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UPD784021 Datasheet(PDF) 17 Page - NEC

Part # UPD784021
Description  16/8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  90 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD784021 Datasheet(HTML) 17 Page - NEC

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



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