Download ISD-ES1900_DEMO User Manual

ISD-DEMO1900
REV_A
ISD-ES1900_DEMO User Manual
Version 0.1
Board version: Rev_A
Publication Release Date: Jan 28, 2009
-1-
Revision 0.1
ISD-DEMO1900
REV_A
Contents
Board Overview............................................................................................................................................. 3
PWM vs AUX ............................................................................................................................................. 4
Default settings ......................................................................................................................................... 5
Operation ...................................................................................................................................................... 6
Address Mode operation .......................................................................................................................... 6
Direct Mode Operation ............................................................................................................................. 7
PWM only – vs – AUX only ........................................................................................................................ 8
Note: ............................................................................................................................................................. 9
Board Schematic ......................................................................................................................................... 10
Publication Release Date: Jan 28, 2009
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ISD-DEMO1900
REV_A
Board Overview
This manual is for ISD-DEMO1900 Rev_A.
Figure 1 -- Top view of ISD-DEMO1900 Rev_A board
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Figure 2 – Top view of demo board PCB silk label
PWM vs AUX
Based on the output type, the ISD1900 series devices fall into two groups: PWM-Output only and AUXOutput only. Judged by part number, if the device’s part number ends with 01 then it is AUX output only;
otherwise it is PWM output only. For example part number “1932SYI” indicates that the device’s output
is PWM output. In contrary, “1932SYI01” means device‘s output is AUX output.
ISD1900 device PWM output can drive a speaker directly, while AUX output needs to be amplified
before driving a speaker.
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For demo boards with AUX output, users can choose either to use the on board LM386 to amplify the
ISD1900 device output signal then connect to a speaker, to evaluate the sound; or draw the signal out to
their own amplifier for further evaluation.
As a reminder, please check what kind of ISD1900 device is populated on your demo board, before
heading for further evaluation.
Figure 3 is attached below aiming to help user to judge what kind of ISD1900 device is on the demo
board.
Figure 3 – ISD1900 ordering information  AUX out type device has “01” ending.
Default settings
The following pictures show the default jumper settings
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Figure 4 – Address Mode Settings
REV_A
Figure 5 – Direct Mode Settings
Operation
The recommended operation sequence is, step by step
1. Connect jumpers, set switch positions, connect speaker;
2. Without power connected, press CHG_MODE button (located at the upper-left corner of the
board) to fully discharge the ISD1900 device.
This step is to prevent confusion when user changes operation mode between Address Mode
and Direct Mode. If device is not fully discharged during mode change, device may stall.
3. Apply power;
4. Use function buttons such as PL (Level-hold play), PE (Edge trigger play), REC and Message
buttons (SW1-SW8) to record and playback messages.
This board only supports MIC +/- record.
o Once power is on and there is no mode change, user can change start address/end
address or FMC values (U1 setting) at any time. There is no need to discharge device
during operation.
Address Mode operation
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No matter what kind of ISD1900 device is used on demo board, for Address Mode operation, jumper
settings need to follow the list below:
-
Address Mode jumper/switches settings (shown in Figure 4):
o U1 – put all 4 switches at middle position (floating).
o U2 – all 8 switches will be at either left or right position, to indicate a definite start
address and an end address.
 Start address can be any number between 0000 to 1111;
 End address needs to be equal or greater than the start address.
o
o
J1 – at right, connects 1 &2  Address Mode.
Install jumper to choose sampling frequency. In Figure 4, 8 KHz sampling frequency is
chosen.
-
Connect speaker at J6 (if PWM only device), press CHG_MODE once, apply power.
*Note: It is always recommended to press CHG_MODE right before applying power.
-
Since the start address (U3 S0-S3) and the end address (E0-E3) are set, user can now press
o PL – level hold play to play;
o PE – Edge trigger play to play;
o REC – to record
Direct Mode Operation
No matter what kind of ISD1900 device is used on demo board, for Direct Mode operation, jumper
settings need to follow the list below:
-
Direct Mode jumper/switches settings (shown in Figure 5):
o U1 –all 4 switches need be at either left or right position, to indicate a definite FMC
value and operation mode: to record or to play.


Record or playback
U1 REC/R/P is at left (0) position – to record;
U1 REC/R/P is at right (1) position – to play;
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FMC values table
FMC3
FMC2
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
o
o
o
-
FMC1
0
1
0
1
0
1
0
1
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Number of messages
1
2
3
4
5
6
7
8
U2 – all 8 switches need be at middle position (floating)
J1 – at left, connects 2&3.
Install jumper to choose sampling frequency. In Figure 5, 8 KHz sampling frequency is
chosen.
Connect speaker at J6 (if PWM only device), press CHG_MODE once, apply power,
Since the FMC value is set, depends on how many messages can be recorded and playback, user
can now press message button M1-M8 to
o Record a message if U1 REC/R/P is at left position  to record;
o Playback a message if U1 REC/R/P is at right position  to play.
o
PWM only – vs – AUX only
The only difference between PWM mode and AUX mode operations is that the jumper settings are
different.
For PWM only devices:
- Connect speaker at J6: AUX speaker.
- Do not install J9, J10, J11 and J13.
For AUX only devices:
-
Do not install J6.
Connect speaker at J13: AUX speaker.
J10  connected at 1&2; Aux output signal will be sent to amplifier.
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J11  connected at 1&2; Aux amplifier will be powered.
Note:
ISD-DEMO1900 Rev_A has no support on ANAIN recording function. This is a design miss. However, user
can wire the signal to MIC+, install Jumper J2 (FT) to evaluate this function. This requires user to modify
the board hardware before being able to do so. We will revise the demo board and shall bring user the
convenience to evaluate ANAIN record/playback functions with the next version.
Publication Release Date: Jan 28, 2009
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Board Schematic
Mode Select:
1->ADDR; 0->DRCT
VCCD
Chg_Mode
VCCD
1
Rec
P1
XCLK/FMC3
PE
PL
1
SW3
2
1
SW4
2
U2
5k
REC
PE/FMC2
PL/FMC1
1
VSSD
P2
S0
2
S1
3
S2
4
S3
5
PL/FMC1
6
E0
7
VSSA
8
E1
9
R4
E2
10
5k
E3
11
P
P3
N
P4
Tri_State_DIP_4_Switch (EG4516-ND)
VCCD
U3
2
2
SW5
1
S0
P1
S1
SW6
1
2
SW7
1
2
SW8
1
P
N
P5
2
SW10
1
VCCD
S0/M1
NORM/Mode
S1/M2
FT
S2/M3
XCLK/FMC3
S3/M4
REC / R/P
Play L/FMC1 Play E/FMC2
E0/M5
LED
VSSA
VCCA
E1/M6
ROSC
E2/M7
MIC-
E3/M8
MIC+
VSSP2
AGC
SP-
VSSP1
VCCP
VCCP
SP+
ISD1900
28
Mode
VCCD
J2
26
FT
25
XCLK/FMC3
24
REC
23
PE/FMC2
22
LED
21
VCCA
20
ROSC
19
MIC-
18
MIC+ C2
2
1
D1
R3 1k
2
1
2
2
SW12
1
53K 1
R5
C1
0.1uF
R6
80K
R7
100K
R11
DNP
1
17
AGC
16
VSSP1
15
SP+
J3
12KHz
2
J4
8KHz
2
J5
6.4KHz
2
0.1uF
C3
1
4.7uF
1
J8
2
Sp+
I14B00X Die
J6
1
2
P8
HEADER 2_1
Tri_State_DIP_8_Switch (EG4555-ND)
SW11
1
VCCD
LED
VCCA
P7
E3
SW1
2
1
Mode_Select
27
PWM
SPEAKER
+
-
2
VSSD
R2 5k
1
2
3
Norm
P6
E2
SW9
1
VCCP 14
P4
E1
13
SP-
P3
S3
E0
12
VSSP2
P2
S2
J1
R1
U1
SW2
2
X1
MIC
R8
VCCA
C4
4.7K
1
2
4.7uF
R9
Knowels
(423-1023-ND)
4.7K
R10
4.7K
1
AUX
AuxOut
2
J9
POWER
+
-
VCCD
VCCA
VCCA
J10
CON3
C13
R12 1.2K
10uF
2
0
3
0
R17
2
R16
GND
1
VCC
FB2
3
FB1
1
1
2
VCCP
SP+
J7
HEADER 2_1
FB3
J11
CON3
AUX
U5
C14 4.7uF
1
2
C15
1uF
R13 5k
3
4
VCCD
GAIN
-INPUT
BY PASS
+INPUT
VS
GND
VOUT
8
7
6
5
VCCP
VCCP
VCCA
GAIN
J13
VCC
VCCA
VCCD
VCCP
C16
VCCP
R14
C18
C19
0.1uF
10uF
C9
C10
C11
C12
C7
C8
C5
C6
10uF
0.1uF
10uF
0.1uF
5k
10uF
0.1uF
VSSD
10uF
0.1uF
VSSA
VSSP2
220uf
1
2
LM386
R15
10
HEADER 2_1
VSSP1
C17
0.047uF
AUX SPEAKER
Publication Release Date: Jan 28, 2009
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Revision 0.1