st2024c Sitronix Technology Corporation, st2024c Datasheet - Page 28

• Manufacturer Part Number: st2024c
• Description: 24k 8-bit Single Chip Microcontroller
• Manufacturer: Sitronix Technology Corporation

1
The built-in dual channel Programmable Sound Generator
(PSG) is controlled by registers directly. Its flexibility through
setting several parameters to registers makes it useful in
many applications, such as music synthesis, sound effects
generation, audible alarms and tone generation. PSG will
finish the reset when user needs to create sound effect. The
Ver 2.2
1
3
3
.
.
DACE
From DAC Generator
VOL1[3~0]
PSGC[3]
PSGC[2]
P
P
DACE
DACE
S
S
G
G
C1out
PSGC[6~4]
SYSCK
OSCX
BDB
BD
Preload Data Before First Count
CH1
Vol_CH1
MIXER
IN0
IN1
Output
FIGURE 13-10: Program Sound Generator
C1TEN
C1NEN
PSG Selector
FIGURE 13-9: Clock Source for PSG
Select
Output
Channel 1 Tone
Channel 1 Noise
Enable
LOAD
Enable Output
IN0
IN1
IN0
IN1
MUX2
PSGCK
28/54
SEL
MUX2
Output
SEL
OUTPUT
OUTPUT
structure of PSG is shown in Figure 12-10 and its clock
sources are shown in Figure 12-9. The ST2024C has three
PSG playing type.one for channel0(C0) & channel1(C1)
square type sound playing.One for ch0 square tone sound
and ch1 noise sound.The third sound playing type is DAC
PCM playing.
C1Tone
C1Noise
B6 B5 B4
PSGOUT
PSGOUTB
X
X
0
0
1
IN0
IN1
PSGC
MUX2
SEL
OUTPUT
0
0
1
1
0
To Port B
0
1
0
1
0
C1out
SYSCK/2
SYSCK/4
SYSCK/8
SYSCK/16
SYSCK
PSGCK
ST2024C
1/31/08