MB89160/160A Series
8. Setting OTPROM Options
The programming procedure is the same as that for the PROM. Options can be set by programming value at
the addresses shown on the memory map. The relationship between bits and options is shown on the following
bit map:
• OTPROM option bit map
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Vacancy
Vacancy
Vacancy
Reset pin
output
1: Yes
Clock mode Power-on
selection reset
1: Dual clock 1: Yes
Oscillation stabilization time
3FF0H
WTM1
WTM0
Readable Readable
Readable
0: No
0: Single
clock
0: No
See section “■ Mask Option.”
P07
P06
P05
P04
P03
P02
P01
P00
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
3FF1H
3FF2H
3FF3H
3FF4H
3FF5H
P17
P16
P15
P14
P13
P12
P11
P10
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
P57
P56
P55
P54
P53
P52
P51
P50
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Pull-up
1: No
0: Yes
Vacancy
Vacancy
Vacancy
Vacancy
Vacancy
Vacancy
Vacancy
Vacancy
Readable Readable
Vacancy Vacancy
Readable
Vacancy
Readable
Vacancy
Readable
Vacancy
Readable
Vacancy
Readable
Vacancy
Readable
Vacancy
Readable Readable
Readable
Readable
Readable
Readable
Readable
Readable
Notes: • Set each bit to 1 to erase.
• Do not write 0 to the vacant bit.
The read value of the vacant bit is 1, unless 0 is written to it.
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