CHAPTER 4 PORT FUNCTIONS
User’s Manual U16896EJ2V0UD
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4.3.6 Port 9
Port 9 is a 9-bit I/O port for which I/O settings can be controlled in 1-bit units.
Port 9 includes the following alternate functions.
Table 4-9. Alternate-Function Pins of Port 9
Pin No.
Pin Name
Alternate Function
I/O
PULL
Note
Remark Block
Type
36 P90
TXD1/KR6
I/O
Ex0-SUT
37 P91
RXD1/KR7
Input
Ex1-SUHT
38 P96
TI51/TO51
I/O
Ex0-SUT
39 P97
SI01
Input
–
Ex1-SUL
40 P98
SO01
Output
Ex0-UF
41 P99
SCK01
I/O
N-ch open-drain output can
be specified.
Ex2-SUFL
42 P913
INTP4
Input
Ex1-SUIL
43 P914
INTP5
Input
Ex1-SUIL
44 P915
INTP6
Input
Yes
Analog noise elimination
Ex1-SUIL
Note
Software pull-up function
Caution P97, P99, and P913 to P915 have hysteresis characteristics when the alternate function is input,
but not in the port mode.