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UPD61P24CS Datasheet(PDF) 10 Page - NEC

Part # UPD61P24CS
Description  4-BIT SINGLE-CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION
PDF  36 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD61P24CS Datasheet(HTML) 10 Page - NEC

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µPD61P24
10
11.3
KI Pin (P12)
This is the 4-bit pin for key input. All of these pins are pulled down to the VSS level by PLA data.
Figure 11-2. KI Pin Organization
KI3
KI2
KI1
KI0
P2
11.4
KI Pull-Down Resistor Configuration
V DD
V SS
N-ch
V SS
Pin
Input signal
PLA KI pull-down
resistor switch
Pull-down
resistor
P-ch
When the pull-down resistor switch is turned on (set 1) by PLA data, pull-down resistor R is turned on.



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