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PIC18F2680ISOSQTP Folha de dados(PDF) 330 Page - Microchip Technology

Nome de Peças PIC18F2680ISOSQTP
Descrição Electrónicos  28/40/44-Pin Enhanced Flash Microcontrollers with ECAN??Technology, 10-Bit A/D and nanoWatt Technology
PDF  482 Pages
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Fabricante Electrônico  MICROCHIP [Microchip Technology]
Página de início  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F2680ISOSQTP Folha de dados(HTML) 330 Page - Microchip Technology

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PIC18F2585/2680/4585/4680
DS39625C-page 328
Preliminary
© 2007 Microchip Technology Inc.
23.6.3
TRANSMIT PRIORITY
Transmit
priority
is
a
prioritization
within
the
PIC18F2585/2680/4585/4680 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
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.
FIGURE 23-2:
TRANSMIT BUFFERS
TXB0
Message
Queue
Control
Transmit Byte Sequencer
TXB1
TXB2
TXB3 - TXB8



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