The devices are Flash Memory A/D type 8-bit high performance RISC architecture microcontrollers which include 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, 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 with both single and differential inputs 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 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.

A full choice of external, internal high and low oscillators 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.

The inclusion of flexible I/O programming features, Time-Base funcitons along with many other features enhance the versatility of the devices to suit for applications that interface directly to analog signals which require a 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
  • ♦ fSYS =16MHz: 3.3V~5.5V
• up to 0.25μs instruction cycle with 16MHz system clock
• power down and wake-up functions to reduce power consumption
• oscillator types
  • ♦ external High Speed Crystal – HXT
  • ♦ internal High Speed 4/8/12MHz RC – HIRC
  • ♦ external Low Speed 32.768kHz Crystal – LXT
  • ♦ 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
• 16-level subroutine nesting
• bit manipulation instruction

Peripheral features:

• flash program memory: 16K×16~32K×16
• data memory: 1024×8~2048×8
• true EEPROM memory: 1024×8~2048×8
• in application programming function – IAP
• internal on-chip debug support function – OCDS, only available for BH67F5275 and BH67V5265
• watchdog timer function
• up to 57 bidirectional I/O lines
• programmable I/O source current for LED applications
• two 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
  • ♦ three 10-bit periodic type TMs – PTM0~PTM2
  • ♦ one 10-bit audio type TM – ATM, only available for BH67F5275
• serial interface module – SIM includes SPI and I²C interfaces
• single serial peripheral interface – SPI
• fully-duplex / half-duplex universal asynchronous receiver and transmitter interface – UART
• dual time-base functions for generation of fixed time interrupt signals
• 3 differential or 6 single-end external channel 24-bit resolution Delta Sigma A/D converter
• LCD driver function
  • ♦ SEGs×COMs: 44×4, 42×6 or 40×8 for BH67F5275
  • ♦ 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
• integrated multiplier/divider unit – MDU
• integrated 16-bit cyclic redundancy check function – CRC
• low voltage reset function
• low voltage detect function
• package type: 32QFN