General Description

The HT66F1x series of devices are Flash Memory A/D type 8-bit high performance RISC architecture microcontrollers. 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 for application program data storage.

Analog feature includes a multi-channel 12-bit A/D converter. Multiple and extremely flexible Timer Modules provide timing, pulse generation and PWM generation functions. 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.

Features

CPU Features

· Operating Voltage:

fSYS= 8MHz: 2.2V~5.5V

fSYS= 12MHz: 2.7V~5.5V

fSYS= 20MHz: 4.5V~5.5V

· Up to 0.2ms instruction cycle with 20MHz system clock at VDD=5V

· Power down and wake-up functions to reduce power consumption

· Four oscillators:

External Crystal -- HXT

External RC -- ERC

Internal RC -- HIRC

Internal 32kHz RC -- LIRC

· Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP

· Fully integrated internal 4MHz, 8MHz and 12MHz oscillator requires no external components

· All instructions executed in one or two instruction cycles

· Table read instructions

· 63 powerful instructions

· Up to 8-level subroutine nesting

· Bit manipulation instruction

Peripheral Features

· Flash Program Memory: 1K´14 ~ 4K´15

· RAM Data Memory: 64´8 ~ 192´8

· Watchdog Timer function

· Up to 26 bidirectional I/O lines

· Software controlled 4-SCOM lines LCD driver with 1/2 bias

· Multiple pin-shared external interrupts

· Multiple Timer Module for time measure, input capture, compare match output, PWM output or single pulse output function

· Single Time-Base function for generation of fixed time interrupt signal

· 4 channels 12-bit A/D converter

· Low voltage reset function

· Low voltage detect function

· Wide range of available package types