IS22C040
BLOCK DIAGRAM
ISSI ®
OSC
S1
S8
SBT
IRP
LED2
LED1
STP
OSCILLATOR
CLOCK
GENERATOR
CONTROL
LOGIC
LED
DRIVER
ADDRESS
SEQUENCER
Vcc
VOICE
EPROM
GND
ADPCM
DECODER
POP NOISE
REDUCTION
D/A
BUZZER
BUFFER
COUT
VOUT1
VOUT2
Programmable Options
The IS22C040 provides different control functions for
user specified applications. They include:
• Non-sequential or Sequential Play-all
• Unholdable or Holdable trigger
• STOP or BUSY signal selection
• Automaticramp-up/ramp-downornoramp-up/ramp-down
Silence Compression
If a particular sound sequence includes periods of silence,
the IS22C040 will automatically compress the silence to
save memory space. This compression will not affect
playback of the sound sequence.
2
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. D
02/25/00