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CHAPTER 4 PORT FUNCTIONS
User’s Manual U15104EJ2V0UD
Table 4-3. Port Mode Register and Output Latch Settings When Using Alternate Functions
Pin Name
Alternate Functions
PM
××
P
××
Name
I/O
P00 to P04
INTP0 to INTP4
Input
1
×
P33
TI50
Input
1
×
P34
TI51
Input
1
×
P36
BEEP0
Output
0
0
P37
BUZ
Output
0
0
P70
SI30
Input
1
×
P71
SO30
Output
0
0
P72
SCK30
Input
1
×
Output
0
0
P74
SI31
Input
1
×
P75
SO31
Output
0
0
P76
SCK31
Input
1
×
Output
0
0
P77
TI52
Input
1
×
P120
SI32
Input
1
×
P121
SO32
Output
0
0
P122
SCK32
Input
1
×
Output
0
0
P123
SI321
Input
1
×
P124
SO321
Output
0
0
P125
SCK321
Input
1
×
Output
0
0
P130 to P132
TO50 to TO52
Output
—
0
Caution When using the above alternate function pins as an output port, be sure to set the output
latch (P
××
) to 0.
Remark
×
:
Don’t care
PM
××
: Port mode register
P
××
:
Output latch of port