22.6.2 DBGU Mode Register
| Name: | DBGU_MR |
| Offset: | 0x0004 |
| Reset: | 0x0000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| CHMODE[1:0] | BRSRCCK | PAR[2:0] | |||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | |||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| FILTER | |||||||||
| Access | R/W | ||||||||
| Reset | 0 |
Bits 15:14 – CHMODE[1:0] Channel Mode
| Value | Name | Description |
|---|---|---|
| 0 | NORMAL | Normal mode |
| 1 | AUTOMATIC | Automatic echo |
| 2 | LOCAL_LOOPBACK | Local loopback |
| 3 | REMOTE_LOOPBACK | Remote loopback |
Bit 12 – BRSRCCK Baud Rate Source Clock
0 (PERIPH_CLK): The baud rate is driven by the peripheral clock
1 (GCLK): The baud rate is driven by a PMC-programmable clock GCLK (see section Power Management Controller (PMC)).
Bits 11:9 – PAR[2:0] Parity Type
| Value | Name | Description |
|---|---|---|
| 0 | EVEN | Even Parity |
| 1 | ODD | Odd Parity |
| 2 | SPACE | Space: parity forced to 0 |
| 3 | MARK | Mark: parity forced to 1 |
| 4 | NO | No parity |
Bit 4 – FILTER Receiver Digital Filter
0 (DISABLED): DBGU does not filter the receive line.
1 (ENABLED): DBGU filters the receive line using a three-sample filter (16x-bit clock) (2 over 3 majority).