HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type MCU 8-Bit MCU with EEPROM
Technical Document
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Features
CPU Features
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Operating Voltage:
Peripheral Features
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Flash Program Memory: 1K´14 ~ 12K´16
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RAM Data Memory: 64´8 ~ 576´8
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EEPROM Memory: 32´8~256´8
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Watchdog Timer function
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Up to 50 bidirectional I/O lines
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Software controlled 4-SCOM lines LCD driver with
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f
SYS
= 8MHz: 2.2V~5.5V
f
SYS
= 12MHz: 2.7V~5.5V
f
SYS
= 20MHz: 4.5V~5.5V
Up to 0.2ms instruction cycle with 20MHz system
clock at V
DD
=5V
Power down and wake-up functions to reduce power
consumption
Five oscillators:
External Crystal -- HXT
External 32.768kHz Crystal -- LXT
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 12-level subroutine nesting
Bit manipulation instruction
1/2 bias
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Multiple pin-shared external interrupts
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Multiple Timer Module for time measure, input
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capture, compare match output, PWM output or
single pulse output function
Serial Interfaces Module - SIM for SPI or I
2
C
Dual Comparator functions
Dual Time-Base functions for generation of fixed time
interrupt signals
Low voltage reset function
Low voltage detect function
asynchronous communication
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Optional peripheral -- UART module for fully duplex
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Wide range of available package types
General Description
The HT68FXX series of devices are Flash Memory I/O
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.
Multiple and extremely flexible Timer Modules provide
timing, pulse generation and PWM generation func-
tions. Analog features include dual comparator func-
tions. Communication with the outside world is catered
for by including fully integrated SPI or I
2
C interface func-
tions, two popular interfaces which provide designers
with a means of easy communication with external pe-
ripheral hardware. Protective features such as an inter-
nal 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 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.
The UART module is contained in the HT68FUx0 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.
1
February 1, 2010
Rev. 1.10
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
