Section 20 16-Bit Timer Pulse Unit (TPU)
Rev. 1.00 Oct. 01, 2007 Page 730 of 1956
REJ09B0256-0100
20.4.2 Basic
Functions
(1) Counter
Operation
When one of bits CST[0:3] is set to 1 in TSTR, the TCNT counter for the corresponding channel
starts counting. TCNT can operate as a free-running counter, periodic counter, and so on.
(a) Example of count operation setting procedure
Figure 20.2 shows an example of the count operation setting procedure.
Select counter clock
Operation selection
Select counter clearing source
Periodic counter
Set period
Start count
<Periodic counter>
[1]
[2]
[4]
[3]
[6]
Free-running counter
Start count
<Free-running counter>
[6]
Set external pin function
[5]
[1]
[2]
[3]
[4]
[5]
[6]
Select output compare register
Set external pin function
[5]
Select the counter clock
with bits TPSC2 to TPSC0
in TCR. At the same time
select the input clock edge
with bits CKEG1 and
CKEG0 in TCR.
For periodic counter
operation, select the TGRA
to be used as the TCNT
clearing source with bits
CCLR2 to CCLR0 in TCR.
Designate the output compare
register by means of TIOR.
Set the periodic counter cycle
in the TGRA.
Set the external pin function
in pin function controller (PFC).
Set the CST bit in TSTR to 1
to start the counter operation.
Figure 20.2 Example of Counter Operation Setting Procedure
Содержание SH7763
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Страница 686: ...Section 14 Direct Memory Access Controller DMAC Rev 1 00 Oct 01 2007 Page 620 of 1956 REJ09B0256 0100 ...
Страница 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
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Страница 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
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Страница 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Страница 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Страница 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Страница 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
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