 1: Port Indicators are supported on its downstream facing ports and the PORT_INDICATOR request controls the indicators. See Section 4 and 9 (Default in TetraHub). b15, ..b8: Reserved 5 0x32[4] bPwrOn2PwrGood Time from when the port is powered to when the power is good on that port 6 0x64 [4] bHubContrCurrent Maximum current requirement for the Hub Controller 7 0x00[4] bDeviceRemovable Indicates if the port has a removable device attached 8 [4] bPortPwrCtrlMask Required for compatibility with software written for 1.0 compliant devices 0xFF Note: 4. This value is configured through the External EEPROM. Document #: 38-08019 Rev. *E Page 15 of 27 CY7C65640 8.0 Configuration Options Systems using TetraHub must have an external EEPROM in order for the device to have a unique VID, PID, and DID. The TetraHub can talk to SPI EEPROM that are double byte addressable only. TetraHub uses the command format from the '040 parts. The TetraHub cannot talk to ‘080 EEPROM parts, as the read command format used for talking to ‘080 is not the same as ‘040. The '010s and '020s uses the same command format as used to interface with the ‘040 and hence these can also be used to interface with the TetraHub. 8.1 Default – 0xD0 Load When used in default mode, only a unique VID, PID, and DID must be present in the external SPI EEPROM. The contents of the EEPROM must contain this information in the following format: Byte 8.2 Value 0 0xD0 1 VID (LSB) 2 VID (MSB) 3 PID (LSB) 4 PID (MSB) 5 DID (LSB) 6 DID (MSB) Configured – 0xD2 Load Byte Value (MSB->LSB) 0 0xD2 1 VID (LSB) 2 VID (MSB) 3 PID (LSB) 4 PID (MSB) 5 DID (LSB) 6 DID (MSB) 7 EnableOverCurrentTimer[3:0], DisableOvercurrentTimer[3:0] 8 ActivePorts[3:0], RemovablePorts[3:0] 9 MaxPower 10 HubControllerPower 11 PowerOnTimer 12 IllegalHubDescriptor, CompoundDevice, FullspeedOnly, NoPortIndicators, Reserved, GangPowered, SingleTTOnly, NoEOPatEOF1 Byte 0: 0xD2 Needs to be programmed with 0xD2 Byte 1: VID (LSB) Least Significant Byte of Vendor ID Byte 2: VID (MSB) Most Significant Byte of Vendor ID Byte 3: PID (LSB) Least Significant Byte of Product ID Byte 4: PID (MSB)] Most Significant Byte of Product ID Document #: 38-08019 Rev. *E Page 16 of 27 CY7C65640 Byte 5: DID (LSB) Least Significant Byte of Device ID Byte 6: DID (MSB)] Most Significant Byte of Device ID Byte 7: EnableOvercurrentTimer[3:0], DisabledOvercurrentTimer[3:0] Count time in ms for filtering overcurrent detection. Bits 7–4 are for an enabled port, and bits 3–0 are for a disabled port. Both range from 0 ms to 15 ms. See section 4.8. Default: 8 ms = 0x88. Byte 8: ActivePorts[3:0], RemovablePorts[3:0] Bits 7–4 are the ActivePorts[3:0] bits that indicates if the corresponding port is usable. For example, a two-port hub that uses ports 1 and 4 would set this field to 0x09. The total number of ports reported in the Hub Descriptor: bNbrPorts field is calculated from this. Bits 3–0 are the RemovablePorts[3:0] bits that indicates whether the corresponding port is removable (set to HIGH). This bit’s values are recorded appropriately in the HubDescriptor:DeviceRemovable field. Default: 0xFF. Byte 9: MaximumPower This value is reported in the ConfigurationDescriptor:bMaxPower field and is the current in 2-mA intervals that is required from the upstream hub. Default: 0x32 = 100 mA Byte 10: HubControllerPower This value is reported in the HubDescriptor:bHubContrCurrent field and is the current in milliamperes required by the hub controller. Default: 0x64 = 100 mA. Byte 11: PowerOnTimer This value is reported in the HubDescriptor:bPwrOn2PwrGood field and is the time in 2-ms intervals from the SetPortPower command until the power on the corresponding downstream port is good. Default: 0x32 = 100 ms. Byte 12: IllegalHubDescriptor, Unused, FullspeedOnly, NoPortIndicators, Reserved, GangPowered, SingleTTOnly, NoEOPatEOF1 Bit 7: IllegalHubDescriptor: For GetHubDescriptor request, some USB hosts use a DescriptorTypeof 0x00 instead of HUB_DESCRIPTOR, 0x29. According to the USB 2.0 standard, a hub must treat this as a Request Error, and STALL the transaction accordingly (USB 2.0, 11.24.2.5). For systems that do not accept this, the IllegalHubDescriptor configuration bit may be set to allow TetraHub to accept a DescriptorType of 0x00 for this command. Default is 0, recommended setting is 1. Bit 6: Unused: This bit is an unused, don’t care bit and can be set to anything. Bit 5: Fullspeed: Only configures the hub to be a full-speed only device. Default set to 0. Bit 4: NoPortIndicators: Turns off the port indicators and does not report them as present in the HubDescriptor, wHubCharacteristics b7 field. Default set to 0. Bit 3: Reserved: This bit is reserved and should not be set to 1. Must be set to 0. Bit 2: GangPowered: Indicates whether the port power switching is ganged (set to 1) or per-port (set to 0). This is reported in the HubDescriptor, wHubCharacteristics field, b4, b3, b1, and b0. Default set to 0. Bit 1: SingleTTOnly: Indicates that the hub should only support single Transaction Translator mode. This changes various descriptor values. Default set to 0. Bit 0: NoEOPatEOF1 turns off the EOP generation at EOF1 in full-speed mode. Note that several USB 1.1 hosts can not handle EOPatEOF1 properly. Cypress recommends that this option be turned off for general-purpose hubs. Default is 0, recommended setting is 1. Document #: 38-08019 Rev. *E Page 17 of 27 CY7C65640 9.0 Supported USB Requests 9.1 Device Class Commands Table 9-1. Device Class Requests Request bmRequestType bRequest wValue wIndex wLength Data GetDeviceStatus 10000000B 0x00 0x0000 0x0000 0x0002 2 Byte Device Status GetInterfaceStatus 10000001B 0x00 0x0000 0x0000 0x0002 2 Byte Endpoint Status GetEndpointStatus 10000010B 0x00 0x0000 0x0000 0x0002 2 Byte Endpoint Status GetDeviceDescriptor 10000000B 0x06 0x0001 Zero or Language ID Descriptor Descriptor Length GetConfigDescriptor 10000000B 0x06 0x0002 Zero or Language ID Descriptor Descriptor Length GetDeviceQualifierDescriptor 10000000B 0x06 0x0006 Zero or Language ID Descriptor Descriptor Length GetOtherSpeedConfigurationDescriptor 10000000B 0x06 0x0007 Zero or Language ID Descriptor Descriptor Length GetConfiguration[5] 10000000B 0x08 0x0000 0x0000 0x0001 Configuration value SetCongfiguration[5] 00000000B 0x09 Configuration Value 0x0000 0x0000 None GetInterface 10000001B 0xA 0x0000 0x0000 0x0001 Interface Number SetInterface 00000001B 0x0B Alternate Setting Interface Number 0x0000 None SetAddress 00000000B 0x05 Device Address 0x0000 0x0000 None SetDeviceRemoteWakeup 00000000B 0x03 0x01 0x0000 0x0000 None SetDeviceTest_J 00000000B 0x03 0x02 0x0100 0x0000 None SetDeviceTest_K 00000000B 0x03 0x02 0x0200 0x0000 None SetDeviceTest_SE0_NAK 00000000B 0x03 0x02 0x0300 0x0000 None SetDeviceTest_Packet 00000000B 0x03 0x02 0x0400 0x0000 None SetEndpointHalt 00000000B 0x03 0x00 0x0000 0x0000 None ClearDeviceRemoteWakeup 00000000B 0x01 0x01 0x0000 0x0000 None ClearEndpointHalt 00000000B 0x01 0x00 0x0000 0x0000 None 9.2 Hub Class Commands Table 9-2. Hub Class Requests Request bmRequestType bRequest wValue wIndex wLength Data GetHubStatus 10100000B 0x00 0x0000 0x0000 0x0004 Hub Status (See Table 11-19 of Spec) Change Status (See table 11-20 of Spec) GetPortStatus 10100011B 0x00 0x0000 Byte 0: 0x00 0x0004 Byte 1: Port Port Status (See Table 11-21 of Spec) Change Status (See table 11-20 of Spec) ClearHubFeature 00100000B 0x01 Feature Selectors[6] 0 or 1 0x0000 0x0000 None ClearPortFeature 00100011B 0x01 Feature Selectors[6] Byte 0: 0x00 0x0000 1, 2, 8, 16, 17, 18, 19, Byte 1: Port or 20 None Notes: 5. Only one configuration is supported in TetraHub. 6. Feature selector values for different feature is presented in Table 9-3. Document #: 38-08019 Rev. *E Page 18 of 27 CY7C65640 Table 9-2. Hub Class Requests (continued) Request bmRequestType bRequest wValue wIndex wLength Data ClearPortFeature 00100011B 0x01 0x0000 Byte 0: Feature Selectors[7] Selectors[6] 22 (PORT_INDICATOR) 0, 1, 2, or 3 Byte 1: Port None SetHubFeature 00100000B 0x03 Feature Selector[6] 0x0000 0x0000 TetraHub STALLs this request SetPortFeature 00100011B 0x03 Feature Selectors[6] 2, 4 or 8 Port 0x0000 None SetPortFeature 00100011B 0x03 Feature Selector[6] 21 (PORT_TEST) 0x0000 Byte 0: Selectors[8] 1,2, 3, 4 or 5 Byte 1: Port None SetPortFeature 00100011B 0x03 Feature 0x0000 Byte 0: Selector[6] 22 Selectors[7] (PORT_INDICATOR) 0, 1, 2, or 3 Byte 1: Port None GetHubDescriptor 10100000B 0x06 Descriptor Type and Descriptor Index ClearTTBuffer 00100011B 0x08 Dev_Addr, EP_Num TT_Port 0x0000 None ResetTT 00100000B 0x09 0x0000 Byte 0: 0x00 0x0000 Byte 1: Port None GetTTState 10100011B 0X0A TT_Flags Byte 0: 0x00 TT State Byte 1: Port Length TT State StopTT 00100011B 0x0B 0x0000 Byte 0: 0x00 0x0000 Byte 1: Port None Hub Descriptor Length Table 9-3. Hub Class Feature Selector Recipient Value C_HUB_LOCAL_POWER Feature Selector Hub 0 C_HUB_OVER_CURRENT Hub 1 PORT_CONNECTION Port 0 PORT_ENABLE Port 1 PORT_SUSPEND Port 2 PORT_RESET Port 4 PORT_POWER Port 8 PORT_LOW_SPEED Port 9 C_PORT_CONNECTION Port 16 C_PORT_ENABLE Port 17 C_PORT_SUSPEND Port 18 C_PORT_OVER_CURRENT Port 19 C_PORT_RESET Port 20 PORT_TEST Port 21 PORT_INDICATOR Port 22 Notes: 7. Selector values for different feature is presented in Table 9-5. 8. Selector values for different feature is presented in Table 9-4. Document #: 38-08019 Rev. *E Page 19 of 27 CY7C65640 Table 9-4. Test Mode Selector for Feature Selector PORT_TEST (0x21) PORT_TEST Mode Description Selector Value Test_J 1 Test_K 2 Test_SE0_NAK 3 Test_Packet 4 Test_Force_Enable 5 Table 9-5. Port Indicator Selector for Feature Selector PORT_INDICATOR (0x22) Port Indicator Color Selector Value Port Indicator Mode Color Set Automatically as shown in Table 4-1 0 Automatic Mode Amber 1 Manual Mode Green 2 Manual Mode Off 3 Manual Mode Document #: 38-08019 Rev. *E Page 20 of 27 CY7C65640 10.0 Upstream USB Connection The following is a schematic of the USB upstream connector. BUSPOWER VCC D– D– D+ D+ 2.2 µF 10V 100 kΩ GND SHELL 4.7 nF 250V 1 MΩ Figure 10-1. USB Upstream Port Connection 11.0 Downstream USB Connections The following is a schematic of the USB downstream connector. PWRx 150 µF 10V VCC 0.01 µF DD–[X] DD+[X] D– D+ GND SHELL Figure 11-1. USB Downstream Port Connection 12.0 LED Connections The following is a schematic of the LED circuitry. 3.3V GREEN#[x] AMBER#[x] 680Ω 680Ω Figure 12-1. USB Downstream Port Connection Document #: 38-08019 Rev. *E Page 21 of 27 CY7C65640 13.0 Sample Schematic 5V VCC D– D+ BUSPOWER D– D+ PWR1 PWR1 2.2 µF 10V OVR1 PWR4 Power PWR2 Management OVR2 PWR3 100 kΩ GND OVR3 PWR4 OVR4 SHELL 4.7 nF 250V PWR3 150 µF 10V DD–[1] DD+[1] 0.01 µF VCC D– D+ GND SHELL PWR2 PWR1 3.3V GREEN#[1] 680Ω 1 MΩ AMBER#[1] 680Ω SPI_SD SPI_SCK SPI EEPROM PWR2 SPI_SD 150 µF 10V SPI_CS DD–[2] DD+[2] 0.01 µF VCC D– D+ GND SHELL 24 MHz 3.3V 3V GREEN#[2] 27 pF 2 7pF 680Ω XOUT XIN VCC1 VCC2 VCC3 VCC4 VCC5 VCC6 VCC7 VCC8 VCC9 VCC10 VCC11 AMBER#[2] 680Ω BUSPOWER BUSPOWER PWR3 GREEN[1] GREEN[1] AMBER[1] AMBER[1] 3.3V DD-[3] DD+[3] 0.01 µF GREEN[2] GREEN[2] AMBER[2] AMBER[2] 100K D– DD+ D+ CY7C65640-QFN GREEN[4] GREEN[4] AMBER[4] AMBER[4] PWR1 OVR1 PWR2 OVR2 PWR3 OVR3 PWR4 OVR4 SPI_CS DD–[1] DD-[1] DD+[1] DD+[1] DD–[2] DD-[2] DD+[2] DD+[2] DD–[3] DD-[3] DD+[3] DD+[3] DD–[4] DD-[4] PWR1 OVR1 PWR2 OVR2 PWR3 OVR3 PWR4 OVR4 SPI_CS VCC D– D+ GND SHELL GREEN[3] GREEN[3] AMBER[3] AMBER[3] RESET 0.1µF 150 µF 10V 3.3 V GREEN#[3] AMBER#[3] 680Ω 680Ω PWR4 150 µF 10V DD-[4] DD+[4] 0.01 µF VCC D– D+ GND SHELL SPI_SCK SPI_SCK DD+[4] DD+[4] 3.3 V GND1 GND2 GND3 GND4 GND5 GND6 GND7 GND8 GND9 GND10 GND11 GND12 SPI_SD SPI_SD GREEN#[4] AMBER#[4] 680Ω 680Ω Figure 13-1. Sample Schematic Document #: 38-08019 Rev. *E Page 22 of 27 CY7C65640 14.0 Electrical Characteristics 14.1 Absolute Maximum Ratings Storage Temperature ........................................................................................................................................ –65°C to +150 °C Ambient Temperature with Power Applied ................................................................................................................ 0°C to +70°C Supply Voltage to Ground Potential ...................................................................................................................... –0.5V to +4.0V DC Voltage Applied to Outputs in High Z State.............................................................................................. –0.5V to VCC + 0.5V Power Dissipation (4 HS ports).............................................................................................................................................. 1.6W Static Discharge Voltage ...................................................................................................................................................> 2000V Max. Output Sink Current per I/O ........................................................................................................................................ 10 mA 14.2 Operating Conditions TA (Ambient Temperature Under Bias) ..................................................................................................................... 0°C to +70°C Supply Voltage ................................................................................................................................................... +3.15V to +3.45V Ground Voltage .......................................................................................................................................................................... 0V FOSC (Oscillator or Crystal Frequency) ................................................. 24 MHz ± 0.05%, parallel resonant, fundamental mode 14.3 DC Electrical Characteristics Parameter Description Conditions VCC Supply Voltage VIH Input High Voltage VIL Input Low Voltage Il Input Leakage Current 0 < VIN < VCC VOH Output Voltage High IOUT = 4 mA VOL Output Low Voltage IOUT = –4 mA IOH Output Current High IOL CIN ISUSP Suspend Current ICC Supply Current Min. Typ. Max. Unit 3.15 3.3 3.45 V 2 5.25 V –0.5 0.8 V ±10 µA 2.4 V 0.4 V 4 mA Output Current Low 4 mA Input Pin Capacitance 10 pF 4 Active ports 2 Active Ports No Active Ports µA 100 Full-speed Host, Full-speed Devices 255 mA High-speed Host, High-speed Devices 460 mA High-speed Host, Full-speed Devices 395 mA Full-speed Host, Full-speed Devices 255 mA High-speed Host, High-speed Devices 415 mA High-speed Host, Full-speed Devices 380 mA Full-speed Host 255 mA High-speed Host 370 mA USB Transceiver ZHSDRV Driver Output Resistance Ii Input Leakage Current IOZ Three-state Output OFF-State Current VHSRS High-speed Receiver Sensitivity Level Trfi Full-speed Frame Jitter Document #: 38-08019 Rev. *E 41 45 ±0.1 49 Ω ±5 µA ±10 µA 210 mV 133 ns Page 23 of 27 CY7C65640 14.4 AC Electrical Characteristics Both the upstream USB transceiver and all four downstream transceivers have passed the USB-IF USB 2.0 Electrical Certification Testing. 14.4.1 Serial Peripheral Interface Parameter 14.4.2 Description Conditions Min. Typ. Max. Unit Clock Rise/Fall Time 500 ns Clock Frequency 250 kHz Data Set-up Time 50 ns Hold Time 100 ns Eye Diagram Document #: 38-08019 Rev. *E Page 24 of 27 CY7C65640 15.0 Ordering Information Ordering Code Package Type CY7C65640-LFC 56-pin QFN CY7C65640-LFXC 56-pin QFN Lead Free Package CY4602 TetraHub USB 2.0 4 port Hub Reference Design Kit 16.0 Package Diagrams The TetraHub is available in a space-saving 56-pin QFN (8 X 8 mm) 56-Lead QFN 8 x 8 MM LF56A TOP VIEW BOTTOM VIEW SIDE VIEW 0.08[0.003] C 1.00[0.039] MAX. 7.90[0.311] 8.10[0.319] A 0.05[0.002] MAX. 0.80[0.031] MAX. 7.70[0.303] 7.80[0.307] 0.18[0.007] 0.28[0.011] 0.20[0.008] REF. 0.80[0.031] DIA. PIN1 ID 0.20[0.008] R. N N 1 1 2 2 0.45[0.018] 6.45[0.254] 6.55[0.258] 7.90[0.311] 8.10[0.319] 7.70[0.303] 7.80[0.307] E-PAD (PAD SIZE VARY BY DEVICE TYPE) 0.30[0.012] 0.50[0.020] 0°-12° 0.50[0.020] C SEATING PLANE 0.24[0.009] 0.60[0.024] (4X) 6.45[0.254] 6.55[0.258] 51-85144-*D Dimensions are in milimeters MIN MAX Note: The bottom metal pad size varies by product due to die size variable. If metal pad design or dimension are critical with your board designs, please contact Cypress Sales office to get the specific outline option. 16.1 Quad Flat Package No Leads (QFN) Package Design Notes The QFN (Quad Flatpack No Leads), being a lead free package, the electrical contact of the part to the Printed Circuit Board (PCB) is made by soldering the lands on the bottom surface of the package to the PCB. Hence special attention is required to the heat transfer area below the package to provide a good thermal bond to the circuit board. A Copper (Cu) fill should be designed into the PCB as a thermal pad under the package. Heat is transferred from the TeraHub through the device’s metal paddle on the bottom side of the package. Heat from here is conducted to the PCB at the thermal pad. It is then conducted from the thermal pad to the PCB inner ground plane by a 5 x 5 array of Via. A Via is a plated through-hole in the PCB with a finished diameter of 13 mil. The QFN’s metal die paddle must be soldered to the PCB’s thermal pad. Solder mask is placed on the board top side over each Via to resist solder flow into the Via. The mask on the top side also minimizes outgassing during the solder reflow process. Please follow the layout guidelines provided in the PCB layout files accompanied with the CY4602 TetraHub Reference Design Kit. The information in this section was derived from the original application note by the package vendor. For further information on this package design please refer to the application note “Surface Mount Assembly of AMKOR’s MicroLeadFrame (MLF) Technology”. This application note can be downloaded from AMKOR’s website from the following URL http://www.amkor.com/products/notes_papers/MLF_AppNote_0301.pdf. This application note provides detailed information on board mounting guidelines, soldering flow, rework process, etc. Document #: 38-08019 Rev. *E Page 25 of 27 CY7C65640 Figure 16-1 below displays a cross-sectional area underneath the package. The cross section is of only one via. The solder Paste template needs to be designed to allow at least 50% solder coverage. The thickness of the solder paste template should be 5mil. It is recommended that “No Clean”, type 3 solder paste is used for mounting the part. Nitrogen purge is recommended during reflow. 0.017” dia Solder Mask Cu Fill Cu Fill PCB Material Via hole for thermally connecting the QFN to the circuit board ground plane. 0.013” dia PCB Material This figure only shows the top three layers of the circuit board: Top Solder, PCB Dielectric, and the Ground Plane. Figure 16-1. Cross-section of the Area Underneath the QFN Package Figure 16-2a is a plot of the solder mask pattern and Figure 16-2b displays an X-Ray image of the assembly (darker areas indicate solder). Figure 16-2a. Plot of the Solder Mask (White Area) Figure 16-2b. X-Ray Image of the Assembly TetraHub is a trademark of Cypress Semiconductor Corporation. All product and company names mentioned in this document may be the trademarks of their respective holders. Document #: 38-08019 Rev. *E Page 26 of 27 © Cypress Semiconductor Corporation, 2004. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges. CY7C65640 Document History Page Document Title: CY7C65640 TetraHub™ High-Speed USB Hub Controller Document Number: 38-08019 REV. ECN NO. Issue Date Orig. of Change Description of Change ** 113506 04/25/02 BHA New Data Sheet (preliminary) *A 116812 08/15/02 MON Supply voltage range changed from 3.3V–3.6V to 3.15V–3.45 Added EPROM types that can be used with HX2 (p. 14) Added description of bit 7 of Byte 12 (Illegal Hub Descriptor) D2 Load (p. 15) Added high speed sensitivity level of receiver (p. 20) Added QFN package design notes (section 16.1) *B 118518 10/31/02 MON Fixed the Spec field in the Default Device Descriptor section 7.1 Fixed Interface Protocol field of the interface descriptor, section 7.3 Fixed Device Protocol field of the interface descriptor, section 7.7 Modified table 9-2, section 9.2 Added table 9-4, 9-5, section 9.2 Added table 4-1, 4-2, section 4.8 Added information on bits in wHubCharacterestics, section 7.8 Modified figure 16-1 in QFN package design notes, section 16.1 Included the eye diagram, section 14.4.2 Preliminary to Final *C 121793 12/09/02 MON Fixed the SPI clock Frequency to 250 KHz, section 14.4.1 Added information on the configuration of unused port pins, section 6.0 Added statement that no special power-up procedure is required, section 6.0 *D 125275 04/02/03 MON Changed the name of Bit 3 of Byte 12 of EEPROM for a 0xD2 load (section 8.2) from BusPowered to Reserved. Removed all indication to the misconception that the hub can support bus power. Added information as to which nibble of byte 8 in the EEPROM defines the active ports and which nibble defines the removable ports, section 8.2. Added further information on the BUSPOWER pin (pin 26) functionality in section 6.0. *E 234272 see ECN MON Added part number for the lead free package (CY7C65640-LFXC), section 15.0 Changed the name of Bit 6 of Byte 12 of EEPROM for a 0xD2 load from CompoundDevice to Unused, section 8.2. Document #: 38-08019 Rev. *E Page 27 of 27