TIMER A
7.6 Pulse width modulation (PWM) mode
(1 / f
) ➀ (m + 1) ➀ (28 – 1)
i
➀ Count source
TAjIN pin’s
input signal
(1 / f) ➀ (m + 1)
i
➀ 8-bit prescaler’s
underflow signal
(1 / f) ➀ (m + 1) ➀ (n)
i
PWM pulse output
from TAjOUT pin
Timer Aj interrupt
request bit
Cleared to “0” when interrupt request is accepted or cleared by software.
fi: Frequency of count source
n: Reload register’s high-order 8 bits
m: Reload register’s low-order 8 bits
➀ The 8-bit prescaler counts the count source.
➀ The 8-bit pulse width modulator counts the 8-bit prescaler’s underflow signal.
Note: The above applies when n = “0216”, m = “0216”, and an external trigger
(falling edge of TAjIN pin’s input signal) is selected.
Fig. 7.6.6 Operation example of 8-bit pulse width modulator
7906 Group User’s Manual Rev.2.0
7-45
RENESAS [ RENESAS TECHNOLOGY CORP ]
