CHAPTER 13 A/D CONVERTER
Preliminary User’s Manual U17260EJ3V1UD
312
(4) Analog input channel specification register (ADS)
This register specifies the input channel of the analog voltage to be A/D converted.
ADS can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets this register to 00H.
Figure 13-8. 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 clear bits 3 to 7 to 0.
2 Set a channel to be used for A/D conversion in the input mode by using port mode register 2
(PM2).
3. Do not set a pin to be used as a digital I/O pin with ADPC with ADS.
4. 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 peripheral hardware clock is stopped. For details,
see CHAPTER 31 CAUTIONS FOR WAIT.
Содержание 78K/0 Series
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