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CHAPTER 5 PORT FUNCTIONS
User’s Manual U15109EJ3V0UD
185
5.2.14 Port 15
Port 15 is an 8-bit I/O port for which I/O settings can be controlled in 1-bit units.
After reset:
00H
R/W
Address: FFFFF01EH
7
6
5
4
3
2
1
0
P15
P157
P156
P155
P154
P153
P152
P151
P150
P15n
Control of output data (in output mode) (n = 0 to 7)
0
Outputs 0
1
Outputs 1
Remark
In input mode:
When P15 is read, the pin levels at that time are read. Writing to P15 writes the
values to that port. This does not affect the input pins.
In output mode: When P15 is read, the values of P15 are read. Writing to P15 writes the values to
that port, and those values are immediately output.
Port 15 includes the following alternate functions.
Table 5-14. Port 15 Alternate Function Pins
Pin Name
Alternate Function
I/O
PULL
Note
Remark
P150
RXD3
P151
TXD3
P152
ASCK3
P153
TI110
P154
TI111
P155
TO12
P156
TI120
Port 15
P157
TI121
I/O
No
−
Note
Software pull-up function