HT56R67/HT56R668/HT56C668
HT56R678/HT56C678/HT56R688
TinyPowerTM A/D Type with LCD 8-Bit MCU
Technical Document
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Application Note
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HA0075E MCU Reset and Oscillator Circuits Application Note
Features
Dual Serial Interfaces: SPI and I2C
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Operating voltage:
f
f
f
f
SYS=100kHz: 2.2V~5.5V
SYS=4MHz: 2.2V~5.5V
SYS=8MHz: 3.0V~5.5V
SYS=12MHz: 4.5V~5.5V
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LCD and LED driver function
4 operating modes: normal, slow, idle and sleep
8-channel 12-bit resolution A/D converter
4-channel 12-bit PWM outputs
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Operating current:
SYS=1MHz at 3V, 170mA, typ.
Low voltage reset function: 2.1V, 3.15V, 4.2V
Low voltage detect function: 2.2V, 3.3V, 4.4V
Bit manipulation instruction
f
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OTP Program Memory: 16K´16 ~ 48K´16
RAM Data Memory: 2304´8
Table read instructions
24 to 32 bidirectional I/O lines
63 powerful instructions
TinyPower technology for low power operation
Three pin-shared external interrupts lines
Up to 0.33ms instruction cycle with 12MHz system
clock at VDD=5V
Multiple programmable Timer/Event Counters
with overflow interrupt and 7-stage prescaler
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Multiple level subroutine nesting
All instructions executed in one or two machine
cycles
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External Crystal, RC and 32768 XTAL oscillators
Fully integrated RC 32kHz oscillator
Externally supplied system clock option
Watchdog Timer function
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Power down and wake-up functions to reduce power
consumption
Wide range of available package types
PFD/Buzzer for audio frequency generation
General Description
These TinyPowerTM A/D Type with LCD 8-bit high perfor-
mance RISC architecture microcontrollers are specifi-
cally, designed for applications that interface directly to
analog signals and which require an LCD or LED inter-
face. The devices include an integrated multi-channel An-
alog to Digital Converter, Pulse Width Modulation outputs
and an LCD/LED driver.
could include electronic metering, environmental moni-
toring, handheld instruments, electronically controlled
tools, motor driving in addition to many others.
The unique Holtek TinyPower technology also gives the
devices extremely low current consumption characteris-
tics, an extremely important consideration in the present
trend for low power battery powered applications. The
usual Holtek MCU features such as power down and
wake-up functions, oscillator options, programmable
frequency divider, etc. combine to ensure user applica-
tions require a minimum of external components.
With their fully integrated SPI and I2C functions, design-
ers are provided with a means of easy communication
with external peripheral hardware. The benefits of inte-
grated A/D, LCD, and PWM functions, in addition to low
power consumption, high performance, I/O flexibility
and low-cost, provides the device with the versatility for
a wide range of products in the home appliance and in-
dustrial application areas. Some of these products
Mask type devices, the HT56C668 and HT56C678, are
also available for volume production products.
Rev. 1.20
1
March 4, 2010
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