General Description; Selection Table; In Ci�Cuit P�Og�A; Eeprom Data Me�O�Y St�Uctu - Holtek HT66F20-1 Manual

General Description

The HT66Fx0-1 and HT68Fx0-1 series are Flash Memory type with 8-bit high performance
RISC architecture microcontrollers, designed for a wide range of applications. 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 true 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 I
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.

Selection Table

Most features are common to all devices. The main features distinguishing them are Program
Memory, Data Memory capacity, TM feature, A/D function, I/O count and package tyhpes. The
following table summarises the main features of each device.
Program Data Data
Part No.
Memory Memory EEPROM
HT�8F�0-1 1K×1� �4×8 ��×8
HT�8F�0-1 �K×1� 9�×8 �4×8
HT��F�0-1 1K×1� �4×8 ��×8
HT��F�0-1 �K×1� 9�×8 �4×8
Rev. 1.40
HT66F20-1/HT66F30-1/HT68F20-1/HT68F30-1
C interface functions, two popular interfaces which provide designers with a
2
Ext. Timer
I/O A/D
Interrupt Module
10-�it CTM×1
18 � ---
10-�it STM×1
10-�it CTM×1
�� � ---
10-�it ETM×1
10-�it CTM×1
18 � 1�-�itx8
10-�it STM×1
10-�it CTM×1
�� � 1�-�itx8
10-�it ETM×1
8
Flash MCU with EEPROM
SPI/ Time
Comp. Stack Package
I C Base
2
1�DIP/�SOP/SSOP
√ � � 4
�0DIP/SOP/SSOP
1�DIP/�SOP/SSOP
�0DIP/SOP/SSOP
√ � � 4
�4SKDIP/SOP/
SSOP
1�DIP/�SOP/SSOP
√ � � 4
�0DIP/SOP/SSOP
1�DIP/�SOP/SSOP
�0DIP/SOP/SSOP
√ � � 4
�4SKDIP/SOP/
SSOP
�ove��e� ��� �01�