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Meaning of the bits
1
SRAM control register (write only, address 066h, address register selection 1)
Bit
7
0
0
0
0
1
1
1
1
It is possible that selection is limited by default in the BIOS Setup.
1
This setting is only practical when memory is activated.
2
17.4.4
General Purpose Ports (GPP) output register (read/write, address 404Dh)
Meaning of the bits
General Purpose Ports output register (read/write, address 404Dh)
Bits
7
1
0
NOTICE
Data loss
If SIMATIC products are installed on your device, the ASPC2 may not be reset by a user
program under any circumstances.
SIMATIC HMI IPC577C
Operating Instructions, 10/2010, A5E02368074-02
6
5
4
3
2
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
0
6
5
4
3
1
0
1
1
1
Length in KB
0
Disabled
4
8
16
32
64
128
2
Disabled
0
Reserved (write 0 0 0 0 0 0)
Meaning
2
1
0
1
Write protection for BIOS Flash Memory is
active (default)
0
Write protection for BIOS Flash Memory is
inactive
SW reset for PROFIBUS ASIC ASPC2 is
inactive (default)
SW reset for PROFIBUS ASIC ASPC2 is
active
Watchdog locking is active (default)
Watchdog locking is inactive
Reserved (read/write)
Detailed descriptions
17.4 I/O Address Areas
175
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