General Description

The HT67FXX series of devices are Flash Memory A/D with LCD type 8-bit high performance  RISC architecture microcontrollers, designed for applications that interface directly to analog signals  and which require an LCD interface. Offering users the convenience of Flash Memory multi-programming features, these devices also include a wide range of functions and features. Other  memory includes an area of RAM Data Memory as well as an area of 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 and dual comparator functions.  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 or I2 C interface functions, two 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 HXT, LXT, ERC, HIRC and LIRC oscillator functions are provided including a  fully integrated system oscillator which requires no external components for its 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 functions along with many other  features ensure that the devices will find excellent use in applications such as electronic metering,  environmental monitoring, handheld instruments, household appliances, electronically controlled  tools, motor driving in addition to many others.