45.7.35 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: | US_LONMR |
Offset: | 0x0060 |
Reset: | 0x0 |
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 | Define 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 US_LONDL is not written by the DMA. |
1 | The LON data length register 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. |