CHAPTER 2 PIN FUNCTIONS
Preliminary User’s Manual U17260EJ3V1UD
44
Table 2-2. Pin I/O Circuit Types (2/2)
Pin Name
I/O Circuit Type
I/O
Recommended Connection of Unused Pins
P121/X1
Note 1
P122/X2/EXCLK
Note 1
P123/XT1
Note 1
P124/XT2/EXCLKS
Note 1
37 I/O
Input:
Independently connect to EV
DD
or EV
SS
via a resistor.
Output: Leave
open.
P130 3-C
Output
Leave
open.
P140/PCL/INTP6
P141/BUZ/INTP7
5-AH I/O
Input:
Independently connect to EV
DD
or EV
SS
via a resistor.
Output: Leave
open.
RESET 2
Input
−
FLMD0
38
Input
Connect to EV
SS
or V
SS
.
AV
REF
Connect directly to EV
DD
or V
DD
Note 2
.
AV
SS
−
−
Connect directly to EV
SS
or V
SS
.
Notes 1.
Use recommended connection above in I/O port mode (see
Figure 6-2 Format of Clock Operation
Mode Select Register (OSCCTL)
) when these pins are not used.
2.
Make the same potential as the V
DD
pin when port 2 is used as a digital port.