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7721 Scheda tecnica(PDF) 164 Page - Renesas Technology Corp

Il numero della parte 7721
Spiegazioni elettronici  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7721 Scheda tecnica(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
ΠCount 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)
ΠThe 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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