63.10.71 TWI Alternative Command Register
| Name: | FLEX_TWI_ACR |
| Offset: | 0x640 |
| Reset: | 0x00000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| NPEC | NDIR | ||||||||
| Access | R/W | R/W | |||||||
| Reset | 0 | 0 |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| NDATAL[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| PEC | DIR | ||||||||
| Access | R/W | R/W | |||||||
| Reset | 0 | 0 |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| DATAL[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Bit 25 – NPEC Next PEC Request (SMBus Mode only)
| Value | Description |
|---|---|
| 0 | The next transfer does not use a PEC byte. |
| 1 | The next transfer uses a PEC byte. |
Bit 24 – NDIR Next Transfer Direction
| Value | Description |
|---|---|
| 0 | Write direction. |
| 1 | Read direction. |
Bits 23:16 – NDATAL[7:0] Next Data Length
| Value | Description |
|---|---|
| 0 | No data to send (see Alternative Command). |
| 1–255 | Number of bytes to send for the next transfer. |
Bit 9 – PEC PEC Request (SMBus Mode only)
| Value | Description |
|---|---|
| 0 | The transfer does not use a PEC byte. |
| 1 | The transfer uses a PEC byte. |
Bit 8 – DIR Transfer Direction
| Value | Description |
|---|---|
| 0 | Write direction. |
| 1 | Read direction. |
Bits 7:0 – DATAL[7:0] Data Length
| Value | Description |
|---|---|
| 0 | No data to send (see Alternative Command). |
| 1–255 | Number of bytes to send during the transfer. |