7906 datasheet(148/531 Pages) RENESAS

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7906 Datasheet(PDF) 148 Page - Renesas Technology Corp

Part #	7906

Description	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	531 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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148 / 531 page

TIMER A

7906 Group User’s Manual Rev.2.0

7-45

7.6 Pulse width modulation (PWM) mode

Fig. 7.6.6 Operation example of 8-bit pulse width modulator

➀ Count source

TAjIN pin’s

input signal

(1 / fi) ✕ (m + 1) ✕ (28 – 1)

PWM pulse output

from TAjOUT pin

Note: The above applies when n = “0216”, m = “0216”, and an external trigger

(falling edge of TAjIN pin’s 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

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.

➁ The 8-bit pulse width modulator counts the 8-bit prescaler’s underflow signal.

➁ 8-bit prescaler’s

underflow signal

(1 / fi) ✕ (m + 1) ✕ (n)

(1 / fi) ✕ (m + 1)

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