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14.2.8 Port 9
Port 9 is a 7-bit I/O port for which I/O settings can be controlled in 1-bit units.
00H
After reset:
7
P9
0
P9n
0
1
Remark
In input mode:
In output mode: When the P9 register is read, the P9 register's values are read. Writing to P9 writes
Port 9 includes the following alternate functions.
Pin Name
Port 9
P90
P91
P92
P93
P94
P95
P96
Note Software pull-up function
CHAPTER 14
Figure 14-33. Port 9 (P9)
R/W
Address: FFFFF012H
6
5
P96
P95
Control of output data (in output mode) (n = 0 to 6)
Outputs 0
Outputs 1
When the P9 register is read, the pin levels at that time are read. Writing to P9 writes
the values to that register. This does not affect the input pins.
the values to that register, and those values are immediately output.
Table 14-9. Port 9 Alternate Function Pins
Alternate Function
LBEN/WRL
UBEN
R/W/WRH
DSTB/RD
ASTB
HLDAK
HLDRQ
User's Manual U13850EJ4V0UM
PORT FUNCTION
4
3
P94
P93
P92
Note
I/O
PULL
I/O
No
2
1
0
P91
P90
Remark
−
401
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