CHAPTER 10 A/D CONVERTER
Preliminary User’s Manual U16898EJ1V0UD
159
Table 10-3. Settings of ADCS and ADCE
ADCS ADCE
A/D
Conversion Operation
0
0
Stop status (DC power consumption path does not exist)
0
1
Conversion waiting mode (only reference voltage generator consumes power)
1
0
Conversion mode (reference voltage generator operation stopped
Note
)
1
1
Conversion mode (reference voltage generator operates)
Note Data of first conversion cannot be used.
Figure 10-5. Timing Chart When Boost Reference Voltage Generator Is Used
ADCE
Boost reference voltage
ADCS
Conversion
operation
Conversion
operation
Conversion stopped
Conversion
waiting
Boost reference voltage generator: operating
Note
Note The time from the rising of the ADCE bit to the rising of the ADCS bit must be 1
µ
s or longer to stabilize the
reference voltage.
Caution A/D conversion must be stopped before rewriting bits FR0 to FR2.
Remark f
XP
: Oscillation frequency of clock to peripheral hardware
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