Pin Input/Output Circuits And Recommended Connection Of Unused Pins - NEC mPD789101 User Manual

3.3 Pin Input/Output Circuits and Recommended Connection of Unused Pins

The input/output circuit type for each pin and the recommended connection of pins are shown in Table 3-1.
For the input/output circuit configuration of each type, refer to Figure 3-1.
Table 3-1. Types of Pin Input/Output Circuits and Recommended Connection of Unused Pins
Pin Name Input/Output Circuit Type
P00 to P03
P10, P11
P20/SCK20/ASCK20
P21/SO20/TxD20
P22/SI20/RxD20
P23/INTP0/CPT20/SS20
P24/INTP1/TO80/TO20
P25/INTP2/TI80
P50 to P53
(Mask ROM version)
P50 to P53
( µ PD78F9116, 78F9136)
P60/ANI0 to P63/ANI3
AV
DD
AV
SS
RESET
IC0
44
CHAPTER 3 PIN FUNCTIONS
Input/Output
5-A Input/output
8-A
13-W
13-V
9-C Input
— —
2 Input
— —
User's Manual U13045EJ2V0UM00
Recommended Connection of Unused Pins
Input: Independently connect these pins to V
V via a resistor.
SS
Output: Leave open
Input: Independently connect these pins to V
resistor.
Output: Leave open
Connect to V or V .
DD SS
Connect to V .
DD
Connect to V .
SS
—
Connect directly to V .
SS
or
DD
via a
DD