M16C28 Datasheet, PDF (258/423 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/28 Group (M16C/28, M16C/28B)
15. A/D Converter
•Example when selecting AN0 to AN3 to A/D sweep pins (SCAN1 to SCAN0="012")
•Example 1: When Timer B1 underflow is generated during AN0 pin conversion
Timer B0 underflow
Timer B1 underflow
AN0
AN1
AN2
AN3
ADST flag
"1"
"0"
ADERR0 flag ^"1"
"0"
ADERR1 flag
"1"
"0"
ADTCSF flag
"1"
"0"
ADSTT0 flag
"1"
"0"
ADSTT1 flag
"1"
"0"
ADSTRT0 flag ^"1"
"0"
ADSTRT1 flag "1"
"0"
IR bit in the ADIC "1"
register
"0"
Do not set to "1" by program
Set to “0" by program
Set to "0" by an interrupt request acknowledgement or a program
A/D pin input
voltage sampling
A/D pin conversion
•Example 2: When Timer B1 underflow is generated after AN0 pin conversion
Timer B0 underflow
AN0
AN1
AN2
AN3
Timer B1 underflow
ADST flag
"1"
"0"
ADERR0 flag ^"1"
"0"
ADERR1 flag
"1"
"0"
ADTCSF flag
"1"
"0"
ADSTT0 flag
"1"
"0"
ADSTT1 flag
"1"
"0"
ADSTRT0 flag "1"
"0"
ADSTRT1 flag "1"
"0"
IR bit in the ADIC "1"
register
"0"
Do not set to "1" by program
Set to "0" by program
Set to "0" by an interrupt request acknowledgement or a program
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
Figure 15.20 Each Flag Operation in ADSTAT0 Register Associated with the Operation
Example in Delayed Trigger Mode 0 (1)
Rev. 2.00 Jan. 31, 2007 ^{page 238} of 385
REJ09B0047-0200