MCP2510 Datasheet, PDF (24/76 Pages) Microchip Technology – Stand-Alone CAN Controller with SPI Interface

MCP2510
U-0
—
bit 7
R/W-0 R/W-0
RXM1 RXM0
U-0
R-0 R/W-0 R-0
R-0
— RXRTR BUKT BUKT1 FILHIT0
bit 0
bit 7: Unimplemented: Reads as ‘0’
R = Readable bit
W = Writable bit
C = Bit can be cleared by
MCU but not set
U = Unimplemented -
reads as ‘0’
- n = Value at POR reset
bit 6-5: RXM<1:0>: Receive Buffer Operating Mode
11 = Turn mask/filters off; receive any message
10 = Receive only valid messages with extended identifiers that meet filter criteria
01 = Receive only valid messages with standard identifiers that meet filter criteria
00 = Receive all valid messages using either standard or extended identifiers that meet filter criteria
bit 4: Unimplemented: Reads as ‘0’
bit 3: RXRTR: Received Remote Transfer Request
1 = Remote Transfer Request Received
0 = No Remote Transfer Request Received
bit 2: BUKT: Rollover Enable
1 = RXB0 message will rollover and be written to RXB1 if RXB0 is full
0 = Rollover disabled
bit 1: BUKT1: Read Only Copy of BUKT Bit (used internally by the MCP2510).
bit 0: FILHIT<0>: Filter Hit - indicates which acceptance filter enabled reception of message
1 = Acceptance Filter 1 (RXF1)
0 = Acceptance Filter 0 (RXF0)
Note: If a rollover from RXB0 to RXB1 occurs, the FILHIT bit will reflect the filter that accepted the mes-
sage that rolled over
REGISTER 4-1: RXB0CTRL - Receive Buffer 0 Control Register (ADDRESS: 60h)
DS21291C-page 24
Preliminary
 2000 Microchip Technology Inc.