84 SBC329 3U VPX Single Board Computer
Publication No. SBC329-HRM/1
6.8 BIT Control and Status Register (0x629)
Bits
Read/Write Description
Default
7
Read/Write
HRESET request:
1 = Board reset requested
0 = Board reset not requested
0
6 and 5
Read/Write
BIT run status:
00 = BIT not previously run
01 = Fast BIT performed
10 = Full BIT performed
11 = Fast Start performed
00
b
(sticky when reset using
HRESET request)
4
Read/Write
BIT pass/fail:
1 = BIT failed
0 = BIT passed
1
(sticky when reset using
HRESET request)
3
Read/Write
Fast BIT:
1 = Fast BIT enabled (via BIOS setting)
0 = Fast BIT disabled
0
2
Read/Write
Fast Start:
1 = Fast Start enabled (via BIOS setting)
0 = Fast Start disabled
0
1
Read only
Reserved
0
0
Read/Write
BIT run:
1 = BIT has been run
0 = BIT not been run
0
(sticky when reset using
HRESET request)
6.9 NVRAM Memory Space Page Register (0x635)
Bits 2 to 0 of this register make up bits 18 to 16 of the NVRAM address bus when the
NVRAM is accessed.
Bits
Read/Write Description
Default
7 to 4
Read only
Reserved
0x0
3
Read/Write User/ZHURe select:
0=User NVRAM device is enabled in the NVRAM address window
1=ZHURe NVRAM device is enabled in the NVRAM address window
0
2 to 0
Read/Write 64 KB page select
000
b