EP80579 Datasheet, PDF (1591/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
39.6.1.5
Offset 00000010h: Command - Operating Modes
The CAN unit can be used in different operating modes. By disabling transmitting data,
it is possible to use the CAN in listen-only mode. This allows for features such as
automatic bit rate detection.
Before starting the CAN controller, all CAN controller registers have to be set according
to the target application.
Table 39-10. Offset 00000010h: Command - Operating Modes
Description:
View: PCI 1
BAR: CSRBAR
Bus:Device:Function: M:4:0
Offset Start: 00000010h
Offset End: 00000013h
View: PCI 2
BAR: CSRBAR
Bus:Device:Function: M:5:0
Offset Start: 00000010h
Offset End: 00000013h
Size: 32 bit
Default: 00000000h
Power Well: Core
Bit Range
31 :02
01
00
Bit Acronym
Bit Description
Sticky
RSVD
listen
run_stop
Reserved, these bits are always 0
Listen mode:
‘0’ = Active
‘1’ = CAN listen only: The output is held at ‘R’ level. The
CAN is only listening
Run/Stop mode:
‘0’ = Sets the CAN controller into stop mode. Read ‘0’
when stopped.
‘1’ = Sets the CAN controller into run mode. Read ‘1’ when
running
Bit Reset
Value
0h
0b
0b
Bit Access
RO
RW
RW
Note:
The run/stop bit [00] can not be written from RUN mode to STOP mode while a
message is pending in the TX buffer. The stalled packet can be dequeued first using the
ABORT bit in the buffer prior to setting the mode to STOP. If the requirement is to
retain the TX packet in the buffer, transitioning to LISTEN mode first by setting bit [1]
will allow the controller to then transition to STOP mode. The packet will then remain in
the buffer if the controller is transitioned back to RUN mode.
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
1591