m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 148

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

Fig. 7.6.5 Operation example of 16-bit pulse width modulator
Fig. 7.6.6 Operation example of 16-bit pulse width modulator (when counter value is updated during
input signal
PWM pulse
output from
TAi
TAi
TAi
OUT
IN
f
n: Reload register’s contents
PWM pulse output
i
IN
(2
: Frequency of count source
Note: The above applies when n = “0003
Timer Ai interrupt
pin’s
pin
16
pin’s input signal
from TAi
pulse output)
FFFE
–1) – n
Note: The above applies when an external trigger (rising edge of TAi
0001
2000
Count source
request bit
f
n: Reload register
signal) is selected.
i
depends on the timing when the new value is set.
: Frequency of count source
16
16
16
When an arbitrary value is set to the timer Ai register after setting “0000
n
OUT
n = Reload register’s contents
pin
(1 / f
“FFFE
i
)
(2
16
16
” is set to timer Ai
–1)
7905 Group User’s Manual Rev.1.0
register.
16
” and an external trigger (rising edge of TAi
Trigger is not generated by this signal.
(1 / f
(1 / f
(1 / f
i
)
“0000
Cleared to “0” when interrupt request is accepted
or cleared by software.
i
)
i
)
(2
7.6 Pulse width modulation (PWM) mode
16
(2
16
” is set to timer Ai
(n)
16
– 1)
IN
–1)
pin’s input signal) is selected.
register.
16
” to it, the timing when the PWM pulse goes “H”
counting.
Stops
“2000
16
Restarts counting.
” is set to timer Ai
IN
(1 / f
register.
pin’s input
i
)
(2 –1)
16
TIMER A
Time
7-45