參數(shù)資料
型號： μPD78F9177Y
廠商： NEC Corp.
英文描述： 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述： 8位單片機(jī)微控制器（8位單片微控制器）
文件頁數(shù)： 33/150頁
文件大?。?/td> 653K
代理商： ΜPD78F9177Y
Preliminary Product Information
31
μ
PD78F9177Y
Figure 6-4. Format of Pull-Up Resistor Option Register 0
PU0m
Pm on-chip pull-up resistor selection
(m = 0 or 1)
On-chip pull-up resistor not used
On-chip pull-up resistor used
0
1
0
0
0
0
0
0
PU01
PU00
PU0
Symbol
Address
When reset
R/W
FFF7H
00H
R/W
6
7
5
4
3
2
Note
1
0
Note
For each port, PU0 selects whether on-chip pull-up resistors are to be used.
Caution
Bits 2 to 7 must be fixed to 0.
Figure 6-5. Format of Pull-Up Resistor Option Register B2
PUB2m
P2m on-chip pull-up resistor selection
(m = 0 to 2, 5, or 6)
On-chip pull-up resistor not used
On-chip pull-up resistor used
0
1
0
PUB26
PUB25
0
0
PUB22
PUB21
PUB20
PUB2
Symbol
Address
When reset
R/W
FF32H
00H
R/W
7
4
3
Note
6
5
2
1
0
Note
PUB2 selects whether on-chip pull-up resistors are to be used in 1-bit units.
Caution
Bits 3, 4, and 7 must be fixed to 0.
Figure 6-6. Format of Pull-Up Resistor Option Register B3
PUB3m
P3m on-chip pull-up resistor selection
(m = 0 to 3)
On-chip pull-up resistor not used
On-chip pull-up resistor used
0
1
0
0
0
0
PUB33
PUB32
PUB31
PUB30
PUB3
Symbol
Address
When reset
R/W
FF33H
00H
R/W
6
7
5
4
Note
3
2
1
0
Note
PUB3 selects whether on-chip pull-up resistors are to be used in 1-bit units.
Caution
Bits 4 to 7 must be fixed to 0.
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