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ISD1900
ISD1900
32
SINGLE-CHIP, MULTIPLE-MESSAGE
33
VOICE RECORD/PLAYBACK DEVICE
34
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Publication Release Date: Jan 5, 2009
1 Revision 0.51
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ISD1900
TABLE OF CONTENTS
1. GENERAL DESCRIPTION ...............................................................................................................................3
2. FEATURES.......................................................................................................................................................3
2.1. Address Mode........................................................................................................................................... 3
2.2. Direct Mode............................................................................................................................................... 4
3. BLOCK DIAGRAM ............................................................................................................................................5
4. PIN CONFIGURATION.....................................................................................................................................6
5. PIN DESCRIPTION ..........................................................................................................................................8
6. FUNCTIONAL DESCRIPTION .......................................................................................................................11
6.1. Address Mode......................................................................................................................................... 11
6.1.1 Record (¯R¯E¯C¯) Operation................................................................................................................. 12
6.1.2 Edge-triggered Playback (¯P¯la¯y¯E¯) Operation................................................................................... 14
6.1.3 Level-triggered Playback (¯P¯la¯y¯L¯) Operation................................................................................... 14
6.1.4 Playback (Supersedes Record) Operation...................................................................................... 15
6.1.5 XCLK Feature .................................................................................................................................. 16
6.2. Direct Mode............................................................................................................................................. 16
6.3. Other Operations .................................................................................................................................... 19
6.3.1 Rosc Operation................................................................................................................................ 19
6.3.2
6.3.3
LED Operation ................................................................................................................................. 20
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Feed-Through mode Operation....................................................................................................... 20
6.3.4 Power-On Playback Operation........................................................................................................ 20
6.3.5 Automatic Single Message Playback .............................................................................................. 20
6.3.6 Power is interrupted Abruptly .......................................................................................................... 20
7. ABSOLUTE MAXIMUM RATINGS [1]..............................................................................................................21
7.1. Operating Conditions .............................................................................................................................. 21
8. ELECTRICAL CHARACTERISTICS ..............................................................................................................22
8.1. DC Parameters ....................................................................................................................................... 22
8.2. AC Parameters ....................................................................................................................................... 23
9. TYPICAL APPLICATION CIRCUIT ................................................................................................................24
10. PACKAGING...................................................................................................................................................26
10.1. 28-Lead 300-Mil Plastic Small Outline Integrated Circuit (SOIC) ....................................................... 26
11. ORDERING INFORMATION ..........................................................................................................................27
12. VERSION HISTORY.......................................................................................................................................28
Publication Release Date: Jan 5, 2009
2 Revision 0.51
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ISD1900
1. GENERAL DESCRIPTION
0
Nuvoton’s ISD1900 ChipCorder® Series is a single-chip multiple-message record/playback device with dual
operating modes and wide operating voltage ranging from 2.4V to 5.5V. The sampling frequency can be
selected from 4 to 12 kHz via an external resistor, which also determines the duration. The device is designed
for mostly standalone applications, and of course, it can be manipulated by a microcontroller, if necessary.
The two operating modes are Address Mode and Direct Mode. While in Address Mode, both record and
playback operations are manipulated according to the start address and end address specified through the start
address and end address pins. In Direct Mode, the device can configure the memory up to as many as eight
similar duration messages, pending upon the fixed message configuration settings. With the record or
playback feature being pre-selected, each message can be randomly accessed via its message control pin.
The device has a selectable differential microphone input with AGC feature or single-ended analog input, AnaIn,
under feed-through mode. The audio output is either a differential Class-D PWM direct-drive or a single-ended
voltage output (AUX out), depending on the derivative selected.
2. FEATURES
1
The ISD1900 is a multiple messages record/playback device with two operational modes: Address Mode and
Direct Mode.
Supply voltage: 2.4V to 5.5V.
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External resistor, Rosc, selects sampling frequency and duration.
Sampling Frequency
12 kHz
8 kHz
6.4 kHz
Rosc
53.3 K
80 K
100 K
ISD1916
10.6 sec 16 sec
20 sec
ISD1932
21.3 sec 32 sec
40 sec
ISD1964
42.6 sec 64 sec
80 sec
5.3 kHz
120 K
24 sec
48 sec
96 sec
4 kHz
160 K
32 sec
64 sec
128 sec
Mic+/Mic-: differential microphone inputs.
AGC: automatic gain control for microphone preamp circuit.
F¯¯T: feed-through the AnaIn signal to the speaker outputs while AnaIn is converted from MIC+.
When both F¯¯T and recording are active, device will record AnaIn signal into memory with AnaIn signal output
to speaker simultaneously.
SP+/SP-: Class-D PWM differential speaker drivers or single-ended voltage output, depending on the
derivative selected.
¯L¯E¯D¯: LED is on during recording.
Automatically power down after each operation cycle.
Playback takes precedence over the recording operation.
y Temperature option: -40°C to +85°C (Industrial)
y Packaging: available in SOIC only
2.1. ADDRESS MODE
12
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ISD1900
While in Address Mode, flexible message duration is defined by start address and end address.
Utilize four start address pins (S0, S1, S2 & S3) and four end address pins (E0, E1, E2 & E3) to specify
the message duration.
¯R¯E¯C¯: Level-hold or Edge-trigger (toggle on-off) recording from start to end addresses.
¯P¯la¯y¯E¯: Edge-trigger playback from start to end address and stops at EOM marker, if EOM is prior to
end address. Toggle on-off.
¯P¯la¯y¯L¯: Level-hold playback from start to end address. Also, if constantly Low, device will loop
playback from start to end address.
2.2. DIRECT MODE
13
While Direct Mode is active, utilizing the configuration pins, FMC1, FMC2 & FMC3, to define up to eight
similar duration messages for random access.
The control pins are: M¯¯1 ~ M¯¯8 (message activation) and ¯R¯/P (record or playback selection).
The record or playback operation is pre-defined by the ¯R¯/P pin.
Each message can be randomly accessed via its message control pin (M¯¯1 ~ M¯¯8) and the desired
operation is facilitated accordingly.
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ISD1900
3. BLOCK DIAGRAM
2
Rosc
MIC+ /
AnaIn
MIC- /
NC
AGC
Clock Control
Pre-
Amp
Amp
Antialiasing
Filter
Non-Volatile
Multi Level Storage
Array
Automatic
Gain Control
(AGC)
Device & Address Control
Switch
Smoothing
Filter
Amp
Power Conditioning
SP + /
AUX
SP - /
NC
Address Mode: Addr LED FT XCLK PlayE PlayL REC S0 S1 S2 S3 E0 E1 E2 E3
Direct Mode: Drct LED FT FMC3 FMC2 FMC1 R/P M1 M2 M3 M4 M5 M6 M7 M8
Figure 3-1 Block Diagram
VCCA VSSA VCCD VSSD VCCp VSSP1 VSSP2
Publication Release Date: Jan 5, 2009
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