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7721 Arkusz danych(PDF) 164 Page - Renesas Technology Corp

Numer części 7721
Szczegółowy opis  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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Producent  RENESAS [Renesas Technology Corp]
Strona internetowa  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7721 Arkusz danych(HTML) 164 Page - Renesas Technology Corp

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TIMER A
7721 Group User’s Manual
8–45
8.6 Pulse width modulation (PWM) mode
Fig. 8.6.6 Operation example of 8-bit pulse width modulator
Œ Count source
TAjIN pin’s
input signal
1 / fi ! (m+1) ! (28 –1)
PWM pulse output
from TAjOUT pin
Note: The above applies when the reload register’s high-order 8 bits (n) = “0216”
and low-order 8 bits (m) = “0216” and an external trigger (falling edge of TAjIN pin
input signal) is selected.
Timer Aj interrupt
request bit
Cleared to “0” when interrupt request is accepted or cleared by software.
fi: Frequency of count source
(f2, f16, f64, or f512)
Œ The 8-bit prescaler counts the count source.
 The 8-bit pulse width modulator counts the 8-bit prescaler’s underflow signal.
 8-bit prescaler’s
underflow signal
1 / fi ! (m+1) ! (n)
1 / fi ! (m+1)



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