Vdd; Pin I/O Circuits - NEC PD754144 User Manual

2.3 Pin I/O Circuits

The following diagrams show the I/O circuits of the pins of the µ PD754244. Note that in these diagrams the I/
O circuits have been slightly simplified.
Type A
IN
CMOS specification input buffer.
Type B
IN
Schmitt-triggered input with hysteresis characteristics.
Type B-A
V
DD
P.U.R (Mask Option)
IN
P.U.R. : Pull-Up Resistor
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CHAPTER 2 PIN FUNCTIONS
V
DD
P-ch
N-ch
User's Manual U10676EJ3V0UM
Type D
Data
Output
disable
Push-pull output that can be placed in output
high-impedance (both P-ch, N-ch off).
Type E-B
P.U.R.
enable
Data
Type D
Output
disable
Type A
P.U.R. : Pull-Up Resistor
Type F-A
P.U.R.
enable
Data
Type D
Output
disable
Type B
P.U.R. : Pull-Up Resistor
V
DD
P-ch
OUT
N-ch
V
DD
P.U.R.
P-ch
IN/OUT
V
DD
P.U.R.
P-ch
IN/OUT