RXB0CTRL datasheet(49/92 Pages) MICROCHIP

49 / 92 page

 2003-2012 Microchip Technology Inc.

DS21801G-page 49

MCP2515

EFLG – ERROR FLAG

(ADDRESS: 2Dh)

R/W-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

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