![](http://datasheet.mmic.net.cn/30000/MB89P147-V1PF_datasheet_2367323/MB89P147-V1PF_18.png)
MB89140 Series
18
DS07-12522-4E
4. Setting PROM 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
Notes: Initial value is 1 for each bit.
Do not write 0 to the vacant bit.
The read value of the vacant bit is 1, unless 0 is written to it.
The parenthesized addresses are the corresponding addresses on the EPROM programmer.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
8000H
(0000H)
Vacancy
Readable and
writable
Vacancy
Readable and
writable
Vacancy
Readable and
writable
Single/dual-
clock system
1: Dual clock
0: Single clock
Reset pin
output
1: Yes
0: No
Power-on
reset
1: Yes
0: No
Reserved
(Write 1 bit
to this bit.)
Reserved
(Write 1 bit
to this bit.)
8001H
(0001H)
P17
Pull-up
1: No
0: Yes
P16
Pull-up
1: No
0: Yes
P15
Pull-up
1: No
0: Yes
P14
Pull-up
1: No
0: Yes
Vacancy
Readable and
writable
Vacancy
Readable and
writable
Vacancy
Readable and
writable
Vacancy
Readable and
writable
8002H
(0002H)
P37
Pull-up
1: No
0: Yes
P36
Pull-up
1: No
0: Yes
P35
Pull-up
1: No
0: Yes
P34
Pull-up
1: No
0: Yes
P33
Pull-up
1: No
0: Yes
P32
Pull-up
1: No
0: Yes
Vacancy
Readable and
writable
Vacancy
Readable and
writable
8003H
(0003H)
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
Readable and
writable
8004H
(0004H)
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
Readable and
writable
8005H
(0005H)
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
Readable and
writable
8006H
(0006H)
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
Readable and
writable