UPD78P324 Datasheet, PDF (15/80 Pages) NEC – 16-/8-Bit Single-Chip Microcomputers

Type 1
IN
Type 2
IN
µPD78P324, 78P324(A)
Figure 1-1. I/O Circuits of Pins
VDD
P-ch
N-ch
Type 5
data
output
disable
input
disable
Type 8
data
output
disable
VDD
P-ch
N-ch
IN/OUT
VDD
P-ch
N-ch
IN/OUT
This is a Schmitt-triggered input which has the hysteresis
characteristic.
Type 3
VDD
P-ch
OUT
Type 9
IN
N-ch
Type 4
VDD
data
P-ch
OUT
output
disable
N-ch
This is the push-pull input which is capable of output high-
impedance (off for both P-ch and N-ch).
P-ch
N-ch
Comparator
Vref
(Threshold voltage)
input
enable
15