Renesas M32R/ECU Series User Manual page 426

10
(a) When reload register updates take effect in the current period (reflected in the next period)
Reload 0 register
Reload 1 register
(b) When reload register updates take effect in the next period (reflected one period later)
Reload 0 register
Reload 1 register
F/F output
Note: • This diagram does not show detailed timing information.
Figure 10.8.12 Reload 0 and Reload 1 Register Updates in PWM Output Mode (For 0% or 100% Duty-Cycle Wave Output)
H'1000
H'2000
Old PWM output period
F/F output
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
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
H'2000
Reload 1 buffer
F/F output
10.8 TOU (Output-Related 24-Bit Timer)
Write to reload 0
(Reload 1 data latched)
Write to reload 1
FFFF
H'9000
H'0000 H'FFFF
H'1000
H'2000
H'2000
PWM period latched
Write to reload 0
(Reload 1 data latched)
Write to reload 1
H'9000
H'0000 H'FFFF H'0FFF
H'1000
H'9000
H'2000
PWM period latched
Timing at which reload 0 and reload 1
registers are updated
10-183
MULTIJUNCTION TIMERS
New PWM
output period
Operation by new reload value written
New PWM output period
FFFF 8FFF
FFFF
H'9000
H'9000
FFFF
Old PWM
output period
Operation by old reload value
Old PWM output period
H'0FFE
FFFF
H'9000
32180 Group User's Manual (Rev.1.0)