s5935qrc Applied Micro Circuits Corporation (AMCC), s5935qrc Datasheet - Page 38

• Manufacturer Part Number: s5935qrc
• Description: Pci Product
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

S5935 – PCI Product
PCI STATUS REGISTER (PCISTS)
Figure 11. PCI Status Register
38
Register Name
Address Offset
Power-up value
Boot-load
Attribute
Size
15
X
DS1527
14
X
13
X
PCI Status
06h-07h
0080h
not used
Read Only (RO), Read/Write Clear
(R/WC)
16 bits
12
X
11
X
10
0
0
9
8
X
0
70
6
This 16-bit register contains the PCI status informa-
tion. The function of this register is defined by the PCI
specification and its implementation is required of all
PCI devices. Only some of the bits are used by this
device; those which are not used are hardwired to 0.
Most status bits within this register are designated as
“write clear,” meaning that in order to clear a given bit,
the bit must be written as a 1. All bits written with a 0
are left unchanged. These bits are identified in Figure
4 as (R/WC). Those which are Read Only are shown
as (RO) in Figure 4.
Reserved (RO) = 00's
Revision 1.02 – June 27, 2006
Reserved (RO)
Fast Back-to-Back (RO)
Data Parity Reported (R/WC)
DEVSEL# Timing Status (RO)
Signaled Target Abort (R/WC)
Received Target Abort (R/WC)
Received Master Abort (R/WC)
Signaled System Error (R/WC)
Detected Parity Error (R/WC)
AMCC Confidential and Proprietary
0 0 = Fast (S5933)
0 1 = Medium
1 0 = Slow
1 1 = Reserved
Data Book