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CHAPTER 4 PORT FUNCTIONS
User’s Manual U16896EJ2V0UD
80
4.3.2 Port 3
Port 3 is an 8-bit I/O port for which I/O settings can be controlled in 1-bit units.
Port 3 includes the following alternate functions.
Table 4-5. Alternate-Function Pins of Port 3
Pin No.
Pin Name
Alternate Function
I/O
PULL
Note 1
Remark Block
Type
22 P30
TXD0
Output
D-U
23 P31
RXD0/INTP7
Input
D1-SUIHL
24 P32
ASCK0/ADTRG/TO01
I/O
E10-SUL
25 P33
TIP00/TOP00
I/O
Gxx10-SUL
26 P34
TIP01/TOP01
I/O
Gxx10-SUL
27 P35
TI010/TO01
I/O
Yes –
E10-SUL
55 P38
SDA0
Note 2
I/O
D2-SNMUFH
56 P39
SCL0
Note 2
I/O
No
Note 3
N-ch
open-drain
output
D2-SNMUFH
Notes 1.
Software pull-up function
2.
Only in the
μ
PD703302Y, 70F3302Y
3.
An on-chip pull-up resistor can be provided by a mask option (only in the
μ
PD703302, 703302Y).
Caution P31 to P35, P38, and P39 have hysteresis characteristics when the alternate function is input, but
not in the port mode.