MCP2515
REGISTER 4-2:
RXB1CTRL – RECEIVE BUFFER 1 CONTROL
(ADDRESS: 70h)
U-0
—
R/W-0
RXM1
R/W-0
RXM0
U-0
—
R-0
R-0
R-0
R-0
RXRTR
FILHIT2
FILHIT1
FILHIT0
bit 7
bit 0
bit 7
Unimplemented: Read as ‘0’
bit 6-5
RXM: Receive Buffer Operating Mode bits
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
bit 3
Unimplemented: Read as ‘0’
RXRTR: Received Remote Transfer Request bit
1 = Remote Transfer Request Received
0 = No Remote Transfer Request Received
bit 2-0
FILHIT: Filter Hit bits - indicates which acceptance filter enabled reception of message
101= Acceptance Filter 5 (RXF5)
100= Acceptance Filter 4 (RXF4)
011= Acceptance Filter 3 (RXF3)
010= Acceptance Filter 2 (RXF2)
001= Acceptance Filter 1 (RXF1) (Only if BUKT bit set in RXB0CTRL)
000= Acceptance Filter 0 (RXF0) (Only if BUKT bit set in RXB0CTRL)
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
‘1’ = Bit is set
DS21801D-page 28
Preliminary
© 2005 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
