Datasheet

© 2007 Microchip Technology Inc. Preliminary DS39625C-page 301
PIC18F2585/2680/4585/4680
REGISTER 23-35: BnDLC: TX/RX BUFFER n DATA LENGTH CODE REGISTERS IN TRANSMIT MODE
[0 ≤ n ≤ 5, TXnEN (BSEL<n>) = 1]
(1)
REGISTER 23-36: BSEL0: BUFFER SELECT REGISTER 0
(1)
U-0 R/W-x U-0 U-0 R/W-x R/W-x R/W-x R/W-x
—TXRTR— — DLC3 DLC2 DLC1 DLC0
bit 7 bit 0
bit 7 Unimplemented: Read as ‘0’
bit 6 TXRTR: Transmitter Remote Transmission Request bit
1 = Transmitted message will have RTR bit set
0 = Transmitted message will have RTR bit cleared
bit 5-4 Unimplemented: Read as ‘0’
bit 3-0 DLC3:DLC0: Data Length Code bits
1111-1001 = Reserved
1000 = Data length = 8 bytes
0111 = Data length = 7 bytes
0110 = Data length = 6 bytes
0101 = Data length = 5 bytes
0100 = Data length = 4 bytes
0011 = Data length = 3 bytes
0010 = Data length = 2 bytes
0001 = Data length = 1 bytes
0000 = Data length = 0 bytes
Note 1: These registers are available in Mode 1 and 2 only.
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-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
B5TXEN B4TXEN B3TXEN B2TXEN B1TXEN B0TXEN
— —
bit 7 bit 0
bit 7-2 B5TXEN:B0TXEN: Buffer 5 to Buffer 0 Transmit Enable bit
1 = Buffer is configured in Transmit mode
0 = Buffer is configured in Receive mode
bit 1-0 Unimplemented: Read as ‘0’
Note 1: This register is available in Mode 1 and 2 only.
.
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