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Section 21 A/D Converter
Rev. 4.00 Sep. 14, 2005 Page 809 of 982
REJ09B0023-0400
ADST
ADF
Channel 0 (AN0)
operating
Channel 1 (AN1)
operating
Channel 2 (AN2)
operating
Channel 3 (AN3)
operating
ADDRA0
ADDRB0
ADDRC0
ADDRD0
Waiting
Waiting
Waiting
Waiting
Waiting
Waiting
Waiting
Waiting
Waiting
Transfer
A/D conversion 1
A/D conversion 4
A/D conversion 2
A/D conversion 3
A/D conversion result 1
A/D conversion result 4
A/D conversion result 2
A/D conversion result 3
Clear
*
1
Clear
*
1
Set
*
1
Continuous A/D conversion
A/D conversion 5
Notes: 1. Vertical arrows ( ) indicate instruction execution by software.
2. A/D conversion data is invalid/
*
2
Figure 21.4 Example of A/D Converter Operation
(Scan Mode, Channels AN0 to AN2 Selected)
21.3.4
Simultaneous Sampling Operation
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.
Содержание HD6417641
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Страница 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
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Страница 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Страница 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Страница 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Страница 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
Страница 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
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Страница 1036: ...SH7641 Hardware Manual...