UPD75P218 Datasheet, PDF (7/36 Pages) NEC – 4-BIT SINGLE-CHIP MICROCOMPUTER

TYPE A
IN
Fig. 1-1 Pin Input/Output Circuit
VDD
P-ch
TYPE F
Data
Output
disable
Type D
N-ch
Type B
µPD75P218
IN/OUT
CMOS input buffer
TYPE B
IN
I/O circuit consisting of push-pull output of Type D and
Schmitt trigger of Type B
TYPE G
P-ch output
disable
Data
VDD
P-ch
IN/OUT
N-ch
Schmitt trigger input with hysteresis
TYPE D
Data
Output
disable
VDD
P-ch
OUT
N-ch
Push-pull output which can be set to high-impedance
output (off for both P-ch and N-ch)
TYPE E
Data
Output
disable
Type D
IN/OUT
Type A
Type B
I/O circuit that can switch the push-pull output or
N-ch open drain output (off for P-ch)
TYPE I-D
VDD
VDD
Data
P-ch
P-ch
N-ch
OUT
TYPE I-E
VDD
Data
P-ch
N-ch
VDD
P-ch
OUT
Pull-down resistor
VLOAD
I/O circuit consisting of push-pull output of Type D and
input buffer of Type A
7