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Block diagram – FUJITSU MB91460 SERIES FR60 User Manual

Page 880

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Chapter 42 Sound Generator

2.Block Diagram

2. Block Diagram

8bit PWM pulse

Generator

Prescaler

S1 S0

Amplitude Data

register

CO

EN

PWM

DEC

CLKP

Tone Pulse

Counter

EN

CO

CI

Tone Count

register

Decrement

Counter

EN

CO

CI

Decrement

Grade register

Frequency

Counter

EN

CO

Frequency

register

CI

Toggle

flip-flop

EN

D

Q

reload

1/d

reload

DEC

TONE

Mix

SGA

SGO

INTE INT

ST

IRQ

S2