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Overview

The device is a Flash Memory 8-bit high performance RISC architecture microcontroller device with Glucose Meter and Body Fat Scale AFE module, USB interface and LCD driver that specifically designed for USB Glucose Meter and Body Fat Scale with LCD display applications.

For memory features, the Flash Memory offers users the convenience of Flash Memory multiprogramming features. Other memory includes an area of RAM Data Memory as well as an area of true EEPROM memory for storage of non-volatile data such as serial numbers, calibration data etc. By using the In Application Programming technology, users have a convenient means to directly store their measured data in the Flash Program Memory as well as having the ability to easily update their application programs.

Analog features include a multi-channel 24-bit Delta Sigma A/D converter, two 12-bit D/A converters, two internal operational amplifiers and a fully integrated LCD driver. Multiple and extremely flexible Timer Modules provide timing, pulse generation and PWM generation functions. Communication with the outside world is catered for by including fully integrated SPI, I2C, UART and USB interface functions, four popular interfaces which provide designers with a means of easy comminucation with external peripheral hardware. Protective features such as an internal Watchdog Timer, Low Voltage Reset and Low Voltage Detect coupled with excellent noise immunity and ESD protection ensure that reliable operation is maintained in hostile electrical environments.

A full choice of external, internal high and low oscillator functions is provided including two fully integrated system oscillators which require no external components for their implementation. The ability to operate and switch dynamically between a range of operating modes using different clock sources gives users the ability to optimise microcontroller operation and minimise power consumption.

With regard to USB Glucose Meter and Body Fat Scale applications, the device has integrated many of the functions required by these products. These include functions such as Internal Reference Voltage generator, Internal LDO, 24-bit Delta Sigma A/D converter, 12-bit D/A Converters, operational amplifiers, LCD driver and USB interface, etc. The inclusion of flexible I/O programming features, 16-bit Cyclic Redundancy Check function, Multiplier/Divider Unit, Time Base functions along with many other features enhance the versatility of the device to suit for USB Glucose Meter and Body Fat Scale applications which require an LCD display.

Features

High-Precision Bio-Sensing Analog Front-End

  • - Integrated 24-bit Delta-Sigma ADC
  • - Internal programmable OPAs and electrochemical measurement circuits
  • - Supports AC impedance, phase angle, and bio-signal sensing applications

Low Power Consumption and Wide Operating Voltage

  • - Operating voltage: 2.2V ~ 5.5V
  • - Supports selectable clock sources and power-down modes
  • - Ideal for battery-powered portable devices

Highly Integrated Memory and Interfaces

  • - Built-in Flash, RAM, and EEPROM
  • - Communication interfaces: I²C / SPI / UART
  • - Supports In-Application Programming (IAP) for firmware updates

Enhanced System Safety and Reliability

  • - Built-in Watchdog, LVR / LVD
  • - Strong noise immunity and ESD protection
  • - Flexible internal/external clock switching

Documents

BH66F2495v180

Contains electrical characteristics, register descriptions, and system architecture. Please refer to it before solution design and software development.

BH67F2495 Datasheet

LQFP80

Includes package dimensions, pad layout, and assembly requirements. Please use it for PCB layout and process evaluation.

LQFP64

Includes package dimensions, pad layout, and assembly requirements. Please use it for PCB layout and process evaluation.

BMHB2012:BH67F2495 BGM Dev Board Resources

Resources

BMHB2012:BH67F2495 BGM Dev Board Resources

The BMHB2012 is the development board of BH67F2495. With it, you can evaluate the functionality of the MCU. The BH67F2495 is suitable for applications of USB glucose meters, glucose and blood pressure two-in-one meters and so on.

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Quick Start

High-Precision Blood Glucose Meter (BGM) Demo — BH67F2495_EVM_BGM User Guide

Platform: BH67F2495 (single-chip Flash MCU with built-in 24-bit ΣΔ AFE)

BH67F2495_EVM_BGM is the demo resource pack for the BH67F2495 evaluation board (V1.2), positioned as a high-precision Blood Glucose Meter (BGM) reference design. The same driver tree ships additional application examples for BIA (bio-impedance), BodyScales (body-composition), and EIS (electrochemical impedance spectroscopy), covering the main use cases of the BH67F2495 AFE. The companion EISVision.exe host tool pairs with the EIS example for impedance sweep and live data visualization.

1. Directory Layout
BH67F2495_EVM_BGM/
├── 1.doc/              # Public docs (MCU datasheet, EVM user guide, package drawings)
├── 2.code/             # Firmware (low-level drivers + applications + examples)
│   └── BH67F2495_Driver/
├── 3.board/            # Board-level hardware pack (schematic / PCB / BOM zip)
├── 4.AP/               # Host-side software (EIS measurement tool)
└── README.md           # This guide
2. 1.doc — Public Documents and References

PDF resources: MCU datasheet.

FileDescription
BH67F2495v170.pdfBH67F2495 datasheet V1.70
simBH67F2495v170.pdfBH67F2495 emulator (SIM) datasheet V1.70
3. 2.code — Firmware

2.code/BH67F2495_Driver/ contains the BH67F2495 low-level drivers, application modules, and example projects.

3.1 Directory Overview
BH67F2495_Driver/
├── application/        # Application layer: Bia, BodyScales, Eis, Iap_Isp
├── board/              # Board configuration: BoardCfg.h
├── driver/             # Low-level drivers: Adc24, Afe, AfePower, ATM/PTM/STM, Eeprom,
│                       #   Gpio, I2c/I2cMaster, Iap, IntPin, Lcd, LedScan7x6,
│                       #   Oscillators, Ram, Rtc, Spi, Uart, Wdt, Lvd, Lvr, etc.
└── example/            # Example projects: one HT-IDE project (.pjtx) per peripheral,
                        #   plus application-level demos (Bia4, BodyScales, Eis, Adc24 verification)
3.2 Headline Application Examples
ApplicationProject LocationDescription
BGM (Blood Glucose Meter)application/Eis.* + example/Eis/High-precision glucose meter reference, based on EIS impedance method
BIA (Bio-Impedance Analysis)application/Bia.h + example/Bia4/4-electrode bio-impedance measurement
BodyScalesapplication/BodyScales.h + example/BodyScales/Body-composition scale demo
Adc24 verificationexample/Adc24_Verify/24-bit ΣΔ ADC channel accuracy verification
Iap_Ispapplication/Iap_Isp.*In-application / in-system programming
3.3 Build and Programming
  • Projects use Holtek's format (.pjtx / .OPT); build with Holtek HT-IDE3000 (Windows, "HT8" toolchain).
  • Compile flags are baked into .pjtx: -Wall -Os -muse-mdu, link /OptimizeParam=16 /Stack /LInsVarOpt.
  • Flash via Holtek e-Link or e-WriterPro; target chip is BH67F2495.
  • Build artifacts go to each project's .output/.
3.4 Code Style

The driver directory ships a .clang-format: LLVM base, 4-space indent, no column limit, opening braces on a new line for functions and control statements, aligned consecutive assignments and macros. Include order: paired-name header → <system>"stdbool.h""driver|application|board/…" → others. Do not reshuffle includes by hand — run clang-format.

4. 3.board — Board-Level and PCB Files
FileDescription
BH67F2495_EVM _BGM_V1.2.zipEVM V1.2 hardware pack (schematic + PCB + BOM)
6. Quick Start Guide
  1. Read the docs — Start with 1.doc/BH67F2495v170.pdf for the BH67F2495 datasheet and AFE specifications.
  2. Install the toolchain — Install Holtek HT-IDE3000 (Windows).
  3. Pick an example — For BGM customers, open example/Eis/Eis.pjtx first; impedance / BIA → example/Bia4/; body composition → example/BodyScales/.
  4. Build and flash — Build in HT-IDE3000, flash to BH67F2495 via e-Link / e-WriterPro.
7. Version & Contact
  • EVM hardware revision: V1.2 (see 3.board/BH67F2495_EVM _BGM_V1.2.zip).
  • MCU datasheet: V1.70 (see 1.doc/BH67F2495v170.pdf).
  • Technical support: tony@e-besthealth.com (project contact)
  • Business inquiries: info@e-besthealth.com
  • Website: https://www.e-besthealth.com
  • Address: Office 301, Building 10, Xinzhu Garden, No.4 Xinzhu Road, Songshan Lake, Dongguan, Guangdong, China
  • Phone: +86-769-26261311
8. Disclaimer

The materials in this repository — including hardware schematics, PCB files, source code, and documents — are provided solely for customer reference and evaluation. Before using these materials in product design, mass production, or commercial deployment, customers are responsible for conducting full functional testing, reliability validation, and regulatory certification. BestHealth Electronics Inc. (悠健电子(东莞)有限公司) shall not be liable for any direct or indirect losses arising from the customer's use of these materials in production, sale, or operation — including but not limited to yield issues, field failures, product recalls, or end-customer claims. These materials are provided "as is" without warranty of any kind, express or implied.

9. Intellectual Property

All materials in this repository (including but not limited to hardware design files, source code, documents, trademarks, and logos) are the intellectual property of BestHealth Electronics Inc. (悠健电子(东莞)有限公司), protected by applicable laws. Customers are granted only the right to use these materials for reference and evaluation. Reverse engineering, resale, redistribution, or unauthorized public release is prohibited without prior written consent.

© 2026 BestHealth Electronics Inc. (悠健电子(东莞)有限公司) All Rights Reserved.

This README is a directory-level user guide for fast customer navigation. Refer to the individual PDFs and source code for protocol and register details.

Complete Package

BMHB2012 Complete Resource Package

BH67F2495 EVM BGM V1.2 Board Design

BH67F2495 Driver Source Code

🔬 Development Stage

Tools for development and debugging

💻 Software

IDE-3000

(IDE Software)

The HT-IDE3000 is a simulation software specially developed for HOLTEK 8-bit MCUs. When used together with OCDS EV chip, it will implement a series of operations such as single step, full speed, breakpoint setting, RAM monitor, etc.

Documents

IDE-3000

The HT-IDE3000 is a simulation software specially developed for HOLTEK 8-bit MCUs. When used together with OCDS EV chip, it will implement a series of operations such as single step, full speed, breakpoint setting, RAM monitor, etc.

HT-IDE3000 User’s Guide

🔧 Hardware

e-LinkPro2

(Debug Hardware)

The e-LinkPro2 function is compatible with the e-Link and which is an online debug adaptor for Holtek's new generation of OCDS architecture Flash MCUs. Together with the HT-IDE3000 software it allows users to program and debug programs on their target boards. The e-LinkPro2 also provides an ICP function for Flash MCUs. When connected to a PC and when used together with the HOPE3000 software the e-LinkPro2 can also be used as a low volume engineering programmer for HT8 Flash MCUs.

Documents

Holtek e-Link for 8-bit MCU OCDS User’s Guide

🏭 Small-scale Production

Tools for small batch programming

💻 Software

IDE-3000

(IDE Software)

The HT-IDE3000 is a simulation software specially developed for HOLTEK 8-bit MCUs. When used together with OCDS EV chip, it will implement a series of operations such as single step, full speed, breakpoint setting, RAM monitor, etc.

Documents

IDE-3000

The HT-IDE3000 is a simulation software specially developed for HOLTEK 8-bit MCUs. When used together with OCDS EV chip, it will implement a series of operations such as single step, full speed, breakpoint setting, RAM monitor, etc.

HT-IDE3000 User’s Guide

HOPE5000

(Programming Software)

The HOPE5000 is a software designed by Holtek for programming MCUs. The software is connected to the writer via a USB cable to transmit the related programming data.

Documents

HOPE5000

The HOPE5000 is a software designed by Holtek for programming MCUs. The software is connected to the writer via a USB cable to transmit the related programming data.

HOPE5000 User guide

🔧 Hardware

e-Socket

(Programming Hardware)

The e-Socket is a socket which is used together with e-WriterPro. MCUs with the same package types can use the same e-Socket for programming. It is not necessary to purchase individual programming adaptors for different MCUs. The e-Socket is designed with a programming counter which enables the e-WriterPro to remind users when to replace the e-Socket with a new one after a certain amount of times. This function is provided to maintain high programming quality.

e-WriterPro2

(Programming Hardware)

The e-WriterPro2 is an upgraded version programmer of the e-WriterPro, which is fully compatible with the previous version, and it can be used not only as a programming tool for all of Holtek’s OTP and Flash devices during development stage but can also be used for small to medium volume production purposes.

🏢 Mass Production

Tools for high-volume manufacturing

💻 Software

IDE-3000

(IDE Software)

The HT-IDE3000 is a simulation software specially developed for HOLTEK 8-bit MCUs. When used together with OCDS EV chip, it will implement a series of operations such as single step, full speed, breakpoint setting, RAM monitor, etc.

Documents

IDE-3000

The HT-IDE3000 is a simulation software specially developed for HOLTEK 8-bit MCUs. When used together with OCDS EV chip, it will implement a series of operations such as single step, full speed, breakpoint setting, RAM monitor, etc.

HT-IDE3000 User’s Guide

🔧 Hardware

GangWriter00-8

(Programming Hardware)

The product is an upgraded gang programmer of Gang-Writer32-8 and Gang-Writer8-8. It is composed of a development board and two programming modules and supports programming both Holtek 8-bit and 32-bit MCUs. Each programming module includes 4 programming interfaces, and one development board can connect up to 4 programming modules. This allows the product to program up to 16 MCUs simultaneously, with support for parallel programming across 2, 4, 6, 8, 12, and 16 sites.

e-Socket

(Programming Hardware)

The e-Socket is a socket which is used together with e-WriterPro. MCUs with the same package types can use the same e-Socket for programming. It is not necessary to purchase individual programming adaptors for different MCUs. The e-Socket is designed with a programming counter which enables the e-WriterPro to remind users when to replace the e-Socket with a new one after a certain amount of times. This function is provided to maintain high programming quality.

e-WriterPro2

(Programming Hardware)

The e-WriterPro2 is an upgraded version programmer of the e-WriterPro, which is fully compatible with the previous version, and it can be used not only as a programming tool for all of Holtek’s OTP and Flash devices during development stage but can also be used for small to medium volume production purposes.

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