32.5.9 Transfer Control Register
This register can only be written if the WPCREN bit is cleared in the Write Protection Mode Register.
| Name: | PERIPH_PTCR |
| Offset: | 0x20 |
| Reset: | – |
| Property: | Write-only |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| ERRCLR | |||||||||
| Access | W | ||||||||
| Reset | – |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| TXCBDIS | TXCBEN | RXCBDIS | RXCBEN | ||||||
| Access | W | W | W | W | |||||
| Reset | – | – | – | – |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| TXTDIS | TXTEN | ||||||||
| Access | W | W | |||||||
| Reset | – | – |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| RXTDIS | RXTEN | ||||||||
| Access | W | W | |||||||
| Reset | – | – |
Bit 24 – ERRCLR Transfer Bus Error Clear
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Clears the transfer bus error status bit. |
Bit 19 – TXCBDIS Transmitter Circular Buffer Disable
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Enables the PDC circular buffer for the transmitter operation. |
Bit 18 – TXCBEN Transmitter Circular Buffer Enable
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Enables the PDC circular buffer for the transmitter operation. |
Bit 17 – RXCBDIS Receiver Circular Buffer Disable
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Disables the PDC circular buffer for the receiver operation. |
Bit 16 – RXCBEN Receiver Circular Buffer Enable
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Enables the PDC circular buffer for the receiver operation. |
Bit 9 – TXTDIS Transmitter Transfer Disable
When a half-duplex peripheral is connected to the PDC, disabling the transmitter channel requests disables the receiver channel requests.
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Disables the PDC transmitter channel requests. |
Bit 8 – TXTEN Transmitter Transfer Enable
When a half-duplex peripheral is connected to the PDC, it enables the transmitter channel requests only if RXTEN is not set. It is forbidden to set both TXTEN and RXTEN for a half-duplex peripheral.
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Enables the PDC transmitter channel requests. |
Bit 1 – RXTDIS Receiver Transfer Disable
When a half-duplex peripheral is connected to the PDC, disabling the receiver channel requests also disables the transmitter channel requests.
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Disables the PDC receiver channel requests. |
Bit 0 – RXTEN Receiver Transfer Enable
When a half-duplex peripheral is connected to the PDC, enabling the receiver channel requests automatically disables the transmitter channel requests. It is forbidden to set both TXTEN and RXTEN for a half-duplex peripheral.
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Enables PDC receiver channel requests if RXTDIS is not set. |