PIC18F2680ISPSQTP datasheet(291/482 Pages) MICROCHIP

291 / 482 page

Preliminary

DS39625C-page 289

PIC18F2585/2680/4585/4680

Mode 0

R/C-0

R/W-0

U-0

R-0

R/W-0

R-0

RXFUL(1)

RXM1

RXM0

—

RXRTRRO

FILHIT2

FILHIT1

FILHIT0

Mode 1, 2

R/C-0

R/W-0

R-0

RXFUL(1)

RXM1

RTRRO

FILHIT4

FILHIT3

FILHIT2

FILHIT1

FILHIT0

bit 7

bit 0

bit 7

RXFUL: Receive Full Status bit(1)

= Receive buffer contains a received message

= Receive buffer is open to receive a new message

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.

bit 6

Mode 0:

RXM1: Receive Buffer Mode bit 1

Combines with RXM0 to form RXM<1:0> bits (see bit 5).

= Receive all messages (including those with errors); filter criteria is ignored

= Receive only valid messages with extended identifier; EXIDEN in RXFnSIDL must be ‘1’

= Receive only valid messages with standard identifier, EXIDEN in RXFnSIDL must be ‘0’

= Receive all valid messages as per EXIDEN bit in RXFnSIDL register

Mode 1, 2:

RXM1: Receive Buffer Mode bit

= Receive all messages (including those with errors); acceptance filters are ignored

= Receive all valid messages as per acceptance filters

bit 5

Mode 0:

RXM0: Receive Buffer Mode bit 0

Combines with RXM1 to form RXM<1:0> bits (see bit 6).

Mode 1, 2:

RTRRO: Remote Transmission Request bit for Received Message (read-only)

= A remote transmission request is received

= A remote transmission request is not received

bit 4

Mode 0:

Unimplemented: Read as ‘0’

Mode 1, 2:

FILHIT4: Filter Hit bit 4

This bit combines with other bits to form filter acceptance bits <4:0>.

bit 3

Mode 0:

RXRTRRO: Remote Transmission Request bit for Received Message (read-only)

= A remote transmission request is received

= A remote transmission request is not received

Mode 1, 2:

FILHIT3: Filter Hit bit 3

This bit combines with other bits to form filter acceptance bits <4:0>.

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