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R01UH0336EJ0102 Rev.1.02
Page 1283 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 23 A/D Converter
Operation When Start Trigger is Input Before Completion of Conversion
A/D converter can hold a start trigger before completion of conversion.
Therefore, if more than one following start triggers (ignored after second input)
are input before completion of CGi A/D conversion, A/D conversion is
performed continuously.
Figure 23-6
Operation When Start Trigger is Input Before Completion of Conversion
Caution
Low priority start triggers before completion of conversion are ignored during
performing of a high priority CG conversion. Low priority start trigger before
completion of conversion is held before start of high priority CG conversion. If
any start trigger is not input, low priority start trigger is accepted during
performing of a high priority CG conversion.
Figure 23-7
Operation When Start Trigger is Input Before Completion of Conversion
(Input High Priority Start Trigger)
CG0 = CH3
Scan list conversion is performed one time in one-shot conversion mode
Conversion state
CG0 conversion
(by first start trigger CG0)
CG0 conversion (by
second start trigger CG0)
CG0 conversion (by
fourth start trigger CG0)
Conversion
First start
trigger
CG0
CH3
CH3
Second
start trigger
CG0
(Pending)
Third
start trigger
CG0
(Ignored)
Fourth
start trigger
CG0
(Pending)
Idle
Idle
Sampling
Conversion
Sampling
Conversion
Sampling
CH3
Set 0 to ADCAnCTL1.ADCAnTRM0
CG0 = CH3 (Scan list conversion is performed one time in one-shot conversion mode)
CG2 = CH9 (Scan list conversion is performed one time)
Conversion state
CG0 convert
CG2 convert
CG0 convert
Conversion
Start Trigger
CG0
CH3
Start Trigger
CG0
(Pending)
Idle
Idle
Sam-
pling
Sam-
pling
Sam-
pling
Conversion
Conversion
CH3
Sam-
pling
Conversion
CH9
CH3
Start Trigger
CG2
Start Trigger
CG0
(Ignored)