ISD1420 is produced by ISD Company of USAThe high quality monolithic voice recording and playback circuit is composed of an oscillator, a voice storage unit, a preamplifier, an automatic gain control circuit, an anti-interference filter and an output amplifier.
The ISD1420 voice chip may be able to solve your problem. The ISD1420 can be recorded/played in segments, up to 160 segments, and the maximum recording time is 20 seconds.
About the ISD1420 voice combination wizard board is as follows: ISD1420 voice combination wizard board is a minimal voice module, users do not need to understand the internal mechanism of the voice chip and speech synthesisWith a simple external serial port control, the ideal speech synthesis effect can be obtained directly on the speaker.
ISD voice chip features include high reliability, low power consumption, small size, easy integration and use. The ISD chip works by converting a voice signal into an analog signal, which is then sampled and compressed and stored in a built-in flash memory.
The recording content is stored in a permanent storage unit, providing zero power information storage, this unique method is based on ISD's patented Direct Analog Storage Technology (DAST TM)Real. With it, speech and audio signals are stored directly into EEPROM memory in their original analog form.
ISD1420 voice combination wizard board is a minimal voice module, the user can not need to understand the internal mechanism of the voice chip and speech synthesis, just a simple external serial port control, you can directly obtain the ideal speech synthesis effect on the speaker. The voice chip on the board can be pluggable, and ISD1420 chip is selected.
1, you will see more clearly combined with the timing diagram, the reset signal is given before sending the code, the reset pin is lowered by 5ms, the chip is reset by 20ms, and then the chip is activated by lowering the selection end of the chip by 5ms, and then the 8-bit data is sent in the low position first and the high position after (the data is set in the falling edge of the clock to latch the data along the rising edge).
2, send this command in the voice chip working state to adjust the volume, regardless of whether the voice chip is in the voice playing or voice stop state. If the address voice or other commands are triggered first, thenYou need to wait 90ms to send the volume adjustment command, otherwise it will take effect.
3, WT588D is a voice chip with a single chip microcomputer core, so it can be named WT588D series voice single chip microcomputer. WT588D series speech microcontroller is an edit-able speech chip which is developed by Guangzhou Vichuang Electronics Co., Ltd. and Taiwan Huabang. It integrates single chip and speech circuit.
4, WT588D this voice chip does not need to write, it provides a variety of interfaces can be controlled through the MCU playback, voice content and interface is through the upper computerSoftware to download and set up. WT588D has an internal SPI-FLASH, and the capacity of SPI-FLASH determines the length of the file that can be played.
5, the circuit is wrong. The VDD's 105 capacitor was replaced by a 474 capacitor. Need to modify the circuit, 105 capacitor on VDD.
1, WT588D is a voice chip with a single chip microcomputer core, so it can be named WT588D series voice single chip microcomputer. WT588D series speech microcontroller is an edit-able speech chip which is developed by Guangzhou Vichuang Electronics Co., Ltd. and Taiwan Huabang. It integrates single chip and speech circuit.
2, WT588D voice chip WT588d voice chip is an early voice chip that can be attached to FLASH, WT588D sound quality is better, flexible control characteristics, but also increase the ability to play MIDI chord function, better performance.
3, WT588D voice chip is a powerful voice chip that can be repeatedly erased and written. It is equipped with WT588DThe control mode of WT588D voice microcontroller chip can be changed at will, and the information can be downloaded to SPI-Flash.
4, WT588D is a voice chip with a single chip microcomputer core, so it can be named WT588D series voice single chip microcomputer. WT588D series voice microcontroller is an edit-able voice chip which is developed by Guangzhou Vitron Technology Co., Ltd. and Taiwan Huabang. It integrates single chip microcomputer and voice circuit.
5, use WT588D voice chip. The WT588D is a commonly used voice chip,It can be used with 51 single chip microcomputer to realize voice broadcasting function. In the design of bus station announcement system, WT588D can be used as recording module, which is controlled by 51 MCU to play different voice files.
1, the main function is one-way conduction, under the action of forward voltage, the on-resistance is very small; Under the action of reverse voltage, the on-resistance is extremely large or infinite. In addition, the diode in the circuit has voltage regulation, varactor, display, rectification,Limiting, switching, continuing, triggering and detecting functions.
2, the role of the diode in the circuit is one-way conduction. Can be used for: detection, rectification, voltage regulation, isolation of reverse electricity.
3, function: the main characteristic of the diode is one-way conductivity, that is, under the action of the forward voltage, the on-resistance is very small; Under the action of reverse voltage, the on-resistance is extremely large or infinite.
4, the circuit VD1 is a switching diode, his role is equivalent to a switch, used to switch on and off the capacitor C2. The diodes in the diode limiting circuit are connected in series to the integrated circuitBetween the A1 output signal pin and the ground, the limiting of the output signal is formed to prevent the output signal from being too large and damaging the following triode.
5, the role of the detection (also known as demodulation) diode is to use its one-way conductivity to take out the low-frequency signal or audio signal in the high-frequency or intermediate-frequency radio signal, widely used in semiconductor radio, radio recorder, television and communication equipment small signal circuit, its operating frequency is higher, processing signal amplitude is weak.
2, for digital circuits, VCC is the supply voltage of the circuit, VDD is the operating voltage of the chip (Usually VccVdd), VSS is the ground point. Some ics have both VDD and VCC pins, indicating that the device itself has a voltage conversion function.
3, the object of the voltage is different from the supply voltage of VCC to the circuit. The operating voltage of VDD is applied to the chip. The voltage of the VSS is applied inside the device. Different sources VCC is derived from the collector supply voltage and is generally used in bipolar transistors.