The device is a Flash Memory type 8-bit high performance RISC architecture microcontroller designed for low cost applications. Offering users the convenience of Flash Memory multiprogramming features, the 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 Emulated 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. A single Timer Module for time measurement, compare match output or PWM output function. Communication with the outside world is catered for by including fully integrated UART interface function, the popular interface which provides designers with a means of easy communication with external peripheral hardware. In addition, a 9-bit timer is used for carrier output. Protective features such as an internal Watchdog Timer and low voltage reset function coupled with excellent noise immunity and ESD protection ensure that reliable operation is maintained in hostile electrical environments.

A full choice of internal high speed high accuracy 4MHz oscillator, external and internal low speed oscillators are provided and the two fully integrated system oscillators 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 optimize microcontroller operation and minimize power consumption.

The inclusion of flexible I/O programming features, LCD driver, Time-Base functions along with many other features ensure that the device will find excellent use in LCD remote controller and timer applications which require a high accuracy clock or a timing function.

CPU Features

• Operating voltage: fSYS =4MHz: 1.8V~5.5V
• Up to 1μs instruction cycle with 4MHz system clock at VDD =5V
• Power down and wake-up functions to reduce power consumption
• Oscillator types
  • Internal high speed 4MHz RC – HIRC
  • Internal Low speed 32kHz RC – LIRC
  • External low speed 32.768kHz Crystal – LXT
• Fully integrated internal oscillators require no external components
• Multi-mode operation: FAST, SLOW, IDLE and SLEEP
• All instructions executed in one or two instruction cycles
• Table read instructions
• 63 powerful instructions
• 6-level subroutine nesting
• Bit manipulation instruction

Peripheral Features

• Flash Program Memory: 2K×16
• Data Memory: 128×8
• Emulated EEPROM Memory: 32×16
• Watchdog Timer function
• 26 bidirectional I/O lines
• Single pin-shared external interrupt
• Single programmable carrier output – using 9-bit timer
• Single Timer Module for time measurement, compare match output or PWM output function
• Dual Time-Base functions for generation of fixed time interrupt signals
• 4 external channels 10-bit resolution A/D converter with internal reference voltage VVR
• Fully-duplex Universal Asynchronous Receiver and Transmitter Interface – UART
• LCD driver function
  • SEGs×COMs: 20×4
  • Duty type: 1/4 Duty
  • Bias level: 1/3 Bias
  • Bias type: R type
  • Waveform type: type A or type B
• Low voltage reset function – LVR
• Package types: 24-pin SOP/SSOP, 28-pin SOP/SSOP

Specification:

• max. frequency: 4MHz
• VDD: 1.8V~5.5V
• program memory: 2Kx16
• data memory: 128x8
• data EEPROM: 32x16
• stack: 6
• I/O: 26
• timer: 9-bit×1, 10-bit CTM×1
• ADC: 10-bitx4
• LCD: 20x4
• interface: UARTx1
• case: 28SOP