HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 518

• Manufacturer Part Number: HD6412332
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

10.4.3
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 5 can all be designated for synchronous operation.
Example of Synchronous Operation Setting Procedure: Figure 10.14 shows an example of the
synchronous operation setting procedure.
Rev.4.00 Sep. 07, 2007 Page 488 of 1210
REJ09B0245-0400
[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
[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.
same value is simultaneously written to the other TCNT counters.
<Synchronous presetting>
Synchronous Operation
Synchronous presetting
Synchronous operation
Figure 10.14 Example of Synchronous Operation Setting Procedure
Set synchronous
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]