Renesas M32R/ECU Series User Manual page 362

10
(a) When reload register updates take effect in the current period (reflected in the next period)
Reload 0 register
Reload 1 register
F/F output
(b) When reload register updates take effect in the next period (reflected one period later)
Reload 0 register
Reload 1 register
F/F output
Figure 10.4.11 Reload 0 and Reload 1 Register Updates in PWM Output Mode
Write to reload 1
H'1000
H'2000
Old PWM
output period
Enlarged
view
Count clock
Counter H'0001
Interrupt due
to underflow
Reload 0 register
Reload 1 register
Reload 1 buffer
F/F output
Timing at which reload 0 and reload 1
registers are updated
Write to reload 1
H'1000
H'2000
Old PWM
output period
Enlarged
view
Count clock
Counter
H'0001
Interrupt due
to underflow
Reload 0 register
H'2000
Reload 1 register
Reload 1 buffer
F/F output
Timing at which reload 0 and reload 1
Note: • This diagram does not show detailed timing information.
10.4 TIO (Input/Output-Related 16-Bit Timer)
Write to reload 0
(Reload 1 data latched)
H'8000
H'9000
Operation by new reload value written
New PWM
output period
H'0000 H'FFFF H'7FFF
H'1000 H'8000
H'2000 H'9000
H'2000 H'9000
PWM period latched
Write to reload 0
(Reload 1 data latched)
H'9000
Old PWM
output period
H'0000 H'FFFF H'0FFF
H'1000
H'9000
H'2000
PWM period latched
registers are updated
10-119
MULTIJUNCTION TIMERS
New PWM
output period
H'7FFE
H'8000
Old PWM
output period
Operation by old reload value
H'0FFE
H'8000
H'9000
32180 Group User's Manual (Rev.1.0)