BH67F2472
Glucose Meter Flash MCU with LCD & OCDS
The device is a Flash Memory 8-bit high performance RISC architecture microcontroller device with Glucose meter AFE module and LCD driver that specifically designed for Glucose Meter with LCD display applications.
For memory features, the Flash Memory offers users the convenience of multi-programming 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 12-bit A/D converter, a 12-bit D/A converter and two internal operational amplifiers. 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, UART and I2C interface functions, three popular interfaces which provide designers with a means of easy comminucation with external peripheral hardware. Protective features such as an internal Watchdog Timer and Low Voltage Reset 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 oscillators is provided including 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 Glucose Meter applications, the device has integrated many of the functions required by these products. These include functions such as Internal Reference Voltage generator, 12-bit D/A Converter, LCD driver function, etc. The inclusion of flexible I/O programming features, Time-Base functions along with many other features ensure that the device will be highly capable of providing MCU solutions for Glucose Meter applications which require an LCD display.
Product Details
- Operating Voltage
♦ fSYS=4MHz: 2.2V~5.5V
♦ fSYS=8MHz: 2.2V~5.5V
♦ fSYS=12MHz: 2.7V~5.5V
♦ fSYS=16MHz: 3.3V~5.5V - Up to 0.25μs instruction cycle with 16MHz system clock at VDD=5V
- Power down and wake-up functions to reduce power consumption
- Oscillator Types
♦ Internal High Speed 4/8/12MHz RC – HIRC
♦ Internal Low Speed 32kHz RC – LIRC
♦ External High Speed Crystal – HXT
♦ External Low Speed 32.768kHz Crystal – LXT - Fully integrated internal oscillators require no external components
- Multi-mode operation: FAST, SLOW, IDLE and SLEEP
- All instructions executed in one to three instruction cycles
- Table read instructions
- 115 powerful instructions
- 16-level subroutine nesting
- Bit manipulation instruction
- Flash Program Memory: 32K×16
- Data Memory: 2048×8
- True EEPROM Memory: 2048×8
- In Application Programming function – IAP
- On-Chip Debug Support function – OCDS
- Watchdog Timer function
- 58 bidirectional I/O lines
- Four external interrupt lines shared with I/O pins
- Multiple Timer Modules for time measure, compare match output, PWM output function or single pulse output function
- Dual Time-Base functions for generation of fixed time interrupt signals
- Glucose Meter AFE circuitry
♦ 6 external channel 12-bit resolution A/D Converter
♦ Internal Reference Voltage Generator
♦ 12-bit D/A Converter
♦ Two Operational Amplifiers - LCD Driver function
♦ SEGs × COMs: 36×4, 34×6 or 32×8
♦ Duty type: 1/4 duty, 1/6 duty or 1/8 duty
♦ Bias level: 1/3 bias
♦ Bias type: C type
♦ Waveform type: type A or type B - Two Universial Serial Interface Modules – USIM for SPI, I2C or UART communication
- Single Independent Serial Peripheral Interface – SPI
- Low voltage reset function
- Package types: 64/80-pin LQFP
e-Link: Holtek OCDS/ICP adaptor Buy from a dealer
HT8 Flash MCU Production Writer e-WriterPro Buy from a dealerDesign And Development
BMHB2007 Glucose Meter MCU Development Board
Description
The BMHB2007 is a development board designed for the blood glucose meter MCU, BH67F2472. It’s suitable for three-in-one measurement applications (blood glucose, uric acid, and cholesterol), as well as an LCD function for connecting an external LCD display.
The BH67F2472 integrates a blood glucose measurement circuit, and a low-temperature drift reference voltage, and provides multiple communication interfaces. It can be connected to Bluetooth modules as well. Furthermore, the display brightness of the capacitive constant voltage LCD driver does not change with battery voltage.