![](http://datasheet.mmic.net.cn/330000/MB89951_datasheet_16437247/MB89951_15.png)
MB89950 Series
15
7. Setting OTPROM Options
The programming procedure is the same as that for the PROM. Options can be set by programming values 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
Note: Each bit is set to ‘1’ as the initialized value, therefore the pull-up option is not selected.
Address
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
3FF0
H
Vacancy
Readable
and writable
Vacancy
Readable
and writable
P46
Pull-up
1: Yes
0: No
Vacancy
Vacancy
Readable
and writable
P45
Pull-up
1: Yes
0: No
Vacancy
Oscillation
stabilization
time
1: 2
18
/f
C
0: 2
14
/f
C
P44
Pull-up
1: Yes
0: No
Vacancy
Reset pin
ouput
1: Yes
0: No
P43
Pull-up
1: Yes
0: No
Vacancy
Power-on
reset
1: Yes
0: No
P42
Pull-up
1: Yes
0: No
Vacancy
Vacancy
Readable
and writable
P41
Pull-up
1: Yes
0: No
Vacancy
Vacancy
Readable
and writable
P40
Pull-up
1: Yes
0: No
Vacancy
3FF1
H
Vacancy
Readable
and writable
Vacancy
3FF2
H
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
3FF3
H
Readable
and Writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
3FF4
H
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
3FF5
H
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
Readable
and writable
Vacancy
3FF6
H
Readable
and writable
Readable
and writable
Readable
and writable
Readable
and writable
Readable
and writable
Readable
and writable
Readable
and writable
Readable
and writable