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MCP2515
REGISTER 4-3:
BFPCTRL – RXnBF PIN CONTROL AND STATUS
(ADDRESS: 0Ch)
U-0
—
U-0
—
R/W-0
B1BFS
R/W-0
B0BFS
R/W-0
B1BFE
R/W-0
B0BFE
R/W-0
B1BFM
R/W-0
B0BFM
bit 7
Legend:
bit 0
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 7-6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Unimplemented: Read as ‘ 0 ’
B1BFS: RX1BF Pin State bit (Digital Output mode only)
- Reads as ‘ 0 ’ when RX1BF is configured as interrupt pin
B0BFS: RX0BF Pin State bit (Digital Output mode only)
- Reads as ‘ 0 ’ when RX0BF is configured as interrupt pin
B1BFE: RX1BF Pin Function Enable bit
1 = Pin function enabled, operation mode determined by B1BFM bit
0 = Pin function disabled, pin goes to high-impedance state
B0BFE: RX0BF Pin Function Enable bit
1 = Pin function enabled, operation mode determined by B0BFM bit
0 = Pin function disabled, pin goes to high-impedance state
B1BFM: RX1BF Pin Operation mode bit
1 = Pin is used as interrupt when valid message loaded into RXB1
0 = Digital Output mode
B0BFM: RX0BF Pin Operation mode bit
1 = Pin is used as interrupt when valid message loaded into RXB0
0 = Digital Output mode
REGISTER 4-4:
RXBnSIDH – RECEIVE BUFFER n STANDARD IDENTIFIER HIGH
(ADDRESS: 61h, 71h)
R-x
SID10
R-x
SID9
R-x
SID8
R-x
SID7
R-x
SID6
R-x
SID5
R-x
SID4
R-x
SID3
bit 7
Legend:
bit 0
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 7-0
SID<10:3>: Standard Identifier bits
These bits contain the eight Most Significant bits of the Standard Identifier for the received message
? 2003-2012 Microchip Technology Inc.
DS21801G-page 29
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