UPD6124A 查看數據表（PDF） - NEC => Renesas Technology

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UPD6124A

4-BIT SINGLE-CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION

NEC => Renesas Technology 

µPD6124A, 6600A

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

P2

KI3

KI2

KI1

KI0

Mask option

11.4 KI PULL-DOWN RESISTOR CONFIGURATION

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.

10

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