Renesas H8S/2318 series, Hardware Manual

Page: 335 / 1121

Rev. 5.00, 12/03, page 305 of 1088
Bits 7 to 5—Counter Clear 2 to 0 (CCLR2 to CCLR0): These bits select the TCNT counter
clearing source.
Channel
Bit 7
CCLR2 Bit 6
CCLR1 Bit 5
CCLR0
Description
0, 3 0 0 0 TCNT clearing disabled (Initial value)
1 TCNT cleared by TGRA compare match/input
capture
1 0 TCNT cleared by TGRB compare match/input
capture
1 TCNT cleared by counter clearing for another
channel performing synchronous clearing/
synchronous operation
*
1
1 0 0 TCNT clearing disabled
1 TCNT cleared by TGRC compare match/input
capture
*
2
1 0 TCNT cleared by TGRD compare match/input
capture
*
2
1 TCNT cleared by counter clearing for another
channel performing synchronous clearing/
synchronous operation
*
1
Channel
Bit 7
Reserved
*
3
Bit 6
CCLR1 Bit 5
CCLR0
Description
1, 2, 4, 5 0 0 0 TCNT clearing disabled (Initial value)
1 TCNT cleared by TGRA compare match/input
capture
1 0 TCNT cleared by TGRB compare match/input
capture
1 TCNT cleared by counter clearing for another
channel performing synchronous clearing/
synchronous operation
*
1
Notes: 1. Synchronous operation setting is performed by setting the SYNC bit in TSYR to 1.
2. When TGRC or TGRD is used as a buffer register, TCNT is not cleared because the
buffer register setting has priority, and compare match/input capture does not occur.
3. Bit 7 is reserved in channels 1, 2, 4, and 5. It is always read as 0 and cannot be
modified.