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UPD6600AGS Datasheet(PDF) 10 Page - NEC

Part # UPD6600AGS
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

UPD6600AGS Datasheet(HTML) 10 Page - NEC

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µPD6124A, 6600A
10
11.3
KI PIN (P12)
This is the 4-bit pin for key input. All of these pins can be pulled down to the VSS level by mask option.
Figure 11-2. KI Pin Organization
P12
KI3
KI2
KI1
KI0
P2
Mask option
11.4
KI PULL-DOWN RESISTOR CONFIGURATION
V DD
V SS
N-ch
V SS
Pin
Input signal
K pull-down
resistor switch
(Mask option)
Pull-down
resistor
I
P-ch
When the pull-down resistor switch is turned on (set 1) by the mask option, pull-down resistor R is turned on.
Caution
When using the pin as the key switch, turn on the pull-down resistor switch by the mask option.



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