HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 859
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417641.pdf
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21.3.4
With simultaneous sampling, conversion is conducted with sampling of the input voltages on two
channels (channel in A/D0 and channel in A/D1) at the same time. Simultaneous sampling is valid
in single mode and multi mode and scan mode. Channels for sampling are determined by the CH1
and CH0 bits of the ADCSR0 or ADCSR1.
Procedure for setting simultaneous sampling is shown the next. Select the ADCSR registers
(conversion mode and input channels and conversion time), and then starts simultaneous sampling
of two channels when the DSMP bit set to 1. When DSMP bit set to 1 during A/D conversion, not
to start A/D conversion again. When the ADST bit is set, A/D conversion stops. The timing
diagrams for simultaneous sampling are the same as for single mode and multi mode and scan
mode.
Channel 0 (AN0)
Channel 1 (AN1)
Channel 2 (AN2)
Channel 3 (AN3)
operating
operating
operating
operating
Notes: 1. Vertical arrows ( ) indicate instruction execution by software.
ADDRA0
ADDRB0
ADDRC0
ADDRD0
ADST
ADF
Simultaneous Sampling Operation
2. A/D conversion data is invalid/
Waiting
Waiting
Waiting
Waiting
Figure 21.4 Example of A/D Converter Operation
A/D conversion 1
(Scan Mode, Channels AN0 to AN2 Selected)
Set*
1
A/D conversion 2
Transfer
Waiting
Continuous A/D conversion
A/D conversion 3
A/D conversion result 1
A/D conversion 4
Waiting
Rev. 4.00 Sep. 14, 2005 Page 809 of 982
A/D conversion 5
A/D conversion result 2
A/D conversion result 3
Section 21 A/D Converter
A/D conversion result 4
REJ09B0023-0400
*
Clear*
2
1
Waiting
Waiting
Waiting
Clear*
1
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