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M16C/29 Group
•Example 3: When Timer B0 underflow is generated during A/D pin conversion of any pins except AN
Timer B0 underflow
AN
0
AN
1
AN
2
AN
3
"1"
ADST flag
"0"
"1"
ADERR0 flag
"0"
"1"
ADERR1 flag
"0"
"1"
ADTCSF flag
"0"
"1"
ADSTT0 flag
"0"
"1"
ADSTT1 flag
"0"
"1"
ADSTRT0 flag
"0"
"1"
ADSTRT1 flag
"0"
"1"
IR bit in the ADIC
"0"
register
ADST flag: Bit 6 in the ADCON0 register
ADERR0, ADERR1, ADTCSF, ADSTT0, ADSTT1, ADSTRT0 and ADSTRT1 flag: bits 0, 1, 3, 4, 5, 6 and 7 in the ADSTAT0 register
•Example 4: After Timer B0 underflow is generated and when Timer B0 underflow is generated again
Timer B0 underflow
AN
0
AN
1
AN
2
AN
3
"1"
ADST flag
"0"
"1"
ADERR0 flag
"0"
ADERR1 flag
"1"
"0"
"1"
ADTCSF flag
"0"
"1"
ADSTT0 flag
"0"
ADSTT1 flag
"1"
"0"
ADSTRT0 flag
"1"
"0"
ADSTRT1 flag
"1"
"0"
IR bit in the ADIC
"1"
register
"0"
Figure 15.1.7.3 Each Flag Operation in ADSTAT0 Register Associated with the Operation
Example in Delayed Trigger Mode 0 (2)
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
Timer B0 underflow
Timer B1 underflow
Do not set to "1" by program
before Timer B1 underflow is genetaed
Timrt B0 underflow
(An interrupt does not affect A/D conversion)
Timer B1 underflow
Do not set to "1" by program
Set to "0" by interrupt request acknowledgement or a program
page 236 of 402
(Abort othrt pins conversion )
Timer B1 underflow
Set to "0" by interrupt request acknowledgement or a program
Set to "0" by program
15. A/D Converter
pin
0
A/D pin input
voltage sampling
A/D pin conversion
Set to "0" by program
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