HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
Enhanced A/D Flash Type MCU 8-Bit MCU with EEPROM
Technical Document
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Application Note
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HA0075E MCU Reset and Oscillator Circuits Application Note
Features
CPU Features
Peripheral Features
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Operating Voltage:
Flash Program Memory: 1K´14 ~ 12K´16
f
f
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SYS= 8MHz: 2.2V~5.5V
SYS= 12MHz: 2.7V~5.5V
SYS= 20MHz: 4.5V~5.5V
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RAM Data Memory: 64´8 ~ 576´8
EEPROM Memory: 32´8~256´8
Watchdog Timer function
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Up to 0.2ms instruction cycle with 20MHz system
clock at VDD=5V
Up to 50 bidirectional I/O lines
Software controlled 4-SCOM lines LCD driver with
1/2 bias
Power down and wake-up functions to reduce power
consumption
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Multiple pin-shared external interrupts
Multiple Timer Module for time measure, input
capture, compare match output, PWM output or
single pulse output function
Five oscillators:
External Crystal - HXT
External 32.768kHz Crystal - LXT
External RC - ERC
Serial Interfaces Module - SIM for SPI or I2C
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Internal RC - HIRC
Dual Comparator functions
Internal 32kHz RC - LIRC
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Multi-mode operation: NORMAL, SLOW, IDLE and
SLEEP
Dual Time-Base functions for generation of fixed time
interrupt signals
Fully integrated internal 4MHz, 8MHz and 12MHz
oscillator requires no external components
All instructions executed in one or two instruction
cycles
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Multi-channel 12-bit resolution A/D converter
Low voltage reset function
Low voltage detect function
Wide range of available package types
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Table read instructions
63 powerful instructions
Up to 12-level subroutine nesting
Bit manipulation instruction
General Description
The HT66FXX 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 as well as
an area of EEPROM memory for storage of non-volatile
data such as serial numbers, calibration data etc.
with excellent noise immunity and ESD protection en-
sure that reliable operation is maintained in hostile elec-
trical environments.
A full choice of HXT, LXT, ERC, HIRC and LIRC oscilla-
tor functions are provided including a fully integrated
system oscillator which requires no external compo-
nents 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 mini-
mise power consumption.
Analog features include a multi-channel 12-bit A/D con-
verter and dual comparator functions. Multiple and ex-
tremely flexible Timer Modules provide timing, pulse
generation and PWM generation functions. Communi-
cation with the outside world is catered for by including
fully integrated SPI or I2C interface functions, two popu-
lar 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
The inclusion of flexible I/O programming features,
Time-Base functions along with many other features en-
sure that the devices will find excellent use in applica-
tions such as electronic metering, environmental
monitoring, handheld instruments, household appli-
ances, electronically controlled tools, motor driving in
addition to many others.
Rev. 1.00
1
November 3, 2009
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