This specification contains ADVANCE INFORMATION data. ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best
possible product. We assume no responsibility for any errors which may appear in this publication. Copyright 1999, Integrated Silicon Solution, Inc.
IS22C012
ADVANCE INFORMATION
FEBRUARY 1999
VERSATILE 10 SEC INSTANT
VOICE ROM
GENERAL DESCRIPTION
IS22C012 is a high quality voice synthesizer capable of
varying playback duration. A proprietary ADPCM algorithm
is used. The audio message is stored in a 256K bits on-
chip EPROM which can store up to ten seconds of voice
data at 6 KHz sample rate.
The IS22C012 eliminates the need of complicated circuitry
in voice playback but still achieves high voice quality.
Sounds such as human speech, animal sounds, musical
sounds and even special sound effects can be synthesized.
Versatile combinations in sections achieve longer playback
duration. In addition, devices can be cascaded to achieve
longer voice duration. Two devices can be configured in
parallel in order to achieve signal mixing without an external
mixer in which speech can be mixed with background
music each from one of two different chips.
The IS22C012 provides wide operating voltage range
from 2.4V to 6.0V. PWM digital amplifier output pins, V
OUT
1
and V
OUT
2
provides direct drive to buzzer or speaker.
A current output pin, C
OUT
, enables the device to drive a
speaker through a low cost NPN transistor. No complex
filtering or amplifier circuit is needed. An automatic ramp-
down function eliminates undesired noise at the end of
playback.
FEATURES
Minimum 10 second voice length at 6 KHz
Versatile features for playback
Combination of voice building blocks
extends the duration of playback
Voice data re-use saves memory space
Four trigger pins, S1 to S4 for eight groups
SBT for sequential play-all
Holdable and unholdable, edge and level
triggering option
15 ms debounce time suitable for CDS
IRP interrupt pin for master reset
Three programmable output pins for STP Stop
Pulse, BUSY Signal, and LED
Built-in oscillator with variable sample rate
Single external resistor to determine sample rate
Built-in D/A converter, EPROM
ADPCM data compression provides high sound
quality
Optional pop noise elimination function
C
OUT
pin drives speaker with a transistor
V
OUT
1
and V
OUT
2
drives buzzer or speaker
directly
Auto-power down
2.4V-6V single power supply operation
Low standby current (<5
A at 3V)
Development tools support
Group of sections
The voice data memory area of the IS22C012 can be
subdivided into 124 sections. Any combination of these
sections will form an individual group for data playback. A
maximum of eight groups are available with activation
controlled by S1 to S4 pins. The SBT pin can be used to
trigger multiple groups playback in sequence.
Group Configuration
Voice within each group are combinations of different fixed
memory sections of up to 124 sections. These sections are
the fundamental voice building blocks for arranging
playback without limiting sequencing. This provides
flexibility and allows data to be re-used, beneficial for
applications with many repeated sounds or words.
An example of group configuration is illustrated below:
Group No.
Section Entry
Group 1
Sec 1 + Sec 2 + Sec 3 ....... Sec 109
Group 2
Sec 3 + Sec 2
Group 3
Sec 10 + Sec 11 + Sec 12
Group 4
Sec110 + Sec 10 + Sec 5
ISSI
Integrated Silicon Solution, Inc. -- 1-800-379-4774
1
ADVANCE INFORMATION VP010-0B
02/24/99
IS22C012
2
Integrated Silicon Solution, Inc. -- 1-800-379-4774
ADVANCE INFORMATION VP010-0B
02/24/99
ISSI
Group Configuration
(continued)
The entry of sections for each group is truly random and
without limitation. However, there is a limit in the total
number of entries for eight groups, which is 992 in the
IS22C012. It is acceptable to allocate all entries into only
one group or distribute out to other groups. It depends on
how many groups of messages are required.
Programmable Options
Groups in IS22C012 can have independent options. They
include:
Edge or Level trigger
Unholdable or Holdable trigger
Retriggerable or non-retriggerable
LED1, LED2, Busy, and Stop pulse are configurable
Four selections in playback frequency
Selections in Triggering
The IS22C012 can be triggered in different ways, Edge or
Level trigger, Holdable or Unholdable, Retriggerable or
Non-retriggerable. The combinations of the triggering op-
tions provide versatile playback.
By enabling Retrigger, the playback can be controlled in
Stop and Start mode. A trigger on any trigger pin will stop the
content message and start the next message immediately.
Selections in Playback Frequency
This option provides four choices for each group in frequency
which implies it is possible to have four different sampling
rates in one chip or one sample rate with a different playback
frequency. As a matter of fact, the available choices are also
dependent on the pullup resistor value at the OSC pin. For
example, if the fundamental frequency choice is F, it can
provide choices in x1, x1-1/2, x2, x3.
Selections in Output Buffer
There are three independent output pins, OUT1, OUT2, and
OUT3, available for several combinations of LED1, LED2,
Stop Pulse, and Busy Signal for each group. The following
table illustrates the four different combinations.
OUT1
OUT2
OUT3
1.
LED1
LED2
Busy
2.
STOP
LED1
LED2
3.
Busy
Stop
LED1
4.
LED2
Busy
Stop
LED1 and LED2 are complemented outputs flashing at
approximately a 3 Hz rate. Stop pulse (STOP) gives a 15 ms
positive pulse at the end of the playback for each Group with
option have or do not have the Stop pulse.
Busy is active high and Section dependent but not Group
dependent. Even if same section in different group may
have different output in Busy output. For instance, BUSY
can be high for Section 4 in Group 1 but low in Group 4.
BUSY can be used as a synchronous signal. During standby
mode all three outputs must be low.
Software Support
ISSI provides dedicated software to the customer. With this
tool, the customer can compose their own messages and
configure the chip to fit intor their applications very easily.
IS22C012
Integrated Silicon Solution, Inc. -- 1-800-379-4774
3
ADVANCE INFORMATION VP010-0B
02/24/99
ISSI
OSCILLATOR
OSC
CLOCK
GENERATOR
CONTROL
LOGIC
S1
S2
S3
S4
SBT
IRP
OUTPUT
DRIVER
OUT1
OUT2
OUT3
POP NOISE
REDUCTION
ADDRESS
SEQUENCER
VOICE
EPROM
ADPCM
DECODER
BUZZER
BUFFER
D/A
C
OUT
V
OUT1
V
OUT2
GND
V
CC
BLOCK DIAGRAM
IS22C012
4
Integrated Silicon Solution, Inc. -- 1-800-379-4774
ADVANCE INFORMATION VP010-0B
02/24/99
ISSI
PIN DESCRIPTION
OUT1
Programmable output 1
OUT2
Programmable output 2
OUT3
Programmable output 3
V
OUT
1
PWM audio signal output for buzzer and speaker
V
OUT
2
PWM audio signal output for buzzer and speaker
GND
Power ground
C
OUT
Current output from internal DAC for speaker playback
OSC
Oscillator resistor pin to control sampling frequency
V
PP
Program power supply, no connect when voice playback
S1
Trigger switch 1, internal pull low, active high
S2
Trigger switch 2, internal pull low, active high
V
CC
Positive power supply
S3
Trigger switch 3, internal pull low, active high
S4
Trigger switch 4, internal pull low, active high
SBT
Sequential trigger, internal pull low, active high
IRP
Interrupt to stop playback, internal pull low, active high
Note:
1. The following pins are used to program data into the memory: pins 4, 5, 6,
8, 9, 12, 15 and 16.
BONDING PARAMETERS
Pin
Name
X
Y
1
OUT1
204
678
2
V
OUT1
423
678
3
V
OUT2
718
678
4
GND
893
678
5
OUT2
786
677
6
OUT3
590
677
7
C
OUT
167
677
8
OSC
89
677
9
V
PP
306
677
10
S1
483
677
11
S2
691
677
12
V
CC
899
677
13
S3
796
678
14
S4
588
678
15
SBT
380
678
16
IRP
172
678
BONDING DIAGRAM
Note: Programming requires connection to
pins 4, 5, 6, 8, 9, 12, 15, and 16.
PIN CONFIGURATIONS
300-mil PDIP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OUT1
V
OUT1
V
OUT2
GND
OUT2
OUT3
C
OUT
OSC
IRP
SBT
S4
S3
V
CC
S2
S1
V
PP
12
11
10
9
8
7
6
5
13
14
15
16
2
4
1
3
NC
NC
(0,0)
X
Y
Note: Substrate must be connected to GND
Pad size = 80
m x 80
m
Die size = 2128 x 1635
m
83.78 x 64.37 mil
IS22C012
Integrated Silicon Solution, Inc. -- 1-800-379-4774
5
ADVANCE INFORMATION VP010-0B
02/24/99
ISSI
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
CC
- GND
Terminal Voltage with Respect to GND
0.5 to +7.0
V
V
IN
GND 0.3 < V
IN
< V
CC
+ 0.3
V
V
OUT
GND < V
OUT
< V
CC
V
T
A
Operating Temperature
10 to +85
C
T
STG
Storage Temperature
55 to +125
C
DC CHARACTERISTICS
Symbol Parameter Description
Test Conditions
Min.
Typ.
Max.
Unit
V
CC
Operating Voltage
2.4
3.0
6.0
V
I
SB
Standby Current
Vcc = 3.0V, I/O Open
--
1
5
A
I
OP
Operating Current
Vcc = 3.0V, I/O Open
--
--
100
A
V
IH
Input HIGH Voltage
Vcc = 3.0V
2.5
3.0
3.5
V
V
IL
Input LOW Voltage
Vcc = 2.0V
0.3
0
0.3
V
I
OH
V
OUT
HIGH Operating Current
Vcc = 3.0V, V
OUT
= 3.0V
--
12
--
mA
I
OL
V
OUT
LOW Operating Current
Vcc = 3.0V, V
OUT
= 0V
--
12
--
mA
I
CO
C
OUT
Operating Current
Vcc = 3.0V, V
COUT
= 0.7V
--
2
--
mA
I
STPH
STP HIGH Operating Current
Vcc = 3.0V, V
STP
= 3.0V
--
5
--
mA
I
STPL
STP LOW Operating Current
Vcc = 3.0V, V
STP
= 0V
--
5
--
mA
I
LED
LED Output Current
Vcc = 2.2V 6.0V
6
8
10
mA
F/F
Frequency Stability
(F
OSC
[3V] F
OSC
[3.5V]) / F
OSC
(3.0V) --
--
5
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