s5920 Applied Micro Circuits Corporation (AMCC), s5920 Datasheet - Page 75

• Manufacturer Part Number: s5920
• Description: Pci Product
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

S5920 – PCI Product: Operation Registers
PCI INTERRUPT CONTROL/STATUS REG-
ISTER (INTCSR)
Figure 29. Interrupt Control Status Register
AMCC Confidential and Proprietary
Register Name:
PCI Address Offset:
Power-up value:
PCI Attribute:
Size:
Interrupt Asserted (RO)
Add-On Interrupt Pin
(ADDINT#) Status (RO)
Incoming Mailbox
Interrupt (R/WC)
Outgoing Mailbox
Interrupt (R/WC)
Add-On Interrupt Pin
(R/W)
(ADDINT#) Enable
3
1
00000000
Interrupt Control and Status
38h
00000C0Ch
Read/Write, Read/Write Clear
32 bits
2
4
2
3
X
X
2
2
Actual Interrupt
0
2
1
0 0 0 X X 0 0 X X 1 1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9
This register configures the conditions which will pro-
duce an interrupt on the PCI bus interface, a method
for viewing the cause of the interrupt, and a method for
acknowledging (removing) the interrupt’s assertion.
Interrupt sources:
Interrupt Selection
XX
D8 - D12 PCI Incoming Mailbox
D12 = Enable Interrupt
D9 - D8 = Byte Number
•
•
•
00 = Byte 0
01 = Byte 1
10 = Byte 2
11 = Byte 3
8
75
The Outgoing mailbox becomes empty.
The Incoming mailbox becomes full.
Add-On interrupt pin enable and flag.
000
432
X 1 1
1
Revision 1.02 – April 12, 2007
XX
0
Interrupt Source (R/W)
Enable & Selection
D4 - D0 PCI Outgoing Mailbox
(Becomes Empty)
D4 = Enable Interrupt
D1 - D0 = Byte Number
00 = Byte 0
01 = Byte 1
10 = Byte 2
11 = Byte 3
Data Book
DS1596
75