BH67F2485
AC Impedance and Electrochemical Measurement Flash MCU
The BH67F2485 is a Flash Memory A/D type 8-bit high performance RISC architecture microcontroller, specifically designed for HCT Glucose Meter with LCD display applications. Offering users the convenience of Flash Memory multi-programming features, this device also includes a wide range of functions and 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.
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 and UART interface functions, some popular interfaces which provide designers with a means of easy communication with external peripheral hardware. Protective features such as an internal Watchdog Timer, Low Voltage Reset and Low Voltage Detector coupled with excellent noise immunity and ESD protection ensure that reliable operation is maintained in hostile electrical environments.
A full choice of external, internal and high and low oscillator functions are 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 Glucose Meter applications, the device has integrated many functions required by these products. These include functions such as Internal LDO, Internal Reference Voltage generator, 12-bit D/A Converter, 24-bit Delta Sigma A/D converter, operational amplifers, bio-impedence measurement function, Over Voltage Protection, Multiplication/Division Unit, 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 HCT Glucose Meter applications which include 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 0.25us instruction cycle with 16MHz system clock at VDD= 5V
- Power down and wake-up functions to reduce power consumption
- Oscillator types
– External High Speed Crystal – HXT
– External Low Speed 32.768kHz Crystal – LXT
– Internal High Speed 4/8/12MHz RC – HIRC
– Internal Low Speed 32kHz RC – LIRC - Fully integrated internal oscillators require no external components
- Multi-mode operation: FAST, SLOW, IDLE and SLEEP
- All instructions executed in 1~3 instruction cycles
- Table read instructions
- 115 powerful instructions
- 12-level subroutine nesting
- Bit manipulation instruction
- Flash Program Memory: 48K×16
- RAM Data Memory: 4096×8
- True EEPROM Memory: 128×8
- Watchdog Timer function
- In Application Programming – IAP
- 44 bidirectional I/O lines
- Programmable I/O port source current for LED applications
- 6 pin-shared external interrupts
- Multiple Timer Modules for time measure, input capture, compare match output, PWM output or single pulse output function
– 1 Standard type 16-bit Timer Module – STM
– 3 Periodic type 10-bit Timer Modules – PTM0~PTM2 - Dual Time-Base functions for generation of fixed time interrupt signals
- Glucose Meter HCT AFE
– Internal LDO
– Internal Reference Voltage Generator
– Two 12-bit D/A Converters
– 2 internal Operational Amplifiers
– 6 external channel 24-bit resolution A/D Converter
– Bio-impedance Measurement Function - Over Voltage Protection function with interrupt
- Serial Interface Module includes SPI and I2C interfaces
- Single Serial Peripheral Interface – SPI
- Dual fully-duplex Universal Asynchronous Receiver and Transmitter Interfaces – UART0 and UART1
- 16-bit Multiplication Division Unit – MDU
- 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 or 1/4 bias
– Bias type: R type or C type
– Waveform type: type A or type B - Low Voltage Reset function
- Low Voltage Detect function
- Package types: 64/80-pin LQFP
HT8 Type MCU debug adapter
e-Link: Holtek OCDS/ICP adaptor Buy from a dealer
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Design And Development
BMHB2006 Glucose Meter MCU Development Board
Description
The BMHB2006 is a development board for Holtek Measurement Flash MCU BH67F2485. It is designed and produced by Best Health Electronics Inc.
BH67F2485 includes fully integrated functions for phase angle measurement and electrochemical measurement as well as an offset reference voltage source, making it suitable for Glucose Meters (with a wide range of HCT), Glucose and Blood Pressure two-in-one Meters, Hemoglobin Testers, Body Fat Scales and other related products.
Purchasing
BMHB2006-demo Blood Glucose Meter MCU Demo Kit
Description
Glucose is an indispensable energy source for the human body. Nevertheless, a low or high level can affect our health. A glucose meter can help us measure the glucose level. It measures glucose by the current generated by the chemical reaction between the glucose in the blood and the glucose in the test strip.
The BMHB2006-demo is a demo kit of BMHB2006 that includes a blood glucose meter, test strips, lancing device, and lancets to help you test Holtek glucose solution.
Product includes：
Blood glucose meter * 1 /Lancing device * 1 /Lancet * 50 /Test strip * 50