PIC18FXX8 Datasheet, PDF (202/402 Pages) Microchip Technology – 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

PIC18FXX8
FIGURE 19-1:
BUFFERS
CAN BUFFERS AND PROTOCOL ENGINE BLOCK DIAGRAM
Accept _{Acceptance Mask}
RXM1
Message
Request
Message
Queue
Control
TXREQ
TXABT
TXLARB
TXERR
TXBUFF
TXREQ
TXABT
TXLARB
TXERR
TXBUFF
TXREQ
TXABT
TXLARB
TXERR
TXBUFF
TXB0
MESSAGE
TXB1
MESSAGE
TXB2
MESSAGE
Transmit Byte Sequencer
Accept
Acceptance Mask
RXM0
Acceptance Filter
RXF0
Acceptance Filter
RXF1
Acceptance Filter
RXM2
Acceptance Filter
RXF3
Acceptance Filter
RXF4
Acceptance Filter
RXF5
Identifier
RXB0
Data and
Identifier
Data and
Identifier
RXB1
Identifier
Message Assembly Buffer
PROTOCOL
ENGINE
Transmit Shift
Receive Shift
Comparator
CRC Register
Transmit
Logic
Protocol
FSM
Bit Timing
Generator
Bit Timing
Logic
Transmit
Error
Counter
Receive
Error
Counter
RXERRCNT
Bus-Off
Err-Pas
TXERRCNT
TX
RX
DS41159D-page 200
 2004 Microchip Technology Inc.