
Publication No. 500-657806-000 Rev. G
Embedded PC/RTOS Features 41
3.2.3 Registers
Table 3-1 Configuration Registers
Offset
Register
Default
Type
00-01h
Vendor ID
8086h
Read Only
02-03h
Device ID
25ABh
Read Only
04-05h
Command Register (COM)
0000h
Read/Write
06-07h
Device Status Register (DS)
0280h
Read/Write Clear
08h
Revision ID Register (RID)
00h
Read Only
09h
Programming Interface register (PI)
00h
Read Only
0Ah
Sub Class Code Register (SCC)
80h
Read Only
0Bh
Base Class Code Register (BCC)
08h
Read Only
0Eh
Header Type Register (HEDT)
00h
Read Only
10-13h
Base Address Register
00000000h
Read/Write
14-2Bh
Reserved
00h
2C-2Dh
Subsystem Vendor ID
00h
Read/Write Once
2E-2F
Subsystem ID
00h
Read/Write Once
30-5F
Reserved
00h
60-61h
WDT Configuration
00h
Read/Write
64-67h
Reserved
0000h
68h
WDT Lock Register
00h
Read/Write
6C-F7
Reserved
00h
F8-FBh
Manufacturer’s ID
00000F66h
Read Only
FC-FFh
Reserved
00h
Table 3-2 Memory Mapped Registers
Offset
Register
Default
Type
Base + 00h
Preload Value 1
FFFFFh
Read/Write
Base + 04h
Preload Value 2
FFFFFh
Read/Write
Base + 08h
General Interrupt
Status
00h
Read/Write/Clear
Base + 0C
Reload Register
0000h
Write
Table 3-3 Vendor Identification Register (VID)
Offset
00h
Attribute
Read Only
Default Value
8086h
Size
16 bit
Lockable
No
Power Well
Core
Table 3-4 Device Identification Register (DID)
Offset
02h
Attribute
Read Only
Default Value
25ABh
Size
16 bit
Lockable
No
Power Well
Core