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CHAPTER 4 PORT FUNCTIONS
User’s Manual U19780EJ2V0UD
119
Figure 4-28. Format of A/D Port Configuration Register (ADPC)
Address: FF2FH After reset: 10H R/W
Symbol
7 6 5 4 3 2 1 0
ADPC 0
0
0
ADPC4 ADPC3 ADPC2 ADPC1 ADPC0
Analog input (A)/digital I/O (D) switching
AD
PC4
AD
PC3
ADP
C2
ADP
C1
ADP
C0
ANI15
/AV
REFM
/P27
ANI11
/P83
ANI10
/AMP2+
/P82
ANI9
/
AMP2OUT
/P81
ANI8
/AMP2
−
/P80
ANI6
/P26
ANI5
/AMP1+
/P25
ANI4
/
AMP1OUT
/P24
ANI3
/AMP1
−
/P23
ANI2
/AMP0+
/P22
ANI1
/
AMP0OUT
/P21
ANI0
/AMP0
−
/P20
0
0
0
0
0
A A A A A A A A A A A A
0
0
0
0
1
A A A A A A A A A A A D
0
0
0
1
0
A A A A A A A A A A D D
0
0
0
1
1
A A A A A A A A A D D D
0
0
1
0
0
A A A A A A A A D D D D
0
0
1
0
1
A A A A A A A D D D D D
0
0
1
1
0
A A A A A A D D D D D D
0 0 1 1 1
Setting
prohibited
0
1
0
0
0
A A A A A D D D D D D D
0
1
0
0
1
A A A A D D D D D D D D
0
1
0
1
0
A A A D D D D D D D D D
0
1
0
1
1
A A D D D D D D D D D D
0
1
1
1
1
A D D D D D D D D D D D
1
0
0
0
0
D D D D D D D D D D D D
Other than above
Setting prohibited
Note
In case of 78K0/KB2-A, setting prohibited
Cautions 1. Set the channel used for A/D conversion to the input mode by using port mode register 2 and
8 (PM2 and PM8).
2. Do not set the pin that is set by the A/D port configuration register (ADPC) by the analog
input channel specification register (ADS).
4.4 Port Function Operations
Port operations differ depending on whether the input or output mode is set, as shown below.
4.4.1 Writing to I/O port
(1) Output
mode
A value is written to the output latch by a transfer instruction, and the output latch contents are output from the pin.
Once data is written to the output latch, it is retained until data is written to the output latch again.
The data of the output latch is cleared when a reset signal is generated.
Note
−
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Note
−
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