git://developer.intra2net.com / libftdi / blame
| Commit | Line | Data |
|---|---|---|
| 7345e955 UB |
1 | Here we try to document what we know about the EEPROM Structure. |
| 2 | ||
| 3 | Even with a 93xx66 EEPROM, at maximum 256 Bytes are used | |
| 4 | ||
| 5 | All important things happen in the first | |
| 6 | 0x14(FT232/245), 0x16(FT2232CD), 0x18(FT232/245R) or 0x1a (FT2232H/4432H) | |
| 7 | bytes | |
| 8 | ||
| 33887896 | 9 | Type | Use extra EEPROM space |
| 7345e955 UB |
10 | FT2XXB | No |
| 11 | ||
| 12 | Byte.BIT| TYPE_AM TYPE_BM TYPE_2232C TYPE_R TYPE_2232H TYPE_4232H | |
| 13 | 00.0 | 0 0 channel_a_type channel_a_type channel_a_type | |
| 14 | 00.1 | 0 0 channel_a_type channel_a_type channel_a_type | |
| 15 | 00.2 | 0 0 channel_a_type high_current channel_a_type channel_a_type | |
| 16 | 00.3 | 0 0 channel_a_driver channel_a_driver channel_a_driver channel_a_driver | |
| 17 | 00.4 | 0 0 high_current_a 0 0 0 | |
| 18 | 00.5 | 0 0 0 0 0 0 | |
| 19 | 00.6 | 0 0 0 0 0 0 | |
| 20 | 00.7 | 0 0 0 0 SUSPEND_DBUS7 0 | |
| 21 | ||
| 22 | On TYPE_R 00.3 set mean D2XX, on other devices VCP | |
| 23 | ||
| 24 | 01.0 | 0 0 channel_b_type channel_b_type channel_b_type | |
| 25 | 01.1 | 0 0 channel_b_type channel_b_type channel_b_type | |
| 26 | 01.2 | 0 0 channel_b_type 0 channel_b_type channel_b_type | |
| 27 | 01.3 | 0 0 channel_b_driver 0 channel_b_driver channel_b_driver | |
| 28 | 01.4 | 0 0 high_current_b 0 0 0 | |
| 29 | 01.5 | 0 0 0 0 0 0 | |
| 30 | 01.6 | 0 0 0 0 0 | |
| 31 | 01.7 | 0 0 0 0 0 0 | |
| 32 | ||
| 33 | Fixme: Missing 4232H validation and channel_c_driver, channel_d_driver, channel_a|b|c|d_rs484enable | |
| 34 | ||
| 33887896 TJ |
35 | 02 | Vendor ID (VID) LSB (all) |
| 36 | 03 | Vendor ID (VID) MSB (all) | |
| 37 | 04 | Product ID (PID) LSB (all) | |
| 38 | 05 | Product ID (PID) MSB (all) | |
| 39 | 06 | Device release number LSB (not tested on TYPE_4232H) | |
| 40 | 07 | Device release number MSB (not tested on TYPE_4232H) | |
| 7345e955 | 41 | | |
| 33887896 TJ |
42 | 08.4 | Battery powered |
| 43 | 08.5 | Remote wakeup | |
| 44 | 08.6 | Self powered: 1, bus powered: 0 | |
| 7345e955 UB |
45 | 08.7 | Always 1 |
| 46 | | | |
| 33887896 | 47 | 09 | Max power (mA/2) |
| 7345e955 UB |
48 | | |
| 49 | Byte.BIT| TYPE_AM TYPE_BM TYPE_2232C TYPE_R TYPE_2232H TYPE_4232H | |
| 50 | 0a.0 | 0 IsoIn | |
| 51 | 0a.1 | 0 IsoOut | |
| 52 | 0a.2 | 0 suspend_pull_down suspend_pull_down suspend_pull_down | |
| 53 | 0a.3 | 0 use_serial use_serial | |
| 33887896 TJ |
54 | 0a.4 | 0 change_usb_version change_usb_version |
| 55 | 0a.5 | 0 - reserved | |
| 56 | 0a.6 | 0 - reserved | |
| 57 | 0a.7 | 0 - reserved | |
| 58 | ||
| 7345e955 UB |
59 | | |
| 60 | 0b | TYPE_R Bitmask Invert, 0 else | |
| 61 | ||
| 62 | Byte | TYPE_AM TYPE_BM TYPE_2232C TYPE_R TYPE_2232H TYPE_4232H | |
| 33887896 TJ |
63 | 0c | 0 USB-VER-LSB USB-VER-LSB 0 ? ? |
| 64 | 0d | 0 USB-VER-MSB USB-VER-MSB 0 ? ? | |
| 65 | (On several FT2232H different values were observed -> The value is unused | |
| 66 | if change USB version is not set, so it might contain garbage) | |
| 7345e955 UB |
67 | |
| 68 | 0e | OFFSET Vendor | |
| 69 | 0f | Len VENDOR | |
| 70 | ||
| 71 | 10 | Offset Product | |
| 72 | 11 | Length Product | |
| 73 | ||
| 74 | 12 | Offset Serial | |
| 75 | 13 | Length Serial | |
| 76 | ||
| 77 | Byte.BIT| TYPE_AM TYPE_BM TYPE_2232C TYPE_R TYPE_2232H TYPE_4232H | |
| 33887896 TJ |
78 | 14.3:0 | UA UA CHIP CBUS[0] AL A |
| 79 | 14.7:0 | UA UA CHIP CBUS[1] AH B | |
| 80 | 15.3:0 | UA UA 0 CBUS[2] BL C | |
| 81 | 15.7:0 | UA UA 0 CBUS[3] BH D | |
| 82 | 16.3:0 | UA UA UA CBUS[4] 0 0 | |
| 83 | 16.7:0 | UA UA UA 0 0 0 | |
| 7345e955 UB |
84 | |
| 85 | 17 UA UA UA 0 0 0 | |
| 33887896 TJ |
86 | 18 UA UA UA VENDOR CHIP CHIP |
| 87 | 19 UA UA UA VENDOR 0 0 | |
| 7345e955 UB |
88 | |
| 89 | 1a UA(all) | |
| 90 | ||
| 91 | Mprog doesn's seem to write this: | |
| 92 | After last string | |
| 33887896 | 93 | 0x02 0x03 0x01 with PnP == 0 |