r8a66170dd Renesas Electronics Corporation., r8a66170dd Datasheet - Page 8

• Manufacturer Part Number: r8a66170dd
• Description: 4-ch 16-bit Pwm Generator
• Manufacturer: Renesas Electronics Corporation.

R8A66170DD/SP
(b) Internal trigger selected (D1 = 0 in command 1)
In this mode, the trigger signal is generated by the prescaler. Therefore, the cycle time T of output pulse is determined
by the prescaler register value L.
In this case, the oscillator source becomes the PWM counter clock and the output pulse width is determined by the
PWM register value M. (See Fig.6)
Fig.6 (When H width polarity is “H”)
In Mode 1, the retrigger state is caused when the cycle time of trigger pulse gets smaller than the value M of PWM
register.
REJ03F0272-0100 Rev.1.00 Apr.01.2008
Page 8 of 20
Internal signal
PWM output
Prescaler output
(Internal trigger)
(at L = 11)
Oscillator source
M=0
M=1
M=2
M=3
・
・
・
"L"
f (X
M
IN
)
f (X
1
IN
)
f (X
L+1
T=
IN
)
f (X
L+1
IN
)
T
f(X
L
M
IN
) :Oscillator frequency (MHz)
:
:Prescaler set value
:
Cycle time (μs)
Ｈ width set value