
2004 Microchip Technology Inc.
Preliminary
DS39637A-page 305
PIC18F2480/2580/4480/4580
REGISTER 23-45: RXFCONn: RECEIVE FILTER CONTROL REGISTER n [0
≤
n
≤
1]
(1)
R/W-0
R/W-0
R/W-1
RXF7EN
RXF6EN
RXF5EN
REGISTER 23-46: SDFLC: STANDARD DATA BYTES FILTER LENGTH COUNT REGISTER
(1)
U-0
U-0
U-0
—
—
—
bit 7
RXFCON0
R/W-1
RXF4EN
R/W-1
RXF3EN
R/W-1
RXF2EN
R/W-1
RXF1EN
R/W-1
RXF0EN
RXFCON1
R/W-0
RXF15EN
bit 7
R/W-0
RXF14EN
R/W-0
RXF13EN RXF12EN RXF11EN RXF10EN
R/W-0
R/W-0
R/W-0
R/W-0
RXF9EN
R/W-0
RXF8EN
bit 0
bit 7-0
RXFnEN:
Receive Filter n Enable bits
0
= Filter is disabled
1
= Filter is enabled
Note 1:
This register is available in Mode 1 and 2 only.
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Note:
Registers 23-46 through 23-51are writable
in Configuration mode only.
R/W-0
FLC4
R/W-0
FLC3
R/W-0
FLC2
R/W-0
FLC1
R/W-0
FLC0
bit 0
bit 7-5
bit 4-0
Unimplemented:
Read as ‘
0
’
FLC4:FLC0:
Filter Length Count bits
Mode 0:
Not used; forced to ‘
00000
’.
00000
-
10010
=
0
18 bits are available for standard data byte filter. Actual number of bits
used depends on DLC3:DLC0 bits (RXBnDLC<3:0> or BnDLC<3:0> if
configured as RX buffer) of message being received.
If DLC3:DLC0 =
0000
No bits will be compared with incoming data bits
If DLC3:DLC0 =
0001
Up to 8 data bits of RXFnEID<7:0>, as determined by FLC2:FLC0, will
be compared with the corresponding number of data bits of the
incoming message
If DLC3:DLC0 =
0010
Up to 16 data bits of RXFnEID<15:0>, as determined by FLC3:FLC0,
will be compared with the corresponding number of data bits of the
incoming message
If DLC3:DLC0 =
0011
Up to 18 data bits of RXFnEID<17:0>, as determined by FLC4:FLC0,
will be compared with the corresponding number of data bits of the
incoming message
Note 1:
This register is available in Mode 1 and 2 only.
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown