S5920Q Applied Micro Circuits Corporation, S5920Q Datasheet - Page 73

• Manufacturer Part Number: S5920Q
• Manufacturer: Applied Micro Circuits Corporation

Specifications of S5920Q

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Package Type: PQFP
• Rad Hardened: No
• Lead Free Status / Rohs Status: Not Compliant

S5920 – PCI Product: Operation Registers
PCI INCOMING MAILBOX REGISTER (IMB)
Figure 27. Incoming Mailbox
AMCC Confidential and Proprietary
Register Names:
PCI Address Offset:
Power-up value:
PCI Attribute:
Size:
31
Byte 3
24
Incoming Mailbox
1Ch
Undefined
Read Only
32 bits
23
Byte 2
16
15
This DWORD register provides a method for receiving
user-defined status or parameter data from the Add-
On bus. PCI bus transactions to this register may be of
any width (byte, word, or DWORD). Only read opera-
tions are supported from this register. Reading from
this register can be a source for Add-On bus interrupt
by enabling interrupt generation through the use of the
Add-On Interrupt Control/Status Register. Byte 3 of
this mailbox can also be controlled via external hard-
ware from the Add-On bus. This register is also
referred to as the Add-On Outgoing Mailbox Register
AOMB).
Byte 1
8
Revision 1.02 – April 12, 2007
7
Byte 0
Data Book
DS1596
0
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