46.10.34 USART LON Mode Register
This register is relevant only if USART_MODE = 0x9 in the USART Mode Register.
This register can only be written if the WPEN bit is cleared in the USART Write Protection Mode Register.
| Name: | FLEX_US_LONMR |
| Offset: | 0x260 |
| Reset: | 0x00000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| EOFS[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 | |
| Access | |||||||||
| Reset |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| LCDS | DMAM | CDTAIL | TCOL | COLDET | COMMT | ||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 |
Bits 23:16 – EOFS[7:0] End of Frame Condition Size
| Value | Description |
|---|---|
| 0–255 |
Defines the minimum transitionless time for the IP to detect a LON end of frame condition. teof = (EOFS+1) × tclock × 8 × (2- OVER) |
Bit 5 – LCDS LON Collision Detection Source
| Value | Description |
|---|---|
| 0 |
LON collision detection source is external. |
| 1 |
LON collision detection source is internal. |
Bit 4 – DMAM LON DMA Mode
| Value | Description |
|---|---|
| 0 |
The LON data length register FLEX_US_LONDL is not written by the DMA. |
| 1 |
The LON data length register FLEX_US_LONDL is written by the DMA. |
Bit 3 – CDTAIL LON Collision Detection on Frame Tail
| Value | Description |
|---|---|
| 0 |
Detect collisions after CRC has been sent but prior end of transmission in LON comm_type = 1 mode. |
| 1 |
Ignore collisions after CRC has been sent but prior end of transmission in LON comm_type = 1 mode. |
Bit 2 – TCOL Terminate Frame upon Collision Notification
| Value | Description |
|---|---|
| 0 |
Do not terminate the frame in LON comm_type = 1 mode upon collision detection. |
| 1 |
Terminate the frame in LON comm_type = 1 mode upon collision detection if possible. |
Bit 1 – COLDET LON Collision Detection Feature
| Value | Description |
|---|---|
| 0 |
LON collision detection feature disabled. |
| 1 |
LON collision detection feature enabled. |
Bit 0 – COMMT LON comm_type Parameter Value
| Value | Description |
|---|---|
| 0 |
LON comm_type = 1 mode. |
| 1 |
LON comm_type = 2 mode. |