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Appendix A: Memory and Register Mapping
AM700 Audio Measurement Set Service Manual
A-7
Table A-13: Board status register address: 12000000 Operation: read only (cont.)
Bit DescriptionName
6 PD2 DRAM Present bit 2
7 TOEN 1 = 30 mS timer enabled
0 = 30 mS timer disabled
8 Reserved
9 Reserved
10 Reserved
11 Reserved
12 NVBF 0 = NVRAM battery low
1 = NVRAM battery normal
13 PGOK 1 = +12 V ready
14 TIMEOUT Bus Time Out Status
15 FPDO FEPROM present bit 0
16 FPD1 FEPROM present bit 1
17 FPD2 FEPROM present bit 2
18 FPD3 FEPROM present bit 3
19 FPD4 FEPROM present bit 4
20 FPD5 FEPROM present bit 5
21 FPD6 FEPROM present bit 6
22 FPD7 FEPROM present bit 7
23 S_ID_BIT Silicon ID Serial Bit
24...31 Board Version Number
Table A-14: Board program register address: 13000000
Bit Name Description
0 NVEN 1 = NVRAM write protected
0 = NVRAM write enabled
1 FEPEN 1 = FEPROM write protected
0 = FEPROM write enabled
2 ODEV 1 = even parity
0 = odd parity
3 CLRPAR 1 = mask and clear error detection status bits
1 goes to 0 = unmask error detection status bits