UPD784020 Datasheet, PDF (17/90 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCOMPUTER

mPD784020, 784021
Fig. 6-1 I/O Circuits for Pins
Type 1
VDD
P
IN
N
Type 2
IN
Schmitt trigger input with hysteresis characteristics
Type 4
VDD
Data
Output
disable
P
OUT
N
Push-pull output which can output high impedance
(both the positive and negative channels are off.)
Type 8-A
VDD
Type 2-A
VDD
P
IN
Pull-up
enable
Schmitt trigger input with hysteresis characteristics
Type 5-A
VDD
Pull-up
enable
Data
Output
disable
P
VDD
P
IN/OUT
N
Input
enable
Type 12
Pull-up
enable
Data
Output
disable
VDD
P
N
P
IN/OUT
P
Analog output
voltage
N
OUT
Type 10-A
Pull-up
enable
Data
Open
drain
Output
disable
Type 20
VDD
VDD
Data
P
VDD
P
N
P
IN/OUT
Output
N
disable
Comparator
+
P
–
N
VREF
(Threshold voltage)
Input
enable
IN/OUT
17