HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 857
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Typical operations when three channels in A/D0 (AN0 to AN2) are selected in multi mode are
described next. Figure 21.3 shows a timing diagram for this example.
1. Multi mode is selected (MULTI = 1), channel group A/D0 is selected, analog input channels
2. When A/D conversion of the first channel (AN0) is completed, the result is transferred into
3. Next, conversion of the second channel (AN1) starts automatically.
4. Conversion proceeds in the same way through the third channel (AN2).
5. When conversion of all selected channels (AN0 to AN2) is completed, the ADF flag is set to 1
Channel 0 (AN0)
Channel 1 (AN1)
Channel 2 (AN2)
Channel 3 (AN3)
AN0 to AN2 are selected (CH1 = 1, CH0 = 0), and A/D conversion is started (ADST = 1).
ADDRA0.
and ADST bit is cleared to 0. If the ADIE bit is set to 1, an ADI0 interrupt is requested at this
time.
operating
operating
operating
operating
ADDRA
ADDRB
ADDRC
ADDRD
Note: * Vertical arrows ( ) indicate instruction execution by software.
ADST
ADF
Figure 21.3 Example of A/D Converter Operation
Waiting
Waiting
Waiting
Waiting
(Multi Mode, Channels AN0 to AN2 Selected)
A/D conversion 1
Set*
A/D conversion 2
A/D conversion
Transfer
A/D conversion 3
A/D conversion result 1
Waiting
Waiting
Rev. 4.00 Sep. 14, 2005 Page 807 of 982
Clear
A/D conversion result 2
A/D conversion result 3
Section 21 A/D Converter
Waiting
REJ09B0023-0400
Clear*
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