HD64F3039F18 Datasheet, PDF (309/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 8 16-Bit Integrated Timer Unit (ITU)
Note on Synchronous Preset
When channels are synchronized, if a TCNT value is modified by byte write access, all 16 bits of
all synchronized counters assume the same value as the counter that was addressed.
(Example) When channels 2 and 3 are synchronized
• Byte write to channel 2 or byte write to channel 3
TCNT2
W
X
TCNT3
Y
Z
Upper byte Lower byte
Write A to upper byte
of channel 2
Write A to lower byte
of channel 3
• Word write to channel 2 or word write to channel 3
TCNT2
A
X
TCNT3
A
X
Upper byte Lower byte
TCNT2
Y
A
TCNT3
Y
A
Upper byte Lower byte
TCNT2
W
X
TCNT3
Y
Z
Upper byte Lower byte
Write AB word to
channel 2 or 3
TCNT2
A
B
TCNT3
A
B
Upper byte Lower byte
Note on Setup of Reset-Synchronized PWM Mode and Complementary PWM Mode
When setting bits CMD1 and CMD0 in TFCR, take the following precautions:
• Write to bits CMD1 and CMD0 only when TCNT3 and TCNT4 are stopped.
• Do not switch directly between reset-synchronized PWM mode and complementary PWM
mode. First switch to normal mode (by clearing bit CMD1 to 0), then select reset-synchronized
PWM mode or complementary PWM mode.
Rev.3.00 Mar. 26, 2007 Page 285 of 682
REJ09B0353-0300