UPD754144 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD754144

4-BIT SINGLE-CHIP MICROCONTROLLERS

NEC => Renesas Technology 

µPD754144, 754244

3.3 Pin Input/Output Circuits

The µPD754244 pin input/output circuits are shown schematically.

TYPE A

TYPE D

VDD

P-ch

IN

N-ch

data

output

disable

VDD

P-ch

OUT

N-ch

CMOS specification input buffer.

TYPE B

IN

Schmitt-trigger input having hysteresis characteristic.

Push-pull output that can be placed in output

high-impedance (both P-ch, N-ch off).

TYPE E-B

data

output

disable

P.U.R.

enable

Type D

VDD

P.U.R.

P-ch

IN/OUT

Type A

TYPE B-A

VDD

P.U.R. (Mask Option)

IN

P.U.R. : Pull-Up Resistor

P.U.R. : Pull-Up Resistor

TYPE F-A

data

output

disable

P.U.R.

enable

Type D

VDD

P.U.R.

P-ch

IN/OUT

Type B

P.U.R. : Pull-Up Resistor

11

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