FreeCalypso > hg > fc-usbser-tools
comparison doc/FTDI-EEPROM-format @ 70:09da7db45dce
doc/FTDI-EEPROM-format: document FT232R specifics
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sun, 24 Sep 2023 21:31:37 +0000 |
| parents | 065f68a94b6b |
| children | 0b37be8b23ca |
comparison
equal
deleted
inserted
replaced
| 69:065f68a94b6b | 70:09da7db45dce |
|---|---|
| 248 | 248 |
| 249 * Word 12 on FT2232H is same as word 10 on FT2232C/D: EEPROM type code, even | 249 * Word 12 on FT2232H is same as word 10 on FT2232C/D: EEPROM type code, even |
| 250 though it still isn't clear what the chip does with it, if anything. | 250 though it still isn't clear what the chip does with it, if anything. |
| 251 | 251 |
| 252 * The strings area of the EEPROM begins with word 13 or byte offset 0x1A. | 252 * The strings area of the EEPROM begins with word 13 or byte offset 0x1A. |
| 253 | |
| 254 FT232R specifics | |
| 255 ================ | |
| 256 | |
| 257 Words 0 through 9 (bytes up to 0x13) are as explained above. The following | |
| 258 words 10 and 11 are specific to FT232R - they encode configured functions for | |
| 259 CBUSx pins as follows: | |
| 260 | |
| 261 word 10 bits 3:0 CBUS0 config | |
| 262 word 10 bits 7:4 CBUS1 config | |
| 263 word 10 bits 11:8 CBUS2 config | |
| 264 word 10 bits 15:12 CBUS3 config | |
| 265 word 11 bits 3:0 CBUS4 config | |
| 266 word 11 bits 15:4 reserved | |
| 267 | |
| 268 Please refer to libftdi source for the codes that go into individual 4-bit | |
| 269 fields for each CBUSx. | |
| 270 | |
| 271 The strings area of the EEPROM begins with word 12 or byte offset 0x18. |