1. Power supply: 5V
2. Directly drive an 8Ω/0.5W speaker
3. Voice Workshop
   - Edits voices and sentences easily
   - Supports to upload mono WAV files
   - Compression format: PCM / u-law / ADPCM
   - Programs or generates files for secondary development
4. Programming tool:
   - e-LinkPro2/e-Link + Voice Workshop
   - e-Writer32 + Adaptor + HOPE3200 software
5. Operating mode: peripheral mode, professional mode
6. Peripheral mode：one-wire, two-wire 1, two-wire 2, SPI, I²C, direct mode (button mode)
7. Professional mode: flexible, self-defined control mode

The product can play both voice and sentences. Voice refers to various sounds, such as human voices, music, or pre-recorded audio, while sentences are composed of voices, and you can set silence between two voices.

In the Voice MCU Workshop, you can choose whether you require secondary development. If the secondary development option is selected, you will enter Professional Mode; otherwise, you will enter Peripheral Mode. Peripheral mode supports 6 control modes, including one-wire, two-wire 1, two-wire 2, SPI, I²C, direct mode (button mode). Users can select control mode via the on-board jumper. It is necessary to power cycle the device after changing the control mode.
★ Refer to the “Control Mode Selection” section in the user’s guide for more details.

The product not only supports to program the on-board MCU, but also can program HT68RV03x series MCU via the on-board sockets.
We have pre-soldered an on-board socket for the 8-pin SOP package MCU at the factory. If programming a 16-pin NSOP package MCU is required, you will need to solder an additional on-board socket for it. Alternatively, you can program 16-pin NSOP package MCUs of the HT68RV03x series using the e-Writer32 and the ESKT3216NSOP_68RV03X adapter.

1. MCU: Holtek HT68RV03x, Voice Peripheral OTP MCU, including datasheet, package information, etc.
2. Development platform: Voice MCU Workshop, including software, user's guide, etc.

   Voice Workshop is the development platform for Holtek voice MCUs, using a simple graphical user interface and allowing users to develop their projects easily.