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3 pin i/o circuits – NEC PD754144 User Manual

Page 30

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CHAPTER 2 PIN FUNCTIONS

30

User’s Manual U10676EJ3V0UM

2.3 Pin I/O Circuits

The following diagrams show the I/O circuits of the pins of the

µPD754244. Note that in these diagrams the I/

O circuits have been slightly simplified.

Type A

Type B

Type D

Type E-B

Type B-A

Type F-A

V

DD

IN

P-ch

N-ch

Data

Output

disable

N-ch

P-ch

IN

OUT

V

DD

P-ch

Output

disable

Data

P.U.R.

enable

Type D

Type A

IN/OUT

V

DD

P.U.R (Mask Option)

IN

V

DD

P.U.R.

P.U.R.

enable

P-ch

IN/OUT

Type D

Type B

Output

disable

Data

P.U.R. : Pull-Up Resistor

P.U.R. : Pull-Up Resistor

P.U.R. : Pull-Up Resistor

Schmitt-triggered input with hysteresis characteristics.

CMOS specification input buffer.

Push-pull output that can be placed in output
high-impedance (both P-ch, N-ch off).

P.U.R.

V

DD

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