HT68F03M/HT68F04M/HT66F03M/HT66F04M --
1.5V Battery Flash Type 8-Bit MCU with EEPROM & DC-DC Converter

General Description
This series of devices are Flash Memory 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, among which is their internal DC-DC Converter allowing low voltage operation. In addition to their Flash Program Memory there is also area of RAM Data Memory and 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 comparator functions. 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.
An extensive choice of oscillator functions is 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 devices also include flexible I/O programming features Time-Base functions and a range of other features.
The internal PFM type step-up DC-DC Converter allows the MCU to be powered from low voltage sources, and has the advantages of high efficiency and low ripple. With a fixed and accurate 3.0V output voltage and extremely low 0.7V start-up voltage, these MCU devices will be especially suitable for battery-powered applications, portable handheld equipment etc.

Features

MCU Features

Operating voltage: 3.0V (typ.)
Power down and wake-up functions to reduce power consumption
Five oscillators:
External High Speed Xtal
External 32.768kHz Xtal
External RC
Internal High Speed -- no ext. components
Internal 32kHz -- no ext. components
Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP
Fully integrated internal 4MHz, 8MHz and 12MHz
All instructions executed in one or two instruction cycles
Table read instructions
63 powerful instructions
Up to 8 subroutine nesting levels
Bit manipulation instruction
Flash Program Memory: 1Kx14 ~ 2Kx15
RAM Data Memory: 64x8 ~ 96x8
EEPROM Memory: 64x8
Watchdog Timer function
Up to 8 bidirectional I/O lines
External interrupt line shared with I/O pin
Multiple Timer Module for time measure, input capture, compare match output, PWM output or single pulse output functions
Comparator function
Dual Time-Base functions for generation of fixed time interrupt signal
Low voltage reset function
Low voltage detect function
Multi-channel 12-bit resolution A/D converter

DC-DC converter Features
3.0V ± 2.5% output voltage
0.7V start-up voltage
Output current up to 100mA
High efficiency: 85% (typ.) at VOUT=3V