Embedded PC/RTOS Features 41
3.3 Embedded PCI Functions
The VMIVME-7805/VME-7805RC provide nonvolatile 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.
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 PICMG
®
assigned Vendor ID (114A).
The “Subsystem ID” field indicates the model number of the product (7805).
Table 3-2 PCI Configuration Space Registers
31
16
15
00
Register
Address
Device ID 0004
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 VME Control registers (BAR0)
10h
PCI Base Address 1 for Memory-Mapped 32 KByte NVRAM (BAR1)
14h
PCI Base Address 2 for memory-mapped Watchdog and other timers (BAR2)
18h
Reserved
1Ch
Reserved
20h
Reserved
24h
Reserved
28h
Subsystem ID 7805
Subsystem Vendor ID 114A
2Ch
Reserved
30h
Reserved
34h
Reserved
38h
Max_Lat
Min_gnt
Interrupt Pin
Interrupt Line
3Ch