CHAPTER 28 SOUND GENERATOR
28.1
Outline of Sound Generator
The Sound Generator consists of the Sound Control Register, Frequency Data Register,
Amplitude Data Register, Decrement Grade Register, Tone Count Register, PWM Pulse
Generator, Frequency Counter, Decrement Counter and Tone Pulse Counter.
■ Block diagram of Sound Generator
Peripheral clock CLKP2
Prescaler
S1
S0
708
Figure 28.1-1 Block diagram of Sound Generator
FSEL
8bit PWM pulse
Generator
CO
EN
FSEL=0: 384 counts
PWM
FSEL=1: 256 counts
reload
Amplitude Data
register
DEC
Decrement
Counter
CI
CO
EN
Decrement Grade
register
Tone Pulse
Counter
CI
CO
EN
Tone Count
register
MB96300 Super Series Hardware Manual
Frequency
counter
CI
CO
EN
reload
Frequency Data
Register
DEC
OE1
Mix
TONE
INTE
INT
ST
Toggle
Flip-Flop
Q
D
EN
1/d
SGA
SGO
OE2
IRQ