D12320VF25V Datasheet, PDF (383/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 16-Bit Timer Pulse Unit (TPU)
9.4.3 Synchronous Operation
In synchronous operation, the values in a number of TCNT counters can be rewritten
simultaneously (synchronous presetting). Also, a number of TCNT counters can be cleared
simultaneously by making the appropriate setting in TCR (synchronous clearing).
Synchronous operation enables TGR to be incremented with respect to a single time base.
Channels 0 to 5 can all be designated for synchronous operation.
Example of Synchronous Operation Setting Procedure: Figure 9.14 shows an example of the
synchronous operation setting procedure.
Synchronous operation
selection
Set synchronous
operation
[1]
Synchronous presetting
Synchronous clearing
Set TCNT
[2]
Clearing
No
source generation
channel?
Yes
Select counter
clearing source
[3]
Start count
[5]
Set synchronous
counter clearing
[4]
Start count
[5]
<Synchronous presetting>
<Counter clearing>
<Synchronous clearing>
[1] Set to 1 the SYNC bits in TSYR corresponding to the channels to be designated for synchronous operation.
[2] When the TCNT counter of any of the channels designated for synchronous operation is written to, the
same value is simultaneously written to the other TCNT counters.
[3] Use bits CCLR2 to CCLR0 in TCR to specify TCNT clearing by input capture/output compare, etc.
[4] Use bits CCLR2 to CCLR0 in TCR to designate synchronous clearing for the counter clearing source.
[5] Set to 1 the CST bits in TSTR for the relevant channels, to start the count operation.
Figure 9.14 Example of Synchronous Operation Setting Procedure
Rev.7.00 Feb. 14, 2007 page 349 of 1108
REJ09B0089-0700