PIC18F6585/8585/6680/8680
DS30491C-page 288
2004 Microchip Technology Inc.
REGISTER 23-11: TXBnDLC: TRANSMIT BUFFER n DATA LENGTH CODE REGISTERS [0
n 2]
REGISTER 23-12: TXERRCNT: TRANSMIT ERROR COUNT REGISTER
U-0
R/W-x
U-0
R/W-x
—TXRTR
DLC3
DLC2
DLC1
DLC0
bit 7
bit 0
bit 7
Unimplemented: Read as ‘0’
bit 6
TXRTR: Transmit Remote Frame Transmission Request bit
1
= Transmitted message will have TXRTR bit set
0
= Transmitted message will have TXRTR bit cleared
bit 5-4
Unimplemented: Read as ‘0’
bit 3-0
DLC3:DLC0: Data Length Code bits
1111
= Reserved
1110
= Reserved
1101
= Reserved
1100
= Reserved
1011
= Reserved
1010
= Reserved
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
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-0
TEC7
TEC6
TEC5
TEC4
TEC3
TEC2
TEC1
TEC0
bit 7
bit 0
bit 7-0
TEC7:TEC0: Transmit Error Counter bits
This register contains a value which is derived from the rate at which errors occur. When the
error count overflows, the bus-off state occurs. When the bus has 128 occurrences of
11 consecutive recessive bits, the counter value is cleared.
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
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