To develop Holtek's 8bit MCU firmware is easy and inexpensive. For our latest generation MCUs, you simply need to purchase two hardware, e-Link and OCDS Chip, to do it. Holtek offers free and highly Integrated development Environment software, IDE-3000, for all series of Holtek 8-bit MCUs. This IDE supports both C and Assembly language. Click Quick Start tab to see how easy it is for the whole design process.

e-Link is an online debug adapter for Holtek's new generation of OCDS architecture 8-bit Flash MCUs. Together with the HT-IDE3000 software it allows users to program and debug programs on their target boards. * e-Link also provides an ICP function for 8-bit Flash MCUs. When connected to a PC and when used together with the HOPE3000 software the e-Link can also be used as a low volume engineering programmer for HT8 Flash MCUs. * e-Link is not able to support offline programming and is not recommended for volume device programming.

OCDS chip is equivalent to its Flash MCU including debug circuits for debug purpose. The part number usually has a "V" instead of "F" which represents Flash in Hotek's 8-bt MCUs. Ex: HT66V0185 28SSOP is the OCDS chip of HT66F0185 28SSOP.

Holtek Easy DEV development board series make design easier before building your own target board. It has an onboard OCDS chip and a connecting header to e-Link for code debugging and MCU programming. * DEV28SSOP195 (HT66F0195) * DEV28SSOP185 (HT66F0185) * DEV20NSOP019 (HT66F019) * DEV16NSOP002 (HT66F002)

e-WriterPro is a programming tool designed for all of Holtek's 8-bit OTP and Flash devices. It can be used not only as a programming tool during the development stage but can also be used for small to medium volume production purpose.

Optional purchase: e-FPCB If your target device is an 8-pin or 10-pin MCU, the OCDS only comes at 16pin minimum so it is recommended using this flexible PCB to transform a 16pin package type into an 8-pin or 10-pin package type.