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18F8680 Datasheet(PDF) 308 Page - Microchip Technology

Part # 18F8680
Description  64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module
PDF  496 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

18F8680 Datasheet(HTML) 308 Page - Microchip Technology

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PIC18F6585/8585/6680/8680
DS30491C-page 306
 2004 Microchip Technology Inc.
23.2.3.2
Message Acceptance Filters
and Masks
This subsection describes the message acceptance
filters and masks for the CAN receive buffers.
REGISTER 23-37: RXFnSIDH: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER
REGISTERS, HIGH BYTE [0
≤ n ≤ 15](1)
REGISTER 23-38: RXFnSIDL: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER
REGISTERS, LOW BYTE [0
≤ n ≤ 15](1)
Note:
These
registers
are
writable
in
Configuration mode only.
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
SID10
SID9
SID8
SID7
SID6
SID5
SID4
SID3
bit 7
bit 0
bit 7-0
SID10:SID3: Standard Identifier Filter bits, if EXIDEN = 0;
Extended Identifier Filter bits EID28:EID21, if EXIDEN = 1.
Note 1: Registers RXF6SIDH:RXF15SIDH 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-x
R/W-x
R/W-x
U-0
R/W-x
U-0
R/W-x
R/W-x
SID2
SID1
SID0
—
EXIDEN
—EID17
EID16
bit 7
bit 0
bit 7-5
SID2:SID0: Standard Identifier Filter bits, if EXIDEN = 0;
Extended Identifier Filter bits EID20:EID18, if EXIDEN = 1.
bit 4
Unimplemented: Read as ‘0’
bit 3
EXIDEN: Extended Identifier Filter Enable bit
1
= Filter will only accept extended ID messages
0
= Filter will only accept standard ID messages
Note:
In Mode 0, this bit must be set/cleared as required, irrespective of corresponding
mask register value.
bit 2
Unimplemented: Read as ‘0’
bit 1-0
EID17:EID16: Extended Identifier Filter bits
Note 1: Registers RXF6SIDL:RXF15SIDL 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



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