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.
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