Panasonic MN103S

Chapter 10
Motor Control PWM
Operation X - 19
10.3 Operation
10.3.1 Motor Control PWM Operation
■ Waveform Mode
Waveform mode can be set by the WAVEMDn flag of the PWM mode control register (PWMMDn). When “0” is
set, triangular waves are specified and “1” is set, saw-tooth waves are specified.
Table: 10.3.1 shows the output waveform logic operation formula and output level.
Table:10.3.1 Logic Operation Formula and Output Level
When triangular waves are set, the counter counts up and down. It counts the period setting and “0” twice each at
the end of counting up and down. When saw-tooth waves are set, the counter counts up. After the counter counts
up until the period setting value, it becomes “0” at the next counting . Triangular and saw-tooth wave output fig-
ures are shown below.
Figure:10.3.1 Triangular and Saw-tooth Waves
Logic operation formula PWMn0 to 2 NPWMn0 to 2
Value to be compared≤Counter value H L
Value to be compared
>
Counter value
LH
(1) (2) (3) (4) (5) (6) (7) (8)(0)
Count value ( max:FFFF)
Count value
( min:0000 )
PWM period setting
(PWMSETn)
PWM0 phase value to be
compared setting
( TCMPnA)
PWM count value
PWMn0
NPWMn0
PWMn1
NPWMn1
PWMn2
NPWMn2
Count value ( max:FFFF)
Count value
( min:0000 )
PWMn0
NPWMn0
PWMn1
NPWMn1
PWMn2
NPWMn2
(1) (2) (3) (4) (5) (6) (7) (8)(0)
WAVEMDn = 0
PXDT(U, V, W)n=0
PXDTN(U, V, W)n=0
WAVEMDn = 0
PXDT(U, V, W)n=0
PXDTN(U, V, W)n=0
PWM0 phase value to be
compared setting
(TCMPnB )
PWM0 phase value to be
compared setting
(TCMPnC)
PWM period setting
(PWMSETn)
PWM0 phase value to be
compared setting
( TCMPnA)
PWM0 phase value to be
compared setting
(TCMPnB )
PWM0 phase value to be
compared setting
(TCMPnC)
PWM count value