35.6.8.12 Length
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| Name: | LENGTH |
| Offset: | 0x22 |
| Reset: | 0x00 |
| Property: | Write-Synchronized |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| LENEN[1:0] | |||||||||
| Access | R/W | R/W | |||||||
| Reset | 0 | 0 | |||||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| LEN[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 | |
Bits 9:8 – LENEN[1:0] Data Length Enable
This bit field configures the length counter either for transmit or receive transactions.
| Value | Description |
|---|---|
| 0x0 | Length counter disabled |
| 0x1 | Length counter enabled for transmit |
| 0x2 | Length counter enabled from receive |
| 0x3 | Reserved |
Note: These bits are only valid in 32-bit Extension mode, CTRLC.DATA32B = 1.
Bits 7:0 – LEN[7:0] Data Length
This bit field configures the data length after which the flags INTFLAG.RXC (when LENEN = 0x2) or INTFLAG.DRE (when LENEN = 0x1) are raised.
| Value | Description |
|---|---|
| 0x0 | Reserved if LENEN = 0x1 or LENEN = 0x2 |
| 0x01 – 0xFF | Data Length |
Note: These bits are only valid in 32-bit Extension mode, CTRLC.DATA32B = 1.