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44 V7865 Hardware Reference Manual
3.2 Embedded PCI Functions
The V7865 provides non-volatile RAM (NVRAM), Timers and a Watchdog Timer
via the PCI bus. These functions are required for embedded and real time
applications. The PCI configuration space of these embedded functions are shown
below.
Table 3-1 PCI Configuration Space Registers
The “Device ID” field indicates that the device is for VME products (00) and
indicates the supported embedded feature set.
The “Vendor ID” and “Subsystem Vendor ID” fields indicate GE Intelligent
Platforms’ PICMG
®
assigned Vendor ID (114A).
The “Subsystem ID” field indicates the model number of the product (7865).
NOTE
V7865 boards with the 3 GByte memory option will begin to lose access to the physical memory if
more than 128 MByte is chosen for VME.
31
16
15
00
Register Address
Device ID 6504
Vendor ID 114A
00h
Status
Command
04h
Class Code
Revision ID
08h
BIST
Header Type
Latency Timer
Cache Line Size
0Ch
PCI Base Address 0 for Memory-Mapped 32KB NVRAM (BAR0)
10h
PCI Base Address 1 for Memory-Mapped Watchdog and other timers (BAR1)
14h
Reserved
18h
Reserved
1Ch
Reserved
20h
Reserved
24h
Reserved
28h
Subsystem ID 7865
Subsystem Vendor ID 114A
2Ch
Reserved
30h
Reserved
34h
Reserved
38h
Max_Lat
Min_gnt
Interrupt Pin
Interrupt Line
3Ch
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