UPD6125A Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD6125A

4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION

NEC => Renesas Technology 

µPD6125A, 6126A

11.5 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 11-3. KI Pin Organization

P12

P2

KI3

KI2

KI1

KI0

Mask option

11.6 KI Pull-Down Resistor Organization

Pin

KI pull-down

resistor switch

(Mask option)

Pull-down

resistor

V SS

V DD

P-ch

N-ch

V SS

Input signal

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.

11

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