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.

CPU Features

• operating voltage
  • ♦ VDD (MCU):
    • – fSYS =6MHz: 2.2V~5.5V
    • – fSYS =12MHz: 2.7V~5.5V
    • – fSYS =16MHz: 3.3V~5.5V
  • ♦ VDD (USB mode):
    • – fSYS =6MHz/12MHz/16MHz: 3.6V~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
  • ♦ external high speed crystal – HXT
  • ♦ internal high speed 12MHz RC – HIRC
  • ♦ external low speed 32.768kHz Crystal – LXT
  • ♦ 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
• 109 powerful instructions
• 16-level subroutine nesting
• bit manipulation instruction

Peripheral features:

• flash program memory: 64K×16
• data memory: 4096×8
• true EEPROM memory: 4096×8
• in application programming function – IAP
• in system programing function – ISP
• internal on-chip debug support function – OCDS
• watchdog timer function
• 49 bidirectional I/O lines
• 6 external interrupt lines shared with I/O pins
• multiple Timer Modules for time measure, input capture, compare match output, PWM output
• function or single pulse output function
  • ♦ one 16-bit standard type TM – STM
  • ♦ two 10-bit periodic type TMs – PTM0~PTM1
  • ♦ one 10-bit audio type TM – ATM
• dual time base functions for generation of fixed time interrupt signals
• glucose eter and body fat scale AFE
  • ♦ multi-channel 24-bit resolution Delta Sigma A/D Converter
  • ♦ internal LDO
  • ♦ internal reference voltage generator
  • ♦ two 12-bit D/A converters
  • ♦ 2 internal operational amplifiers
  • ♦ bio-impedance analysis function
• LCD driver function
  • ♦ SEGs×COMs: 36×4, 34×6, 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
• USB interface
  • ♦ USB 2.0 Full Speed compatible
  • ♦ 4 endpoints supported including endpoint 0
  • ♦ all endpoints except endpoint 0 can support interrupt and bulk transfer
  • ♦ all endpoints except endpoint 0 have a fixed FIFO size of 16, 32 and 64 bytes respectively
  • ♦ endpoint 0 support control transfer
  • ♦ endpoint 0 has 8 byte FIFO
  • ♦ support 3.3V LDO and internal UDP 1.5kΩ pull-up resistor
  • ♦ internal 12MHz RC oscillator with ±0.25% accuracy for all USB modes
• serial interface module – SIM for SPI or I2C interface
• fully-duplex / half-duplex universal asynchronous receiver and transmitter interface – UART
• integrated multiplier/divider unit – MDU
• integrated 16-bit cyclic redundancy check function – CRC
• low voltage reset function
• low voltage detect function
• package type: 80-pin LQFP