Section 19 A/D Converter (ADC)
Rev. 5.00 May 29, 2006 page 541 of 698
REJ09B0146-0500
Typical operations when three channels in group 0 (AN0 to AN2) are selected in scan mode are
described next. Figure 19.6 shows a timing diagram for this example.
1. Multi mode is selected (MULTI = 1, SCN = 0), channel group 0 is selected (CH2 = 0), analog
input channels AN0 to AN2 are selected (CH1 = 1, CH0 = 0), and A/D conversion is started
(ADST = 1).
2. When A/D conversion of the first channel (AN0) is completed, the result is transferred into
ADDRA. Next, conversion of the second channel (AN1) starts automatically.
3. Conversion proceeds in the same way through the third channel (AN2).
4. When conversion of all selected channels (AN0 to AN2) is completed, the ADF flag is set to 1
and ADST bit is cleared to 0. If the ADIE bit is set to 1, an ADI interrupt is requested at this
time.
When the ADST bit is cleared to 0, A/D conversion stops. After that, if the ADST bit is set to 1,
A/D conversion starts again from the first channel (AN0).
Channel 0 (AN0)
operating
ADST
ADF
Channel 1 (AN1)
operating
Channel 2 (AN2)
operating
Channel 3 (AN3)
operating
ADDRA
ADDRB
ADDRC
ADDRD
Waiting
Waiting
Waiting
Waiting
Set
*
Clear
*
Clear
*
A/D conversion result 2
Waiting
Waiting
A/D conversion result 3
A/D conversion 1
Waiting
A/D conversion result 1
Transfer
A/D conversion 3
A/D conversion
A/D conversion 2
Note:
*
Downward arrows (
↓
) indicate instruction executed by software.
Figure 19.6 Example of A/D Converter Operation (Multi Mode,
Channels AN0 to AN2 Selected)
Summary of Contents for SH7706 Series
Page 8: ...Rev 5 00 May 29 2006 page viii of xlviii ...
Page 160: ...Section 5 Cache Rev 5 00 May 29 2006 page 112 of 698 REJ09B0146 0500 ...
Page 370: ...Section 11 Watchdog Timer WDT Rev 5 00 May 29 2006 page 322 of 698 REJ09B0146 0500 ...
Page 554: ...Section 17 Pin Function Controller PFC Rev 5 00 May 29 2006 page 506 of 698 REJ09B0146 0500 ...
Page 576: ...Section 18 I O Ports Rev 5 00 May 29 2006 page 528 of 698 REJ09B0146 0500 ...
Page 746: ...Index Rev 5 00 May 29 2006 page 698 of 698 REJ09B0146 0500 ...
Page 749: ...SH7706 Group Hardware Manual ...