NEC 78K0 User Manual page 224

(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 11-4. Format of Analog Input Channel Specification Register (ADS)
Address: FF29H
Symbol
ADS
Cautions 1. Be sure to clear 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.
CHAPTER 30 CAUTIONS FOR WAIT.
224
CHAPTER 11 A/D CONVERTER
After reset: 00H R/W
7 6 5
0 0 0
ADS2 ADS1 ADS0
0 0 0 ANI0
0 0 1 ANI1
0 1 0 ANI2
0 1 1 ANI3
1 0 0 ANI4
1 0 1 ANI5
1 1 0 ANI6
1 1 1 ANI7
User's Manual U16227EJ2V0UD
4 3 2 1
0 0 ADS2 ADS1
Analog input channel specification
0
ADS0
For details, see