PIC18F2480 MICROCHIP [Microchip Technology], PIC18F2480 Datasheet - Page 330

• Manufacturer Part Number: PIC18F2480
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2480/2580/4480/4580
23.6.3
Transmit
PIC18F2480/2580/4480/4580 devices of the pending
transmittable messages. This is independent from and
not related to any prioritization implicit in the message
arbitration scheme built into the CAN protocol. Prior to
sending the SOF, the priority of all buffers that are
queued for transmission is compared. The transmit
FIGURE 23-2:
DS39637A-page 328
Message
priority
Control
TRANSMIT PRIORITY
Queue
TXB0
is
TRANSMIT BUFFERS
a
prioritization
within
TXB1
Preliminary
the
Transmit Byte Sequencer
buffer with the highest priority will be sent first. If two
buffers have the same priority setting, the buffer with
the highest buffer number will be sent first. There are
four levels of transmit priority. If TXP bits for a particular
message buffer are set to ‘11’, that buffer has the high-
est possible priority. If TXP bits for a particular message
buffer are set to ‘00’, that buffer has the lowest possible
priority.
TXB2
 2004 Microchip Technology Inc.
TXB3 - TXB8