PIC18F4685-ISLASHSP datasheet(293/484 Pages) MICROCHIP

293 / 484 page

Preliminary

DS39761B-page 291

PIC18F2682/2685/4682/4685

bit 2-0

Mode 0:

FILHIT2:FILHIT0: Filter Hit bits

These bits indicate which acceptance filter enabled the last message reception into Receive Buffer 1.

111

= Reserved

110

= Reserved

101

= Acceptance Filter 5 (RXF5)

100

= Acceptance Filter 4 (RXF4)

011

= Acceptance Filter 3 (RXF3)

010

= Acceptance Filter 2 (RXF2)

001

= Acceptance Filter 1 (RXF1), only possible when RXB0DBEN bit is set

000

= Acceptance Filter 0 (RXF0), only possible when RXB0DBEN bit is set

Mode 1, 2:

FILHIT2:FILHIT0 Filter Hit bits <2:0>

These bits, in combination with FILHIT<4:3>, indicate which acceptance filter enabled the message

reception into this receive buffer.

01111

= Acceptance Filter 15 (RXF15)

01110

= Acceptance Filter 14 (RXF14)

...

00000

= Acceptance Filter 0 (RXF0)

Note 1:

This bit is set by the CAN module upon receiving a message and must be cleared by software after the

buffer is read. As long as RXFUL is set, no new message will be loaded and buffer will be considered full.

HIGH BYTE [0

≤ n ≤ 1]

R-x

SID10

SID9

SID8

SID7

SID6

SID5

SID4

SID3

bit 7

bit 0

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

bit 7-0

SID10:SID3: Standard Identifier bits (if EXID (RXBnSIDL<3>) = 0)

Extended Identifier bits EID28:EID21 (if EXID = 1).

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