HD6417616 RENESAS [Renesas Technology Corp], HD6417616 Datasheet - Page 742

• Manufacturer Part Number: HD6417616
• Description: 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 17 16-Bit Timer Pulse Unit (TPU)
17.4.3
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 2 can all be designated for synchronous operation.
Example of Synchronous Operation Setting Procedure: Figure 17.14 shows an example of the
synchronous operation setting procedure.
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<Synchronous presetting>
Synchronous presetting
1
2
3
4
5
Synchronous operation
Synchronous Operation
Set synchronous
Figure 17.14 Example of Synchronous Operation Setting Procedure
Set to 1 the SYNC bits in TSYR corresponding to the channels to be designated for synchronous
operation.
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.
Use bits CCLR2 to CCLR0 in TCR to specify TCNT clearing by input capture/output compare,
etc.
Use bits CCLR2 to CCLR0 in TCR to designate synchronous clearing for the counter clearing
source.
Set to 1 the CST bits in TSTR for the relevant channels, to start the count operation.
Set TCNT
operation
selection
1
2
Synchronous clearing
<Counter clearing>
source generation
clearing source
Select counter
Start count
channel?
Clearing
Yes
No
3
5
<Synchronous clearing>
Set synchronous
counter clearing
Start count
4
5