MCP2515
REGISTER 3-2:
TXRTSCTRL – TXnRTS PIN CONTROL AND STATUS REGISTER
(ADDRESS: 0Dh)
U-0
—
U-0
—
R-x
R-x
R-x
R/W-0
R/W-0
R/W-0
B2RTS
B1RTS
B0RTS
B2RTSM
B1RTSM B0RTSM
bit 0
bit 7
bit 7
bit 6
bit 5
Unimplemented: Read as ‘0’
Unimplemented: Read as ‘0’
B2RTS: TX2RTS Pin State bit
- Reads state of TX2RTS pin when in Digital Input mode
- Reads as ‘0’ when pin is in ‘Request-to-Send’ mode
bit 4
bit 3
bit 2
bit 1
bit 0
B1RTS: TX1RTX Pin State bit
- Reads state of TX1RTS pin when in Digital Input mode
- Reads as ‘0’ when pin is in ‘Request-to-Send’ mode
B0RTS: TX0RTS Pin State bit
- Reads state of TX0RTS pin when in Digital Input mode
- Reads as ‘0’ when pin is in ‘Request-to-Send’ mode
B2RTSM: TX2RTS Pin mode bit
1= Pin is used to request message transmission of TXB2 buffer (on falling edge)
0= Digital input
B1RTSM: TX1RTS Pin mode bit
1= Pin is used to request message transmission of TXB1 buffer (on falling edge)
0= Digital input
B0RTSM: TX0RTS Pin mode bit
1= Pin is used to request message transmission of TXB0 buffer (on falling edge)
0= Digital input
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
REGISTER 3-3:
TXBnSIDH – TRANSMIT BUFFER n STANDARD IDENTIFIER HIGH
(ADDRESS: 31h, 41h, 51h)
R/W-x
SID10
R/W-x
SID9
R/W-x
SID8
R/W-x
SID7
R/W-x
SID6
R/W-x
SID5
R/W-x
SID4
R/W-x
SID3
bit 7
bit 0
bit 7-0
SID: Standard Identifier bits <10:3>
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
© 2005 Microchip Technology Inc.
Preliminary
DS21801D-page 19
MICROCHIP [ MICROCHIP ]
