This document provides information about the WTV-SR Voice Recording Module. It can operate in parallel mode and record up to 1600 seconds of audio using a 64MB SPI flash chip. It supports recording and playback of audio files via buttons and address pins. Key features include 7 operating modes, MIC/LINE recording, USB upload/download, 10kHz/14kHz sampling, and volume control.

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ATK-VCR
WTV-SR Voice Recording Module
Overview
WTV-SR Voice Recording Module this is configure for parallel mode operation
only. You can also include wave files to direct corresponding address. Min
duration of voice recording is up to 1600 seconds.
Features
 Up to 7 kinds of operating modes : MP3 mode, one to one key mode, parallel
mode, one record one play key mode , Audio-book mode, two-wire serial
mode and three-wire serial mode
 Support MIC and LINE-IN recording.
 Support plug-in 64M bit SPI-FLASH, recording time up to 1600 seconds
 Support upload and download voice via USB;
 Support playback the high-quality voice which downloaded from computer
 Can record up to 252 segments voice (including fixed voice);
 With function of power-down data protection
 Support audio recording at 10KHz or 14KHZ sample rate
 Adopt a separate document management system, recording without debris,
more reasonable distribution of SPI-FLASH space;
 Support key and MCU control;
 8-level controllable volume;
 Operating voltage: DC2.6 ~ 3.6V, sleep current :10uA (typical).
 Module package: DIP28, can be defined, reference value: 18.30mm *
36.00mm
 WTV-SR using SPI-FLASH store voice messages, the current version
supports the largest of 64M. Specific as following table, the table data is from
audio recording at 10KHz sample rate (unit: sec)

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Pins description
WTV-SR Voice Recording Module

3. 3
Working Modes
WTV-SR Working Modes : MP3 mode , Pushbutton one on one mode , Parallel
mode , One record one play key mode , e-book mode, two-wire serial mode and
three-wire serial mode.
This module is configure for Parallel mode
Parallel mode descriptions
In the Parallel Port Mode, Module can record 32 Group of voice A0, A1, A2, A3,
A4 for setting addresses. Record button for Record ,PL for Play, Erase button for
Erase (Keep Low 15ms erase current address voice file, Keep Low 3 seconds erase
all the voice files)
10K sampling rate.
 1 ~ 32Mbit recording using the same address will be automatically covered
by the original voice.
 64Mbit SPI-Flash.
using the same address to record are not automatically covered by the original
voice, require customers to delete in advance; When exists the same name there
will be long "beep" sound (314mS), maintain a low level 30ms to delete the current
Add voice, for 3 seconds to delete all voice files. Delete files are not allowed to
power down or reset, if you encounter power down or reset, All content of Flash
will be deleted.
14K sampling rate
using the same address to record are not automatically covered by the original
voice, require customers to delete in advance; When exists the same name there
will be long "beep" sound (314ms), maintain a low level 30ms to delete the current
Add voice, for 3 seconds to Erase all voice files. Erase files are not allowed to
power down or reset , if you encounter power down or reset, All content of Flash
will be deleted .
Note: When use 64M SPI-Flash ,The time to delete recordings required longer, the
duration related to different types of SPI-Flash , for example,The limit of using

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Winbond 64MSPI-Flash to remove a long recording time is 600 seconds, Erase all
(format) need about 20 seconds.
Record Button: Low pulse trigger, button image stabilization time is 30ms, the
level keep, recording.
PL PIN : Low pulse trigger, button image stabilization time of 30ms, when
received pulse play current address voice file
Erase Button: Low pulse trigger, button image stabilization time is 30ms, when
received pulse delete the current paragraph, Keep Low 3 seconds erase all the
voice files.
A0-A4: address I / O ports, When Record Button begin to record ,according to
these I / O combinations using a different file name recording.
Addresses Configuration
Control port of the A0, A1, A2, A3, A4 can be combined, different port states
represent different audio files. Address, file name, I / O corresponding
relationships shown in the table

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In this Mode ,the recorded file name will be start from letter “C”. C000 means
first Group of voice file

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Timing Waveform

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Specifications
Parameter Min Typ Max Units
Working Voltage 4.5 5 5.2 Volts
Recording time 1600 sec
Pin Diagram
Pin Pin Name
Pin Name
+5V Power Supply Regulated 5V supply input
GND Ground Ground level of power supply
A0 to A4 Address Address Pin for storage location
PL Play Play voice when it Low
Erase Button Erase all the data
Record Button Push it till recording is done

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Note: This module is configure for Parallel mode