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 VSS.
XT2
–
– Leave open.
RESET 2 Input –
IC0 Connect directly to VSS.
VPP
– –
Independently connect a 10 kΩ pull-down resistor, or connect
directly to VSS.
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
VDD
P-ch
P-ch
IN/OUT
Data
Output
disable
Input
enable
VDD
N-ch
VSS
Data
Output
disable
Input
enable
VDD
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
+