Datasheet

MCP2515

(ADDRESS: 2Dh)

R/W-0 R/W-0 R-0 R-0 R-0 R-0 R-0 R-0

RX1OVR RX0OVR TXBO TXEP RXEP TXWAR RXWAR EWARN

bit 7 bit 0

Legend:

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown

bit 7 RX1OVR: Receive Buffer 1 Overflow Flag bit

- Set when a valid message is received for RXB1 and CANINTF.RX1IF = 1

- Must be reset by MCU

bit 6 RX0OVR: Receive Buffer 0 Overflow Flag bit

- Set when a valid message is received for RXB0 and CANINTF.RX0IF = 1

- Must be reset by MCU

bit 5 TXBO: Bus-Off Error Flag bit

- Bit set when TEC reaches 255

- Reset after a successful bus recovery sequence

bit 4 TXEP: Transmit Error-Passive Flag bit

- Set when TEC is equal to or greater than 128

- Reset when TEC is less than 128

bit 3 RXEP: Receive Error-Passive Flag bit

- Set when REC is equal to or greater than 128

- Reset when REC is less than 128

bit 2 TXWAR: Transmit Error Warning Flag bit

- Set when TEC is equal to or greater than 96

- Reset when TEC is less than 96

bit 1 RXWAR: Receive Error Warning Flag bit

- Set when REC is equal to or greater than 96

- Reset when REC is less than 96

bit 0 EWARN: Error Warning Flag bit

- Set when TEC or REC is equal to or greater than 96 (TXWAR or RXWAR = 1)

- Reset when both REC and TEC are less than 96