Datasheet

MCP2510
DS21291F-page 20 © 2007 Microchip Technology Inc.
REGISTER 3-7: TXBNDLC - Transmit Buffer N Data Length Code
(ADDRESS: 35h, 45h, 55h)
REGISTER 3-8: TXB
NDM - Transmit Buffer N Data Field Byte m
(ADDRESS: 36h-3Dh, 46h-4Dh, 56h-5Dh)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
—RTR— — DLC3DLC2DLC1DLC0
bit 7 bit 0
bit 7 Unimplemented: Reads as '0’
bit 6 RTR: Remote Transmission Request Bit
1 = Transmitted Message will be a Remote Transmit Request
0 = Transmitted Message will be a Data Frame
bit 5-4 Unimplemented: Reads as '0’
bit 3-0 DLC<3:0>: Data Length Code
Sets the number of data bytes to be transmitted (0 to 8 bytes)
Note: It is possible to set the DLC to a value greater than 8, however only 8 bytes are trans-
mitted
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
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
TXB
NDm
7
TXBNDm
6
TXBNDm
5
TXBNDm
4
TXBNDm
3
TXBNDm
2
TXBNDm
1
TXBNDm
0
bit 7 bit 0
bit 7-0 TXB
NDM7:TXBNDM0: Transmit Buffer N Data Field Byte m
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