FUJITSU Semiconductor Controller MB89950/950A - Manual (Page 306)

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APPENDIX
■ Bit map for PROM option
Table D.1-2 "Bit map for PROM option" shows the bit map for PROM option.
Table D.1-2 Bit map for PROM option
7 6 5 4 3 2 1 0
3FF0
H
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Oscillation
stabilization
time
1: 2
18
/F
CH
0: 2
14
/F
CH
Reset pin
Output
1: Available
0: Unavailable
Power-on
Reset
1: Available
0: Unavailable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
3FF1
H
Vacant
Readable/
Writable
P46
Pull-up
1: Unavailable
0: Available
P45
Pull-up
1: Unavailable
0: Available
P44
Pull-up
1: Unavailable
0: Available
P43
Pull-up
1: Unavailable
0: Available
P42
Pull-up
1: Unavailable
0: Available
P41
Pull-up
1: Unavailable
0: Available
P40
Pull-up
1: Unavailable
0: Available
3FF2
H
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
3FF3
H
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
3FF4
H
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
3FF5
H
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
3FF6
H
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
Vacant
Readable/
Writable
F
CH
: main clock oscillation frequency
Note:
Initial value is 1 at each bit