HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
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
f
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
Multi-mode operation: NORMAL, SLOW, IDLE and
SLEEP
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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
Optional peripheral -- UART module for fully duplex
asynchronous communication
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Table read instructions
63 powerful instructions
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Wide range of available package types
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.
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. Communica-
tion with the outside world is catered for by including fully
integrated SPI or I2C interface functions, two popular inter-
faces which provide designers with a means of easy com-
munication 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.
The UART module is contained in the HT66FUx0 series of
devices. It can support the applications such as data com-
munication networks between microcontrollers, low-cost
data links between PCs and peripheral devices, portable
and battery operated device communication, etc.
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. 1.20
1
June 4, 2010
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