NEC PD78F9488 User Manual
Page 46
CHAPTER 2 PIN FUNCTIONS
User’s Manual U15331EJ4V1UD
46
Table 2-1. Types of Pin I/O Circuits (2/2)
Pin Name
I/O Circuit Type
I/O
Recommended Connection of Unused Pins
XT1
Input
Connect to V
SS
.
XT2
–
– Leave
open.
RESET 2
Input
–
IC0
Connect directly to V
SS
.
V
PP
– –
Independently connect a 10 k
Ω pull-down resistor, or connect
directly to V
SS
.
Figure 2-1. I/O Circuit Types (1/2)
Type 2
Type 2-H
Schmitt-triggered input with hysteresis characteristics.
IN
Input
enable
IN
Type 5-A
Type 5-K
Pull-up
enable
V
DD
P-ch
P-ch
IN/OUT
Data
Output
disable
Input
enable
V
DD
N-ch
V
SS
Data
Output
disable
Input
enable
V
DD
P-ch
IN/OUT
N-ch
Type 8-A
Type 9-C
Pull-up
enable
V
DD
P-ch
Data
V
DD
P-ch
Output
disable
IN/OUT
N-ch
V
SS
IN
Comparator
V
REF
(Threshold voltage)
AV
SS
P-ch
N-ch
Input
enable
+