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UPD17P136ACT Datasheet(PDF) 128 Page - NEC

Part # UPD17P136ACT
Description  4-BIT SINGLE-CHIP MICROCONTROLLER
PDF  292 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17P136ACT Datasheet(HTML) 128 Page - NEC

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CHAPTER 12 PORTS
109
12.7.3 Specifying Pull-Up Resistor Incorporation Using Software
Pull-up resistor incorporation can be specified in 4-bit units using P0AGPU and P0BGPU (address 0CH) in the
register file.
Figure 12-3. Specifying Pull-Up Resistor Incorporation Using Software
Bit 3
Bit 2
Bit 1
Bit 0
P0BGPU
P0AGPU
R/W
0000
0
P0AGPU
Function
Does not contain pull-up
resistor in port 0A.
1
Read/write
Initial value when reset
0
P0BGPU
Function
1
RF: 0CH
Read = R, write = W
0
0
Does not contain pull-up
resistor in port 0B.
Contains pull-up resistor in
port 0A.
Contains pull-up resistor in
port 0B.



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