M16C65 Datasheet, PDF (697/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
27. A/D Converter
Table 27.7 lists Cycles of A/D Conversion Item. A/D conversion period is as follows.
Start processing time depends on which φAD is selected.
A/D conversion starts after the start processing time elapses by setting the ADST bit in the ADCON0
register to 1 (A/D conversion start). When reading the ADST bit before starting A/D conversion, 0 (A/D
conversion stop) is read.
When selecting multiple pins and in A/D conversion repeat mode, between-execution processing time is
inserted between A/D conversions.
In one-shot mode and single sweep mode, the ADST bit becomes 0 at the end processing time and the
last A/D conversion result is stored in the ADi register.
One-shot mode:
Start processing time + A/D conversion execution time + end processing time
Two pins are selected in single sweep mode:
Start processing time + (A/D conversion execution time + between-execution processing time + A/D
conversion execution time) + end processing time
Table 27.7 Cycles of A/D Conversion Item
A/D Conversion Item
Start processing time φAD = fAD
φAD = fAD divided by 2
φAD = fAD divided by 3
φAD = fAD divided by 4
φAD = fAD divided by 6
φAD = fAD divided by 12
A/D conversion
Open-circuit detection disabled
execution time
Open-circuit detection enabled
Between-execution processing time
End processing time
Cycle
1 to 2 cycles of fAD
2 to 3 cycles of fAD
3 to 4 cycles of fAD
3 to 4 cycles of fAD
4 to 5 cycles of fAD
7 to 8 cycles of fAD
40 cycles of φAD
42 cycles of φAD
1 cycle of φAD
2 to 3 cycles of fAD
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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