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TUSB4041IPAP 数据表(PDF) 17 Page - Texas Instruments |
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TUSB4041IPAP 数据表(HTML) 17 Page - Texas Instruments |
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17 / 48 page  17 TUSB4041I www.ti.com SLLSEK3E – JULY 2015 – REVISED SEPTEMBER 2017 Product Folder Links: TUSB4041I Submit Documentation Feedback Copyright © 2015–2017, Texas Instruments Incorporated 8.5.2 ROM Signature Register Offset = 0h Figure 3. ROM Signature Register 7 6 5 4 3 2 1 0 romSignature RW-0 Table 4. ROM Signature Register Field Descriptions Bit Field Type Reset Description 7:0 romSignature RW 0 ROM signature register The TUSB4041I device uses this register in I2C mode to validate whether the attached EEPROM has been programmed. The first byte of the EEPROM is compared to the mask 55h and if not a match, the TUSB4041I device aborts the EEPROM load and executes with the register defaults. 8.5.3 Vendor ID LSB Register Offset = 1h, reset = 51h Figure 4. Vendor ID LSB Register 7 6 5 4 3 2 1 0 vendorIdLsb[7] vendorIdLsb[6] vendorIdLsb[5] vendorIdLsb[4] vendorIdLsb[3:1] vendorIdLsb[0] R/RW-0 R/RW-1 R/RW-0 R/RW-1 R/RW-0 R/RW-1 Table 5. Vendor ID LSB Register Field Descriptions Bit Field Type Reset Description 7 vendorIdLsb[7] R/RW 0 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 overwritten to indicate a customer vendor ID. This field is R/W unless the OTP ROM VID and OTP ROM PID values are non- zero. If both values are non-zero, the value when reading this register will reflect the OTP ROM value. 6 vendorIdLsb[6] R/RW 1 5 vendorIdLsb[5] R/RW 0 4 vendorIdLsb[4] R/RW 1 3:1 vendorIdLsb[3:1] R/RW 0 0 vendorIdLsb[0] R/RW 1 8.5.4 Vendor ID MSB Register Offset = 2h, reset = 04h Figure 5. Vendor ID MSB Register 7 6 5 4 3 2 1 0 vendorIdMsb[7:3] vendorIdMsb[2] vendorIdMsb[1:0] R/RW-0 R/RW-1 R/RW-0 Table 6. Vendor ID MSB Register Field Descriptions Bit Field Type Reset Description 7:3 vendorIdMsb[7:3] R/RW 0 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. The value may be overwritten to indicate a customer vendor ID. This field is R/W unless the OTP ROM VID and OTP ROM PID values are non-zero. If both values are non-zero, the value when reading this register shall reflect the OTP ROM value. 2 vendorIdMsb[2] R/RW 1 1:0 vendorIdMsb[1:0] R/RW 0 |
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