The device is a Flash Memory 8-bit high performance RISC architecture microcontroller device with Continuous Glucose Monitoring (CGM) AFE module that specifically designed for CGM applications.

For memory features, the Flash Memory offers users the convenience of Flash Memory 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 24-bit Delta Sigma A/D converter, four 12-bit D/A converters, three internal operational amplifiers and one comparator. 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 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 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 CGM 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 and operational amplifiers, etc. The inclusion of flexible I/O programming features, 16-bit MDU, 16-bit Cyclic Redundancy Check function, Time Base functions along with many other features enhance the versatility of the device to suit for CGM applications.

CPU features:

• operating voltage
  • fSYS =4MHz: 2.2V~5.5V
  • fSYS =8MHz: 2.2V~5.5V
  • fSYS =12MHz: 2.7V~5.5V
• up to 0.33μs instruction cycle with 12MHz 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
• 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
• 16-level subroutine nesting
• bit manipulation instruction

Peripheral features:

• flash program memory: 32K×16
• data memory: 2048×8
• true EEPROM memory: 2048×8
• in application programming function – IAP
• internal on-chip debug support function – OCDS
• watchdog timer function
• 9 bidirectional I/O lines
• 4 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
• dual time base functions for generation of fixed time interrupt signals
• continuous glucose monitoring AFE circuit
  • multi-channel 24-bit resolution Delta Sigma A/D Converter
  • internal reference voltage generator
  • four 12-bit D/A converters
  • 3 internal operational amplifiers
  • 1 comparator function
  • internal LDO
• serial interface module – SIM for SPI or I2C interface
• integrated multiplier/divider unit – MDU
• integrated 16-bit cyclic redundancy check function – CRC
• low voltage reset function
• package type: 24-pin QFN