The device is a Flash Memory A/D type 8-bit high performance RISC architecture microcontroller which includes a multi-channel 24-bit Delta Sigma A/D converter.

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, user 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 with both single and differential inputs. 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, three 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.

The device also includes fully integrated high and low speed 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.

The inclusion of flexible I/O programming features, Time Base funcitons along with many other features enhance the versatility of the device to suit for applications that interface directly to analog signals and which require the low noise and high accuracy analog to digital converter.

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
• multi-mode operation: FAST, SLOW, IDLE and SLEEP
• fully integrated internal oscillators require no external components
• all instructions executed in 1~3 instruction cycles
• table read instructions
• 115 powerful instructions
• 8-level subroutine nesting
• bit manipulation instruction

Peripheral features:

• flash program memory: 8K×16
• data memory: 512×8
• true EEPROM memory: 128×8
• watchdog timer function
• In application programming function – IAP
• up to 13 bidirectional I/O lines
• programmable I/O source current for LED driver applications
• two external interrupt lines shared with I/O pins
• two timer modules for time measurement, input capture, compare match output, PWM output function or single pulse output function
• universal serial interface module – USIM for SPI, I²C or UART communication
• multi-channel 24-bit resolution Delta Sigma A/D converter
• integrated 12-bit D/A converter
• integrated OPA function
• integrated 16-bit Cyclic Redundancy Check function – CRC
• dual time base functions for generation of fixed time interrupt signals
• low voltage reset function
• low voltage detect function
• package type: 28-pin SSOP