PD17012_15 Datasheet, PDF (147/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
13.2 Input Selector Block
Figure 13-2 shows the configuration of the input selector block.
The input selector block selects the pin to be used via the A/D converter channel select register.
Two or more pins cannot be used at the same time with the A/D converter.
Figure 13-3 shows the configuration and function of the A/D converter channel select register.
Figure 13-2. Configuration of Input Selector Block
P1B0/ADC0
P1B1/ADC1
ADCCH1 flag
ADCCH0 flag
Selector
Compare block
VADCIN
Each I/O port
Figure 13-3. Configuration of A/D Converter Channel Select Register
Name
A/D converter channel
select register
Flag symbol Address
b3 b2 b1 b0
0 0 A A 14H
DD
CC
CC
HH
10
Read/
write
R/W
Sets pin used for A/D converter
0 0 P1B0/ADC0 pin
0 1 P1B1/ADC1 pin
1 0 A/D converter is not used (general-purpose input port)
1 1 A/D converter is not used (general-purpose input port)
Fixed to 0
Power-on
Clock stop
CE
0011
11
11
Data Sheet U10101EJ4V0DS
145