BH45F68
Glucose Meter Flash MCU
The BH45F68 is a Flash Memory 8-bit high performance RISC architecture microcontroller device that specifically designed for Glucose Meter pplications.
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.
Analog features include a multi-channel 12-bit A/D converter, an 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, I2C and UART interface functions, these 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 and internal high and low oscillator functions are 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 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 - Up to 0.33us instruction cycle with 12MHz system clock at VDD= 5V
- Power down and wake-up functions to reduce power consumption
- Four Oscillators
– Internal High Speed 4/8/12MHz RC Oscillator – HIRC
– External Low Speed 32.768kHz Crystal – LXT
– Internal Low Speed 32kHz RC Oscillator – 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: 32K×16
- RAM Data Memory: 1024×8
- True EEPROM Memory: 64×8
- Watchdog Timer function
- In Application Programming – IAP
- 56 bidirectional I/O lines
- Four external interrupt lines shared with I/O pins
- Multiple Timer Modules for time measurement, input capture, compare match output, PWM output function or single pulse output function
- Glucose Meter AFE integrated circuitry:
– 6 external channel 12-bit resolution A/D Converter
– Internal Reference Voltage Generator
– A 12-bit D/A Converter
– Two Operational Amplifiers - Universial Serial Interface Module – USIM for SPI, I2C or UART communication
- Dual Time-Base functions for generation of fixed time interrupt signals
- LCD driver function
– SEGs×COMs: (Up to) 32×4, 30×6 or 28×8
– 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 - Low voltage reset function – LVR
- Low voltage detect function – LVD
- Package types: 64/80-pin LQFP
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