S5935QF Applied Micro Circuits Corporation, S5935QF Datasheet - Page 81
S5935QF
Manufacturer Part Number
S5935QF
Description
Manufacturer
Applied Micro Circuits Corporation
Datasheet
1.S5935QF.pdf
(204 pages)
Specifications of S5935QF
Package Type
PQFP
Rad Hardened
No
Lead Free Status / Rohs Status
Not Compliant
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S5935 – PCI Product
ADD-ON EMPTY/FULL STATUS REGISTER
(AMBEF)
Figure 34. Add-On Mailbox Empty/Full Status Register
AMCC Confidential and Proprietary
Register Name
Add-On
Address Offset
Power-up value
Attribute
Size
31
Add-On Mailbox Empty/Full Status
34h
00000000h
Read Only
32 bits
16
15
This register provides empty/full visibility of each byte
within the mailboxes. The empty/full status for the Out-
going mailboxes are displayed on the high order 16
bits and the empty/full status for the incoming mail-
boxes are presented on the low order 16 bits. A value
of one signifies that a given mailbox had been written
by the sourcing interface but had not yet been read by
the corresponding destination interface. An incoming
mailbox is defined as one in which data travels from
the PCI bus into the Add-On bus and an outgoing mail-
box is defined as one where data goes OUT from the
Add-On bus to the PCI interface.
Revision 1.02 – June 27, 2006
0
Bit
Value
Incoming Mailbox
Status (RO)
Outgoing Mailbox
Status (RO)
Data Book
DS1527
81
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