User manual TEXAS INSTRUMENTS TUSB8040 DATA MANUAL 09-2010

[. . . ] TUSB8040 USB 3. 0 Four Port Hub Data Manual PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Literature Number: SLLSE42 September 2010 TUSB8040 SLLSE42 ­ SEPTEMBER 2010 www. ti. com Contents 1 2 3 4 5 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1. 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] In I2C mode, the TUSB8040 reads the contents of the EEPROM at bus address 1010000b using 7-bit addressing starting at address 0. If the value of the EEPROM contents at byte 00h equals 55h, the TUSB8040 loads the configuration registers according to the EEPROM map. If the first byte is not 55h, the TUSB8040 exits the I2C mode and continues execution with the default values in the configuration registers. The hub will not connect on the upstream port until the configuration is completed. Note, the bytes located below offset 9h are optional. The requirement for data in those addresses is dependent on the options configured in the Device Configuration and Phy Custom Configuration registers. For details on I2C operation refer to the UM10204 I2C-bus Specification and User Manual. 3. 2 SMBus Slave Operation When the SMBus interface mode is enabled, the TUSB8040 supports read block and write block protocols as a slave-only SMBus device with a slave address of 1000 11xy, where · x is the state of FULLPWRMGMTz_SMBA1 at reset, and · y indicates read (logic 1) or write (logic 0) access. If the TUSB8040 is addressed by a host using an unsupported protocol it does not respond. The TUSB8040 waits indefinitely for configuration by the SMBus host and does not connect on the upstream port until the SMBus host indicates configuration is complete by clearing the CFG_ACTIVE bit. For details on SMBus requirements refer to the System Management Bus Specification. Copyright © 2010, Texas Instruments Incorporated FUNCTIONAL DESCRIPTION Submit Documentation Feedback Product Folder Link(s): TUSB8040 13 TUSB8040 SLLSE42 ­ SEPTEMBER 2010 www. ti. com 3. 3 Configuration Registers The internal configuration registers are accessed on byte boundaries. The configuration register values are loaded with defaults but can be over-written when the TUSB8040 is in I2C or SMBus mode. 3. 3. 1 ROM Signature Register Table 3-2. RESET STATE 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 Table 3-3. Bit Descriptions ­ ROM Signature Register BIT 7:0 FIELD NAME romSignature ACCESS RW DESCRIPTION ROM Signature Register. This register is used by the TUSB8040 in I2C mode to validate the attached EEPROM has been programmed. The first byte of the EEPROM is compared to the mask 55h and if not a match, the TUSB8040 aborts the EEPROM load and executes with the register defaults. 3. 3. 2 Vendor ID LSB Register Table 3-4. RESET STATE 7 0 6 1 5 0 4 1 3 0 2 0 1 0 0 1 Table 3-5. Bit Descriptions ­ Vendor ID LSB Register BIT 7:0 FIELD NAME vendorIdLsb ACCESS RW DESCRIPTION Vendor ID LSB. Least significant byte of the unique vendor ID assigned by the USB-IF; the default value of this register is 51h representing the LSB of the TI Vendor ID 0451h. The value may be over-written to indicate a customer Vendor ID. 3. 3. 3 Vendor ID MSB Register Table 3-6. RESET STATE 7 0 6 0 5 0 4 0 3 0 2 1 1 0 0 0 Table 3-7. Bit Descriptions ­ Vendor ID MSB Register BIT 7:0 FIELD NAME vendorIdMsb ACCESS RW DESCRIPTION Vendor ID MSB. Most significant byte of the unique vendor ID assigned by the USB-IF; the default value of this register is 04h representing the MSB of the TI Vendor ID 0451h. [. . . ] All products are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. [. . . ]