Winbond ISD1750A Multi-message single-chip voice record&playback device Datasheet

ADVANCED
ISD1700A
Series
Multi-Message
Single-Chip
Voice Record & Playback Devices
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Publication Release Date: March 28, 2005
Revision A0
ISD1700A SERIES
TABLE OF CONTENTS
1
GENERAL DESCRIPTION ..............................................................................................................4
2
FEATURES......................................................................................................................................5
3
BLOCK DIAGRAM...........................................................................................................................6
4
PINOUT CONFIGURATION............................................................................................................7
5
PIN DESCRIPTION .........................................................................................................................8
6
FUNCTIONAL DESCRIPTION ......................................................................................................11
6.1 Detailed Description...............................................................................................................11
6.1.1 Audio Quality ...............................................................................................................11
6.1.2 Message Duration........................................................................................................11
6.1.3 Flash Storage ..............................................................................................................11
6.2 Memory Array Architecture ....................................................................................................11
6.3 Modes of Operations..............................................................................................................12
7
PUSH-BUTTON OPERATIONS ....................................................................................................13
7.1 Operation Overview ...............................................................................................................13
7.1.1 Record Operation ........................................................................................................13
7.1.2 Playback Operation .....................................................................................................14
7.1.3 Forward Operation.......................................................................................................14
7.1.4 Erase Operation...........................................................................................................15
7.1.5 Reset Operation...........................................................................................................16
7.1.6 VOL Operation.............................................................................................................17
7.1.7 FT (Feed-Through) Operation .....................................................................................17
7.2 vAlert Feature (Optional)........................................................................................................17
7.3 Sound Effect (SE) Editing ......................................................................................................17
7.3.1 Sound Effects ..............................................................................................................17
7.3.2 Entering SE Mode........................................................................................................18
7.3.3 SE Editing ....................................................................................................................18
7.3.4 Exiting SE Mode ..........................................................................................................18
7.3.5 Sound Effect Duration..................................................................................................18
7.4 Analog Inputs .........................................................................................................................19
7.4.1 Microphone Input .........................................................................................................19
7.4.2 AnaIn Input...................................................................................................................19
8
TIMING DIAGRAMS ......................................................................................................................20
8.1 Record, play and erase..........................................................................................................20
9
ABSOLUTE MAXIMUM RATINGS ................................................................................................23
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9.1 Operating Conditions .............................................................................................................23
10
ELECTRICAL CHARACTERISTICS .............................................................................................24
10.1 DC Parameters ......................................................................................................................24
10.2 AC Parameters.......................................................................................................................25
11
TYPICAL APPLICATION CIRCUITS.............................................................................................26
11.1 Good Audio Design Practices ................................................................................................27
12
DIE PHYSICAL LAYOUT...............................................................................................................28
12.1 ISD1740A/50A/60A................................................................................................................28
13
ORDERING INFORMATION .........................................................................................................29
14
VERSION HISTORY......................................................................................................................30
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1 GENERAL DESCRIPTION
The Winbond® ISD1700A ChipCorder® Series is a high quality, fully integrated, single-chip multimessage voice record and playback device ideally suited to a variety of electronic systems. The
message duration is user selectable in ranges from 26 seconds to 120 seconds, depending on the
specific device. The sampling frequency of each device can also be adjusted from 4 kHz to 12 kHz
with an external resistor, giving the user greater flexibility in duration versus recording quality for each
application. Operating voltage spans a range from 2.4 V to 5.5 V to ensure that the ISD1740A/50A/60A
devices are optimized for a wide range of battery or line-powered applications.
The ISD1740A/50A/60A devices incorporate a proprietary message management system that allows
the chip to self-manage address locations for multiple messages. This unique feature provides
sophisticated messaging flexibility in a simple push-button environment. The devices include an onchip oscillator (with external resistor control), microphone preamplifier with Automatic Gain Control
(AGC), an auxiliary analog input, anti-aliasing filter, Multi-Level Storage (MLS) array, smoothing filter,
volume control, Pulse Width Modulation (PWM) Class D speaker driver, and current output.
The ISD1740A/50A/60A devices also support an optional “vAlert” (voiceAlert) feature that can be used
as a new message indicator. With vAlert, the IC strobes an external LED to indicate that a new
message is present. Four special sound effect locations are reserved for audio confirmation of
commands, such as “Start Record”, “Stop Record,” and “Erase.”
Recordings are stored in on-chip Flash memory cells, providing zero-power message storage. This
unique single-chip solution is made possible through Winbond’s patented Multi-Level Storage (MLS)
technology. Audio data are stored directly in solid-state memory without digital compression, providing
superior quality voice and music reproduction.
Voice signals can be fed into the chip through two independent paths: a differential microphone input
and a single-ended analog input. For outputs, the ISD1740A/50A/60A devices simultaneously provide
a Pulse Width Modulation (PWM) Class D speaker driver and a separate current output. The PWM can
directly drive a standard 8 Ω speaker or a typical buzzer, while the separate single-ended current
output can drive an external amplifier.
The ISD1740A/50A/60A devices automatically enter into power down mode for power conservation
when an operation is completed.
Notice: The specifications are subject to change without notice. Please contact Winbond Sales Offices
or Representatives to verify current or future specifications.
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2 FEATURES
•
Integrated message management systems for single-chip, push-button applications
o REC : level-trigger for recording
o PLAY : edge-trigger for individual message or level-trigger for sequential playback
o ERASE : edge-triggered erase for first or last message or level-triggered erase for all messages
o FWD : edge-trigger to advance to the next message or fast message scan during the playback
o
VOL
: 8 levels output volume control
o RDY: ready or busy status indication
o RESET : bring back to the default state
o Automatic power-down after each operation cycle
•
Selectable sampling frequency controlled by an external oscillator resistor
Sampling Frequency
Rosc
•
12 kHz
60 kΩ
8 kHz
80 kΩ
6.4 kHz
100 kΩ
5.3 kHz
120 kΩ
4 kHz
160 kΩ
Selectable message duration
Device
Duration
ISD1740A
26 ~ 80 sec
ISD1750A
33 ~ 100 sec
ISD1760A
40 ~ 120 sec
y Message and operation indicators
o Four customizable Sound Effects (SE) for audible indications
o Optional vAlert (voiceAlert) to indicate the presence of new messages
o LED: stay on during recording, blink during playback, forward and erase operations
y Two individual input channels
o MIC+/MIC-: differential microphone inputs with AGC (Automatic Gain Control)
o AnaIn: single-ended auxiliary analog input for recording or feed-through
y Dual output channels
o PWM Class D speaker amplifier to directly drive an 8 Ω speaker or a typical buzzer
o AUD single-ended current output to drive external power amplifier
• ChipCorder standard features
o High-quality, natural voice and audio reproduction
o 2.4V to 5.5V operating voltage
o 100-year message retention (typical)
o 10,000 record cycles (typical)
Commercial Temperature grade: 0°C to +50°C for die only
y Package options: available in die only
•
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3 BLOCK DIAGRAM
Internal
Clock
ROSC
MIC+
MICAGC
Sampling
Clock
AnaIn
Amp
Amp
MUX
AnaIn
Timing
AntiAliasing
Filter
Nonvolatile
Multi-Level Storage
Array
Smoothing
Filter
AUD
SP+
Volume
Control
Amp
SP-
AGC
Amp
Automatic
Gain Control
Power Conditioning
VCCA VSSA VCCP VSSP1 VSSP2 VSSD VCCD
Others
Device Control
REC PLAY ERASE FWD FT RESET VOL
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RDY LED
NC TE1
TE2
TE3
ISD1700A SERIES
4 PINOUT CONFIGURATION
V CCD
1
28
V SSD
LED
2
27
RDY
RESET
3
26
FWD
NC
4
25
ERASE
TE1
5
24
REC
TE2
6
23
PLAY
TE3
7
22
FT
V SSA
8
21
V CCA
AnaIn
9
20
R OSC
MIC+
10
19
VOL
MIC-
11
18
AGC
V SSP2
12
17
AUD
SP-
13
16
V SSP1
V CCP
14
15
SP+
ISD1740A
ISD1750A
ISD1760A
PDIP
Samples Only
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5 PIN DESCRIPTION
PIN NAME
PDIP
PIN NO.
FUNCTIONS
VCCD
1
LED
2
RESET
3
NC
TE1
TE2
TE3
4
5
6
7
Digital Power Supply: It is important to have a separate path for each
power signal including VCCD, VCCA and VCCP to minimize the noise
coupling. Decoupling capacitors should be as close to the device as
possible.
LED: This output turns on a LED during a record cycle and blinks LED
during playback, forward and erase operations.
RESET: When Low, the device enters into a known state and initializes all
pointers to the default state. This pin has an internal pull-up resistor [1].
NC: No Connect.
Test pin #1: Connect to VCCD.
Test pin #2: Connect to VCCD.
Test pin #3: Connect to VCCD.
VSSA
8
AnaIn
9
MIC+
10
MIC-
11
VSSP2
12
SP-
13
VCCP
14
SP+
15
Analog Ground: It is important to have a separate path for each ground
signal including VSSA, VSSD, VSSP1 and VSSP2 to minimize the noise
coupling.
AnaIn: Auxiliary analog input to the device for recording or feed-through.
An AC-coupling capacitor (typical 0.1uF) is necessary and the amplitude
of the input signal should not exceed 1.0 Vpp.
MIC+: Non-inverting input of the differential microphone signal. The input
signal should be AC-coupled to this pin via a series capacitor. The
capacitor value, together with an internal 10 KΩ resistance on this pin,
determines the low-frequency cutoff for the pass band filter.
MIC-: Inverting input of the differential microphone signal. The input signal
should be AC-coupled to the MIC+ pin. It provides input noisecancellation, or common-mode rejection, when the microphone is
connected differentially to the device.
Ground for Negative PWM Speaker Driver: It is important to have a
separate path for each ground signal including VSSA, VSSD, VSSP1 and VSSP2
to minimize the noise coupling.
SP-: The negative Class D PWM provides a differential output with SP+
pin to directly drive an 8 Ω speaker or typical buzzer. During power down
or recording, this pin is tri-stated.
Power Supply for PWM Speaker Driver: It is important to have a
separate path for each power signal including VCCD, VCCA and VCCP to
minimize the noise coupling. Decoupling capacitors to VSSP1 and VSSP2
should be as close to the device as possible. The VCCP supply and VSSP
ground pins have large transient currents and need low impedance
returns to the system supply and ground, respectively.
SP+: The positive Class D PWM provides a differential output with the
SP- pin to directly drive an 8 Ω speaker or typical buzzer. During power
down or recording, this pin is tri-stated.
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PIN NAME
PDIP
PIN NO.
FUNCTIONS
VSSP1
16
AUD
17
Ground for Positive PWM Speaker Driver: It is important to have a
separate path for each ground signal including VSSA, VSSD, VSSP1 and VSSP2
to minimize the noise coupling.
Auxiliary Output: AUD is a single-ended current output. It can be used to
drive an external amplifier.
AGC
18
VOL
19
ROSC
20
VCCA
21
FT
22
PLAY
23
Automatic Gain Control (AGC): The AGC adjusts the gain of the
preamplifier dynamically to compensate for the wide range of microphone
input levels. The AGC allows the full range of signals to be recorded with
minimal distortion. The AGC is designed to operate with a nominal
capacitor of 4.7 µF connected to this pin.
Connecting this pin to ground (VSSA) provides maximum gain to the
preamplifier circuitry. Conversely, connecting this pin to the power supply
(VCCA) provides minimum gain to the preamplifier circuitry.
Volume Control: This control has 8 steps of volume adjustment. Each
Low pulse decreases the volume by one level. Repeated pulses decrease
the volume level from the current setting to the minimum then increase
back to the maximum, and continue this loop. The factory default is set at
maximum. This pin has an internal pull-up device [1] and an internal
debounce (TDeb) [2] for start and end, allowing the use of a push button
switch.
Oscillator Resistor: A resistor connected from ROSC pin to ground
determines the sample frequency of the device, which sets the duration.
Please refer to the Duration Section for details.
Analog Power Supply. It is important to have a separate path for each
power signal including VCCD, VCCA and VCCP to minimize the noise
coupling. Decoupling capacitors to VSSA should be as close to the device
as possible.
Feed-through: When FT is engaged Low, the AnaIn feed-through path is
activated. As a result, the AnaIn signal is transmitted directly from AnaIn
to both the Speaker and AUD outputs, via the volume control circuit. This
pin has an internal pull-up device [1] and an internal debounce (TDeb) [2] for
start and end, allowing the use of a push button switch.
Playback: Pulsing PLAY to Low once initiates a playback operation.
Playback stops automatically when it reaches the end of the message.
Pulsing it to Low again during playback stops the operation.
Holding PLAY Low constantly functions as a sequential playback
operation loop. This looping continues until PLAY returns to High. This
pin has an internal pull-up device [1] and an internal debounce (TDeb) [2] for
start and end, allowing the use of a push button switch.
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PIN NAME
PDIP
PIN NO.
FUNCTIONS
REC
24
ERASE
25
FWD
26
RDY
27
Record: The device starts recording whenever REC switches from High
to Low and stays at Low. Recording stops when the signal returns to
High. This pin has an internal pull-up device [1] and an internal debounce
(TDeb) [2] for start and end, allowing the use of a push button switch.
Erase: When active, it starts an erase operation. Erase operation will take
place only when the playback pointer is positioned at either the first or last
message. Pulsing this pin to Low enables erase operation and deletes the
current message. Holding this pin Low for more than 3 sec. initiates a
global erase operation, and will delete all the messages. This pin has an
internal pull-up device [1] and an internal debounce (TDeb) [2] for start and
end, allowing the use of a push button switch.
Forward: When triggered, it advances to the next message from the
current location, when the device is in power down status. During
playback cycle, pulsing this pin Low stops the current playback operation
and advances to the next message, and then re-starts the playback
operation of the new message. This pin has an internal pull-up device [1]
and an internal debounce (TDeb) [2] for start and end, allowing the use of a
push button switch.
Ready: An open drain output. This pin stays Low during record, play,
erase and forward operations and stays High in power down state.
VSSD
28
Note: [1] 600 kΩ
Digital Ground: It is important to have a separate path for each ground
signal including VSSA, VSSD, VSSP1 and VSSP2 to minimize the noise
coupling..
[2]
TDeb = Refer to AC Timing
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6 FUNCTIONAL DESCRIPTION
6.1 DETAILED DESCRIPTION
6.1.1
Audio Quality
Winbond’s patented ChipCorder® Multi-Level Storage (MLS) technology provides a natural,
high-quality record and playback solution on a single chip. The input voice signals are stored
directly in the Flash memory and are reproduced in their natural form without any of the
compression artifacts caused by digital speech solutions.
6.1.2
Message Duration
The ISD1740A/50A/60A devices offer record and playback duration from 26 seconds to 120
seconds. Sampling rate and message duration are determined by an external resistor
connected to the ROSC pin.
Table 6.1 Duration vs. Sampling Frequency
Sample Rate
12 kHz
8 kHz
6.4 kHz
5.3 kHz
4 kHz
6.1.3
ISD1740A
26 sec
40 sec
50 sec
60 sec
80 sec
ISD1750A
33 sec
50 sec
62 sec
75 sec
100 sec
ISD1760A
40 sec
60 sec
75 sec
90 sec
120 sec
Flash Storage
The ISD1740A/50A/60A devices utilize embedded Flash memory to provide non-volatile
storage. A message can be retained for a minimum of 100 years without power. Additionally,
each device can be re-recorded over 10,000 times (typical).
6.2 MEMORY ARRAY ARCHITECTURE
The memory array provides storage for four special Sound Effects (SE) and the audio data. The
memory array is addressed by rows. A row is the minimum storage resolution by which the
memory can be addressed. The memory assignment is handled automatically by the internal
message management system.
The four sound effects occupy four rows of the first sixteen rows in the memory array. The
minimum storage resolution varies with the sampling frequency, as shown in Table 6.2.
Table 6.2 Minimum Storage Resolution vs. Sampling Frequency
Sampling Frequency
Minimum Storage Resolution
12 kHz
8 kHz
6.4 kHz
5.3 kHz
4 kHz
83.3 msec
125 msec
156 msec
187 msec
250 msec
For example, at 8 kHz sampling frequency, the minimum storage resolution is 125 msec, so, each
Sound Effect (SE) is approximately 0.5 seconds long. The remaining memory is dedicated to audio
data storage.
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6.3
MODES OF OPERATIONS
The ISD1740A/50A/60A devices are designed to operate in push-button operation only.
Push-button operation entails use of the REC , PLAY , FT , FWD , ERASE , VOL and
RESET pins to trigger operations. The internal state machine automatically configures the signal
path according to the operation requested. In this mode of operation, the internal state machine
takes full control of message management. This allows the user to record, playback, erase, and
forward messages without the needs to know the exact addresses of the messages storage inside
the memory. For additional information, please refer to Section 7.
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ISD1700A SERIES
7 PUSH-BUTTON OPERATIONS
The user utilizes the REC , PLAY , FT , FWD , ERASE , VOL or RESET pin to initiate an operation.
The device automatically enters the power-down state at the end of a PLAY, REC, ERASE, FWD,
VOL, or RESET operation.
7.1 OPERATION OVERVIEW
After power-on-reset (POR), the device is in the factory default state and two internal record and
playback pointers are initialized. (Detailed information about these two pointers is provided later in
this Section.) Then, the active analog path configuration is determined by the state of the FT , and
by the operation requested (e.g. record, playback, or power down).
Up to four optional sound effects (SE1-4) can be programmed into the device to provide audible
feedback to alert the user about the operating status. Separately, the LED output provides visual
feedback on the operating state even if no sound effects are programmed.
A circular message management technique is implemented. Recorded messages are stored
sequentially into the memory from the beginning to the end in a circular manner.
Two internal pointers, the record pointer and playback pointer, determine the point at which an
operation starts. After power-on or RESET , these pointers are initialized as follows:
• If no messages are present, both point to the beginning.
• If messages are present, the record pointer points to the next available memory location after
the last message and the playback pointer points to the beginning of the last recorded
message.
The playback pointer is affected primarily by the FWD operation. The record pointer is updated to
the next available memory location after each REC operation.
7.1.1
Record Operation
Recording is controlled by the REC . Setting this pin Low starts a record operation. The
device will start recording from the next available location in memory and will continue
recording until either the REC is returned High or the memory becomes full. The source of
the recording is from either MIC or AnaIn, whereas the active analog configuration path is
determined by the desired operation and the state of the FT . The REC is debounced
internally. After recording, the record pointer will move from the last recorded message to the
next available address and the playback pointer will be positioned at the beginning of the
newly recorded message.
It is important for an Erase operation to be performed on the desired location before any
recording proceeds. Also, the power supply must remain On during the entire process of
recording. If power is interrupted during recording, the LED will blink seven times, which
indicates that something unusual has occurred. In this event, performing a Global Erase will
reset the chip back to its proper state.
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Message record indicators:
a) When REC goes Low:
• If present, SE1 is played and LED flashes once.
• Then, the LED stays On to indicate that a recording is in progress.
b) When REC goes High or when the memory is full:
• If present, SE2 is played and the LED flashes twice, and then remains Off to alert the
user that the recording process has been completed.
Triggering of REC during a play, erase or forward operation is an illegal operation and will be
ignored.
7.1.2
Playback Operation
Two playback modes are executed by PLAY , which is internally debounced.
a) Edge-trigger mode: Pulsing PLAY Low once initiates a playback operation of the current
message. Playback automatically stops at the end of the message. Pulsing PLAY again
will re-play the message. During playback, the LED flashes and goes Off when the
operation stops. Pulsing PLAY to Low again during playback stops the operation. Under
these circumstances, the playback pointer remains at the start of the played message after
the operation is completed.
b) Sequential Playback mode: If PLAY is held Low constantly, all messages will be played
and looped from the current message to its previous message. This looping continues until
PLAY is released. After each message, SE1 is played. After the last message has been
played, SE2 is played, and then device plays the first message again. During the entire
playback operation, the LED flashes. When playback stops, the playback pointer will be
placed at the start of the halted message.
Triggering PLAY during a record, erase, or forward operation is an illegal operation and will
be ignored.
7.1.3
Forward Operation
The FWD allows the user to move the playback pointer to the next message in a forward
direction. When the pointer reaches the last message, it will jump back to the first message.
Hence, the movement is in a circular fashion among the messages. The FWD is debounced
internally. The effect of a Low-going pulse on the FWD depends on the current state of the
device:
a) If the device is in power-down state and the current location of the playback pointer is not
the last message: the pointer will advance one message and, if present, SE1 is played.
The LED flashes once.
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b) If the device is in power-down state and the current location of the play pointer is the last
message: the pointer will advance to the first message and, if present, SE2 is played. The
LED will flash twice.
c) If the device is currently playing a message that is not the last one:
• Playback is halted.
• The playback pointer is advanced one message.
• If present, SE1 is played.
• Playback of the next message begins.
• The LED flashes during this entire process.
d)If the device is currently playing a message that is the last one:
• Playback is halted.
• The playback pointer is advanced to the first message.
• If present, SE2 is played.
• Playback of the first message begins.
• The LED flashes during this entire process.
Triggering of the FWD operation during an erase or record operation is an illegal operation
and will be ignored.
7.1.4
Erase Operation
Erasing individual message takes place only if the playback pointer is at either the first or the
last message. Erasing individual messages other than the first or last message is not
possible. However, global erase can be executed at any message location and will erase all
messages. These two erase modes are characterized as follows:
a) Individual Erase: Only the first or last messages can be individually erased. Pulsing
ERASE Low performs actions dependent upon the current location of the playback
pointer:
• If the device is idle and the playback pointer is currently pointing to the first message:
o
First message is erased.
o
SE2, if present, will be played and the LED will flash twice.
o
Playback pointer will be updated to point to the new first message (previously, the
second message).
• If the device is idle and the playback pointer is currently pointing to the last message:
o
Last message is erased.
o
SE2, if present, will be played and the LED will flash twice.
o
Playback pointer will be updated to point to the new last message (previously, the
second to last message).
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• If the device is idle and the playback pointer is not currently pointing to the first or last
message:
o
No message is erased.
o
SE3, if present, will be played and the LED will flash twice.
o
Play pointer will be unchanged.
• If the device is currently playing the first or last message, pressing ERASE will delete
the current message, as in the related cases described above.
b) Global Erase: Level-triggering this pin at Low for more than 2.5 seconds initiates the
Global Erase operation and deletes all messages, except the SEs. If SEs are present, the
device will play SE1 three times after ERASE is held for 2.5 seconds. If ERASE is not
released during the playback of SE1, all messages will be erased, and the chip will play
SE4. See Figure 7.1 for the operation details. The ERASE is debounced internally.
Triggering ERASE for individual erase during a record or forward operation is an illegal
operation and will be ignored. However, triggering ERASE for an individual erase operation
during playback will delete the current played message, if it is the first or last one.
Global Erase Starts here
ERASE key is Pressed and Held
2.5 seconds
Case 1 :
Current messge location : 1st or Last
Erase 1st
or last
message
Play
SE2
Play
SE1
Wait
Play
SE1
Play
SE1
Global
Erase
Play
SE4
Global
Erase
Play
SE4
Play SE1 3 times to Warn for
Glabal Erase to start.
Release ERASE key to abort the
operation
Case 2 :
Current messge location : Not at 1st or Last
Play
SE3
Wait
Play
SE1
Play
SE1
Play
SE1
Figure 7.1: Global Erase Operation
7.1.5
Reset Operation
A 0.1 µF capacitor is recommended to connect RESET to ground if a push button switch is
used on this pin. When RESET is triggered, the device will place both the record and the
playback pointers at the last message. When a microcontroller is used for a power-on-Reset,
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ISD1700A SERIES
RESET must stay active for at least 1 µsec after all supply rails reach their proper
specifications.
7.1.6
VOL Operation
Pulsing VOL Low changes the volume output. Each pulse on VOL will decrease the volume
until the minimum setting is reached. Subsequent pulses will increase the volume until the
maximum level is reached and the cycle will start again. There are 8 steps of volume control.
Each step changes the volume by 4 dB. The VOL is debounced internally. A
RESET operation will re-initialize the volume level to the default state, which is the maximum
level.
7.1.7
FT (Feed-Through) Operation
The FT controls the feed-through path from the input to the output of the chip. When FT is
held Low, FT mode is enabled. By factory default, FT mode will pass AnaIn to SPK and AUD
outputs if the device is idle. It will record AnaIn to the memory during a record operation.
7.2
VALERT FEATURE (OPTIONAL)
If this optional feature is enabled, after a recording operation, the LED output will blink once every
few seconds to indicate the presence of a new message. After a subsequent playback operation,
the vAlert will stop flashing.
7.3 SOUND EFFECT (SE) EDITING
SE editing can be accessed via push buttons. The first sixteen addresses are shared equally by
four Sound Effects (SE1, SE2, SE3, and SE4).
7.3.1
Sound Effects
The functions of SEs are as follows:
o
SE1: Beginning of recording, forward or global erase warning
o
SE2: End of recording, single erase or forward from last message
o
SE3: Invalid operation
o
SE4: Global erase
Whether or not the SEs are programmed, the LED will flash accordingly. The LED flashes
once for SE1, twice for SE2, and so on. The frequency of flashing depends upon the
sampling frequency selected and the power supply level used.
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Publication Release Date: March 28, 2005
Revision A0
ISD1700A SERIES
7.3.2
Entering SE Mode
•
First press and hold FWD Low for more than 3 seconds. This action on FWD will play
SE1 and cause the LED to blink once (if at the last message location, the chip will play
SE2 and the LED will blink twice).
•
While holding FWD Low, press and hold the REC Low until the LED blinks once. The
device is now in SE editing mode.
•
The LED flashing once indicates that SE1 is accessible.
7.3.3
SE Editing
•
When in SE editing mode, one can perform record, play, or erase operation on each SE
by pressing the appropriate button. For example, to record SE, simply press and hold
REC . Similarly for play and erase functions, press and hold PLAY or ERASE ,
respectively.
•
A FWD operation moves the record and playback pointers to the next SE sequentially.
The LED will blink 1~4 times after such operations to indicate which SE is active. If FWD
is pressed while accessing SE4, the LED will flash once to indicate that SE1 is again
active.
•
While the LED is blinking, the device will ignore any input commands. The User must
wait until the LED stops blinking before any record, play or erase command can be sent.
7.3.4
•
Exiting SE Mode
First press and hold FWD until the LED stops blinking. Then, simultaneously press and
hold the REC Low until the LED blinks twice and SE2 (if present) is played. The device
has now exited from SE editing mode.
7.3.5
Sound Effect Duration
The duration of sound effects is determined by the sampling frequency selected. All sound
effects with the same sampling frequency have the same duration.
Table 8.1 Sound Effect Duration vs. Sampling Frequency
Sampling Frequency
Duration of SE
12 kHz
8 kHz
6.4 kHz
5.3 kHz
4 kHz
0.33 sec
0.5 sec
0.625 sec
0.75 sec
1 sec
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ISD1700A SERIES
7.4 ANALOG INPUTS
7.4.1
Microphone Input
INTERNAL TO THE DEVICE
Ccoup
0.1uF
Ra = 7K
MIC +
Ccoup
0.1uF
AGC
MIC IN
Ra = 7K
MIC Fcutoff=1/(2*pi*Ra*Ccoup)
Figure 7.2: MIC input impedance (When this path is active)
7.4.2
AnaIn Input
INTERNAL TO THE DEVICE
R a = 42K
Ccoup
0.1uF
R a = 42K
ANAIN
ANAIN INPUT AMPLIFIER
Fcutoff=1/(2*pi*Ra*Ccoup)
Figure 7.3: AnaIn input impedance (When the device is powered-up)
Confidential
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Publication Release Date: March 28, 2005
Revision A0
ISD1700A SERIES
8 TIMING DIAGRAMS
8.1 RECORD, PLAY AND ERASE
Tr
Tf
REC
TDeb
TDeb
TSTOP
RDY
TSE2
TSET
LED
TSE1
Mic+/-,
AnaIn
Figure 8.1: Record Operation
- 20 -
ISD1700A SERIES
Tr
Tf
PLAY
TDeb
TDeb
TPStop
RDY
TPSetUp
LED
Sp+, Sp-
Playback the Entire Message
Tf
Tr
PLAY
TDeb
TPStop
TDeb
RDY
TPSetUp
LED
Sp+, Sp-
Start Playback and Stop Playback
Figure 8.2: Playback Operation
Confidential
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Publication Release Date: March 28, 2005
Revision A0
ISD1700A SERIES
Tf
Tr
ERASE
TDeb
TDeb
TEStop
RDY
Erase with SE
Figure 8.3: Erase Operation
- 22 -
ISD1700A SERIES
9 ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS
CONDITIONS
VALUES
Junction temperature
150°C
Storage temperature range
-65°C to +150°C
Voltage applied to any pins
(VSS –0.3 V) to (VCC +0.3 V)
Power supply voltage to ground potential
-0.3 V to +7.0 V
Note: Stresses above those listed may cause permanent damage to the device. Exposure to the
absolute maximum ratings may affect device reliability and performance. Functional
operation is not implied at these conditions.
9.1 OPERATING CONDITIONS
OPERATING CONDITIONS
CONDITIONS
VALUES
Operating temperature range
Supply voltage (VCC)
Ground voltage (VSS)
Input voltage (VCC)
0°C to +50°C
[1]
+2.4 V to +5.5 V
[2]
0V
[1]
0 V to 5.5 V
Voltage applied to any pins
[1]
VCC = VCCA = VCCD= VCCP
[2]
VSS = VSSA = VSSD = VSSP1 VSSP2
(VSS –0.3 V) to (VDD +0.3 V)
Confidential
- 23 -
Publication Release Date: March 28, 2005
Revision A0
ISD1700A SERIES
10 ELECTRICAL CHARACTERISTICS
10.1 DC PARAMETERS
PARAMETER
SYMBOL
MIN
TYP [1]
MAX
UNITS
CONDITIONS
Supply Voltage
VDD
2.4
5.5
V
Input Low Voltage
VIL
VSS-0.3
0.3xVDD
V
Input High Voltage
VIH
0.7xVDD
VDD
V
Output Low Voltage
VOL
VSS-0.3
0.3xVDD
V
IOL = 4.0 mA[2]
Output High Voltage
VOH
0.7xVDD
VDD
V
IOH = -1.6 mA[2]
Record Current
IDD_Record
20
mA
Playback Current
IDD_Playback
20
mA
Erase Current
IDD_Erase
20
mA
Standby Current
ISB
1
µA
VDD = 5.5 V, T=25°C [3] [4]
Input Leakage Current
IILPD1
±1
µA
Force VDD
Input Current Low
IILPD2
-10
µA
Force VSS , others at Vcc
0.5
-3
VDD = 5.5 V, No load,
Sampling freq = 12 kHz
Preamp Input Impedance
RMIC+,RMIC-
7
kΩ
Power-up AGC
AnaIn Input Impedance
RAnaIn
42
kΩ
Power-up
MIC Differential Input
VIN1
15
300
mV
Peak-to-Peak[5]
AnaIn Input Voltage
VIN2
1
V
Gain from MIC to SP+/-
AMSP
6
40
dB
Speaker Output Load
RSPK
8
Speaker Output Power
Pout
Ω
670
mW
313
mW
117
mW
49
mW
Speaker Output Voltage
VOUT1
VDD
V
AUD
IAUD
-3.0
mA
Total Harmonic Distortion
THD
1
%
Notes:
[1]
[2]
[3]
Peak-to-Peak
VIN = 15~300 mV, AGC =
4.7 µF, VCC = 2.4V~5.5V
Across both Speaker pins
VDD = 5.5 V 1Vp-p,
VDD = 4.4 V 1 kHz sine
wave at
VDD= 3 V
AnaIn. RSPK
VDD= 2.4 V = 8 Ω.
RSPK = 8Ω (Speaker),
Typical buzzer
VDD =4.5 V, REXT= 390 Ω
15 mV p-p 1 kHz sine wave,
Cmessage weighted
Conditions: VCC = 4.5V, 8 kHz sampling frequency and TA = 25°C, unless otherwise stated.
LED output during Record operation.
VCCA, VCCD and VCCP are connected together. VSSA, VSSP1, VSSP2 and VSSD are connected together.
[4]
REC , PLAY , FT , FWD , ERASE , VOL and RESET must be at VCCD.
[5]
Balanced input signal applied between MIC+ and MIC- as shown in the applications example. Single-ended MIC+ or
MIC- input is recommended to be less than 100 mV p-p.
- 24 -
ISD1700A SERIES
10.2 AC PARAMETERS
CHARACTERISTIC
Sampling Frequency
Duration
[2]
[3]
SYMBOL
FS
MIN
TYP [1]
4
TDur
MAX
UNITS
12
kHz
Vcc=2.4 V~5.5V
sec
Vcc=2.4 V~5.5V, all Fs
Section 6.1.2
Rising time
Tr
0
100
nsec
Falling Time
Tf
0
100
nsec
Debounce Time
TDeb
(REC, PLAY, ERASE,
FWD, VOL)
RESET Pulse
TRESET
Record SetUp Time
TRSetUp
Record Stop Time
Vcc=2.4
V~5.5 V
16
msec
FS =12 kHz
24
msec
FS =8 kHz
30
msec
FS =6.4 kHz
37
msec
FS =5.3 kHz
48
msec
FS =4 kHz
µsec
Vcc=2.4 V~5.5 V
1
TRStop
CONDITIONS
0.37
sec
FS =12 kHz
0.54
sec
FS =8 kHz
0.67
sec
FS =6.4 kHz
0.80
sec
FS =5.3 kHz
1.05
sec
FS =4 kHz
0.35
sec
FS =12 kHz
0.52
sec
FS =8 kHz
0.65
sec
FS =6.4 kHz
0.77
sec
FS =5.3 kHz
1.03
sec
FS =4 kHz
Vcc=2.4
V~5.5
V, with
SEs
played
Vcc=2.4
V~5.5
V, with
SEs
played
Play SetUp Time
TPSetUp
100
msec
Vcc=2.4 V~5.5 V, all Fs
Play Stop Time
TPStop
33
msec
Vcc=2.4 V~5.5 V, all Fs
Erase Stop Time
TEStop
0.34
sec
FS =12 kHz
0.51
sec
FS =8 kHz
0.64
sec
FS =6.4 kHz
0.77
sec
FS =5.3 kHz
1.02
sec
FS =4 kHz
Vcc=2.4
V~5.5
V, with
SEs
played
AUD Ramp Up Time
TRU
4
msec
Vcc=2.4 V~5.5 V
AUD Ramp down Time
TRD
4
msec
Vcc=2.4 V~5.5 V
LED Cycle frequency
TCyc
Notes:
1
6
Hz
Playback at any FS
[1]
Typical values: VCC = 4.5 V, SF = 8 kHz and @ TA = 25°C, unless otherwise stated.
[2]
Sampling Frequency can vary as much as ±2.25 percent over the temperature and voltage ranges.
Duration can vary as much as ±2.25 percent over the commercial temperature and voltage ranges.
[3]
Confidential
- 25 -
Publication Release Date: March 28, 2005
Revision A0
ISD1700A SERIES
11 TYPICAL APPLICATION CIRCUITS
Two example circuits illustrate recording via MIC and AnaIn inputs, respectively.
show typical implementations of ISD1740A/50A/60A devices. .
These examples
Example #1:
vAlert
24
23
25
26
19
3
22
VCC
Vcc
7
6
4.7 K Ω
5
4.7 µ F
4
REC
PLAY
ERASE
LED 2
FWD
VCCD 1
VOL
VSSD 28
RESET
VCCA 21
VSSA 8
FT
TE3
TE2
TE1
NC
ISD1740A
ISD1750A
ISD1760A
10
0.1 µ F
11
0.1 µ F
9
4.7 KΩ
Rosc **
20
18
**
Sample Freq [kHz]: 12 8 6.4 4
Rosc [KΩ ]
60 80 100 160
4.7 µ F
MIC+
MIC -
1 KΩ
VCC
***
VCCA
VCCD
VCCP
VCCD
0.1 µF
*
0.1µ F
*
VCCP
*
0.1 µ F
*
VSSP2 12
15
AUD
17
RDY
27
Speaker
or Buzzer
AGC
VCC
Speaker
Q1
8050C
R6
390 Ω
ANA IN
ROSC
***
VCCA
VCCP 14
VSSP1 16 0.1µF
SP+
SP- 13
4.7 K Ω
D1
C5
0.1 µ F
Optional: based upon the applications
Recording via MIC input
Notes:
*
These capacitors may be needed in order to optimize for the best voice quality, which is also dependent
upon the layout of the PCB. Depending on system requirements, they can be 10 µF, 4.7 µF or other values.
Please refer to the ChipCorder Applications section or consult Winbond for layout advice.
** For Sampling Freq at 8 kHz, Rosc = 80 KΩ
*** It is important to have a separate path for each ground and power back to each terminal to minimize the
noise. Also, the power supplies should be decoupled as close to the device as possible.
- 26 -
ISD1700A SERIES
Example #2:
vAlert
S1
24
S2
23
S3
25
S4
26
S5
19
S6
3
S7
22
Vcc
7
6
5
R2 **
FWD
VCCD 1
VOL
VSSD 28
RESET
VCCA 21
VSSA 8
FT
TE3
TE2
TE1
NC
10
MIC+
ISD1740A
ISD1750A
ISD1760A
MIC -
9
20
VSSP2 12
15
SP+
SP- 13
D1
RDY
AGC
VCC
27
Vcc
C8 *
***
VCCA
C5
Gnd
***
VCCA
VCCD
VCCP
VCCD
C4
0.1 µF
0.1µ F
C9 *
VCCP
C10 *
C7
0.1 µ F
Speaker
or Buzzer
C11 *
VCC
Speaker
17
ANA IN
ROSC
R1
1 KΩ
VCCP 14
C6
VSSP1 16 0.1µF
AUD
18
C1
4.7 µ F
LED 2
4
11
C2
0.1 µ F
REC
PLAY
ERASE
Q1
8050C
390 Ω
0.1 µ F
Optional: based upon the applications
Recording via AnaIn input
Notes:
*
These capacitors may be needed in order to optimize for the best voice quality, which is also dependent
upon the layout of the PCB. Depending on system requirement, they can be 10 µF, 4.7 µF or other values.
Please refer to ChipCorder Applications section or consult Winbond for layout advice.
** For Sampling Freq at 8 kHz, R2 = 80 KΩ
*** It is important to have a separate path for each ground and power back to the related terminal to minimize
the noise. Also, the power supplies should be decoupled as close to the device as possible.
11.1 GOOD AUDIO DESIGN PRACTICES
To ensure the highest quality of voice reproduction, it is important to follow good audio design
practices in layout and power supply decoupling. See Application Information or links below for
details.
Good Audio Design Practices
http://www.winbond-usa.com/products/isd_products/chipcorder/applicationinfo/apin11.pdf
Single-Chip Board Layout Diagrams
http://www.winbond-usa.com/products/isd_products/chipcorder/applicationinfo/apin12.pdf
Confidential
- 27 -
Publication Release Date: March 28, 2005
Revision A0
ISD1700A SERIES
12 DIE PHYSICAL LAYOUT
ERASE
FWD
RDY
VCCD
VSSD
LED
NC
RESET
12.1 ISD1740A/50A/60A[1][2]
TE1
REC
TE2
PLAY
TE3
FT
ISD1740A
ISD1750A
ISD1760A
VSSA
VCCA
AnaIn
Rosc
MIC+
MIC-
VOL
AUD
VSSP1
SP+
VCCP
VCCP
SP-
VSSP2
AGC
Notes:
[1]
The backside of the die is internally connected to VSSA. It MUST NOT be connected to any other potential or damage may
occur.
[2]
Please contact the local Winbond Sales Offices or Representatives for details on (x,y) coordinates.
- 28 -
ISD1700A SERIES
13 ORDERING INFORMATION
Product Number Descriptor Key
ISD17xxA x
Product Family :
ISD1000 Family
Special Features Field:
Blank = vAlert disabled
Product Series :
ISD1700 Series
01
Packaged Units / Die :
X
=
Die
Duration :
40A =
40 seconds
50A =
50 seconds
60A =
60 seconds
= vAlert enabled
When ordering ISD1740A/ISD1750A/ISD1760A, please refer to the following valid ordering numbers,
which are planned to be supported in volume for this product series. Please consult the local Winbond
Sales Representatives for availability information.
Part Number
Ordering Number
No vAlert
With vAlert
ISD1740A
I1740AX
I1740AX01
ISD1750A
I1750AX
I1750AX01
ISD1760A
I1760AX
I1760AX01
For the latest product information, please access Winbond’s worldwide web site at
http://www.winbond-usa.com
Confidential
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Publication Release Date: March 28, 2005
Revision A0
ISD1700A SERIES
14 VERSION HISTORY
VERSION
DATE
A0
March 2005
DESCRIPTION
Initial version
- 30 -
ISD1700A SERIES
The contents of this document are provided only as a guide for the applications of Winbond products. Winbond makes no
representation or warranties with respect to the accuracy or completeness of the contents of this publication and
reserves the right to discontinue or make changes to specifications and product descriptions at any time without notice.
No license, whether express or implied, to any intellectual property or other right of Winbond or others is granted by this
publication. Except as set forth in Winbond's Standard Terms and Conditions of Sale, Winbond assumes no liability
whatsoever and disclaims any express or implied warranty of merchantability, fitness for a particular purpose or
infringement of any Intellectual property.
The contents of this document are provided “AS IS”, and Winbond assumes no liability whatsoever and disclaims any
express or implied warranty of merchantability, fitness for a particular purpose or infringement of any Intellectual
property. In no event, shall Winbond be liable for any damages whatsoever (including, without limitation, damages for
loss of profits, business interruption, loss of information) arising out of the use of or inability to use the contents of this
documents, even if Winbond has been advised of the possibility of such damages.
Winbond products are not designed, intended, authorized or warranted for use as components in systems or equipments
intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation
instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or
sustain life. Furthermore, Winbond products are not intended for applications wherein failure of Winbond products
could result or lead to a situation wherein personal injury, death or severe property or environmental injury could occur.
Application examples and alternative uses of any integrated circuit contained in this publication are for illustration only
and Winbond makes no representation or warranty that such applications shall be suitable for the use specified.
The 100-year retention and 10K record cycle projections are based upon accelerated reliability tests, as published in the
Winbond Reliability Report, and are neither warranted nor guaranteed by Winbond. This product incorporates
SuperFlash® technology.
This datasheet is subject to change without notice.
Information contained in this Winbond ChipCorder® datasheet supersedes all data for the ISD® ChipCorder® products
published by ISD® prior to August 1998.
This datasheet and any future addendum to this data sheet is (are) the complete and controlling ISD® ChipCorder®
product specifications. In the event any inconsistencies exist between the information in this and other product
documentation, or in the event that other product documentation contains information in addition to the information in
this, the information contained herein supersedes and governs such other information in its entirety.
Copyright© 2005, Winbond Electronics Corporation. All rights reserved. ISD® and ChipCorder® are registered
trademarks of Winbond Electronics Corporation. SuperFlash® is the trademark of Silicon Storage Technology, Inc. All
other trademarks are properties of their respective owners.
Headquarters
Winbond Electronics Corporation America
Winbond Electronics (Shanghai) Ltd.
No. 4, Creation Rd. III
Science-Based Industrial Park,
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TEL: 886-3-5770066
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FAX: 1-408-5441797
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TEL: 86-21-62365999
FAX: 86-21-62356998
Taipei Office
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9F, No. 480, Pueiguang Rd.
Neihu District
Taipei, 114 Taiwan
TEL: 886-2-81777168
FAX: 886-2-87153579
7F Daini-ueno BLDG. 3-7-18
Shinyokohama Kohokuku,
Yokohama, 222-0033
TEL: 81-45-4781881
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Kowloon, Hong Kong
TEL: 852-27513100
FAX: 852-27552064
Please note that all data and specifications are subject to change without notice.
All the trademarks of products and companies mentioned in this datasheet belong to their respective owners.
Confidential
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Publication Release Date: March 28, 2005
Revision A0
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