HT68F20 Datasheet, PDF (1/210 Pages) Holtek Semiconductor Inc – Enhanced I/O Flash Type MCU 8-Bit MCU with EEPROM

HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
Enhanced I/O Flash Type MCU 8-Bit MCU with EEPROM
Technical Document
· Application Note
- HA0075E MCU Reset and Oscillator Circuits Application Note
Features
CPU Features
· Operating Voltage:
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}
Peripheral Features
· Flash Program Memory: 1K´14 ~ 12K´16
· RAM Data Memory: 64´8 ~ 576´8
· EEPROM Memory: 32´8~256´8
· Watchdog Timer function
· Up to 50 bidirectional I/O lines
· Software controlled 4-SCOM lines LCD driver with
1/2 bias
· Multiple pin-shared external interrupts
· Multiple Timer Module for time measure, input
capture, compare match output, PWM output or
single pulse output function
· Serial Interfaces Module - SIM for SPI or I²C
· Dual Comparator functions
· Dual Time-Base functions for generation of fixed time
interrupt signals
· Low voltage reset function
· Low voltage detect function
· 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 I²C 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 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