EP80579 Datasheet, PDF (1587/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
39.6.1
Detailed Register Descriptions
This section shows all internal registers and describes how the CAN unit can be used
and programmed.
39.6.1.1
Offset 00000000h: Int_status - Interrupt Status Register
The interrupt controller contains an interrupt status and an interrupt enable register.
The interrupt status register stores internal interrupt events. Once a bit is set, it
remains set until it is cleared by writing a '1' to it. The interrupt enable register has no
effect on the interrupt status register.
The interrupt enable register controls which particular bits from the interrupt status
register are used to assert the interrupt output int_n. int_n is asserted if a particular
interrupt status bit and the respective enable bit are set.
Table 39-6. Offset 00000000h: Int_Status - Interrupt Status Register
Description:
View: PCI 1
BAR: CSRBAR
Bus:Device:Function: M:4:0
Offset Start: 00000000h
Offset End: 00000003h
View: PCI 2
BAR: CSRBAR
Bus:Device:Function: M:5:0
Offset Start: 00000000h
Offset End: 00000003h
Size: 32 bit
Default: 00000000h
Power Well: Core
Bit Range
31 :13
12
11
10
09
08
07
06
05
04
03
02
01 :00
Bit Acronym
Bit Description
Sticky
Reserved Reserved
N
rx_msg Indicates that a message was received.
N
tx_msg
Indicates that a message was sent.
N
rx_msg_loss
Is set when a new message arrives but the RxMessage
flag MsgAv is set
N
bus_off The CAN has reached the bus off state
N
crc_err
An crc error occured while receiving or transmitting data
N
form_err A form error occured while receiving or transmitting data. N
ack_err An acknowledge error occured while transmitting data
N
stuff_err A stuff error occured while transmitting data
N
bit_err
A bit error occured while receiving or transmitting data
N
ovr_load An overload condition has occured
N
ar_loss
The arbitration was lost while sending a message
N
Reserved Reserved
N
Bit Reset
Value
0h
0b
0b
0b
0b
0b
0b
0b
0b
0b
0b
0b
0h
Bit Access
RO
RWC
RWC
RWC
RWC
RWC
RWC
RWC
RWC
RWC
RWC
RWC
RV
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
1587