M16C28 Datasheet, PDF (264/423 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 ADTRG pin falling edge is generated during AN0 pin conversion
ADTRG pin input
AN0
AN1
AN2
AN3
A/D pin input
voltage sampling
A/D pin conversion
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 interrupt request acknow edgement or a program
•Example 2: When ADTRG pin falling edge is generated again after AN0 pin conversion
ADTRG pin input
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 interrupt request acknow edgment 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 15.25 Each Flag Operation in ADSTAT0 Register Associated with the Operation Example
in Delayed Trigger Mode 1 (1)
Rev. 2.00 Jan. 31, 2007 ^{page 244} of 385
REJ09B0047-0200