s5920 Applied Micro Circuits Corporation (AMCC), s5920 Datasheet - Page 81

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

S5920 – PCI Product: Operation Registers
ADD-ON BUS OPERATION REGISTERS
The Add-On bus interface provides access to 8
DWORDs of data, control and status information. All of
these locations are accessed by asserting the Add-On
bus chip select pin (SELECT#) and the byte-enable
pins (BE[3:0]), in conjunction with either the read or
write control enables (signal pin RD# or WR#). All reg-
isters are accessed with signals synchronous to the
Add-On clock.
Table 44. Operation Registers - Add-On Interface
AMCC Confidential and Proprietary
Address
0Ch
1Ch
2Ch
3Ch
28h
34h
38h
60h
Abbreviation
AMBEF
APTCR
AOMB
ARCR
APTD
AIMB
APTA
AINT
Add-On Incoming Mailbox Register
Add-On Outgoing Mailbox Register
Add-On Pass-Thru Address Register
Add-On Pass-Thru Data Register
Add-On Mailbox Empty/Full Status Register
Add-On Interrupt Control/Status Register
Add-On Reset Control Register
Add-On Pass-Thru Configuration Register
This register group represents the primary method for
communication between the Add-On and PCI buses
as viewed by the Add-On. The flexibility of this
arrangement allows a number of user-defined soft-
ware protocols to be built. One should NOT read/write
from any undefined address, or the read results and
write effects cannot be guaranteed. Table 6 lists the
Add-On Bus Operation Registers.
Register Name
Revision 1.02 – April 12, 2007
Data Book
DS1596
81