CHAPTER 12 A/D CONVERTER
Preliminary User’s Manual U16315EJ1V0UD
230
(2) Analog input channel specification register (ADS)
This register specifies the input port of the analog voltage to be A/D converted.
ADS can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
Figure 12-6. Format of Analog Input Channel Specification Register (ADS)
ADS0
ADS1
ADS2
0
0
0
0
0
Analog input channel specification
ANI0
ANI1
ANI2
ANI3
ANI4
ANI5
ANI6
ANI7
ADS0
0
1
0
1
0
1
0
1
ADS1
0
0
1
1
0
0
1
1
ADS2
0
0
0
0
1
1
1
1
0
1
2
3
4
5
6
7
ADS
Address: FF29H After reset: 00H R/W
Symbol
Cautions 1. Be sure to set bits 3 to 7 of ADS to 0.
2. If data is written to ADS, a wait cycle is generated. Do not write data to ADS when the CPU
is operating on the subsystem clock and the X1 input clock is stopped. For details, refer to
CHAPTER 29 CAUTIONS FOR WAIT.