HT56R22/HT56R23/HT56R24/HT56R25/HT56R26
TinyPowerTM A/D Type 8-Bit OTP MCU with DAC
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:
OTP Program Memory: 2K´14 ~ 32K´16
f
f
f
f
SYS= 32768Hz: 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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RAM Data Memory: 128´8 ~ 2304´8 Bits
Watchdog Timer function
Up to 50 bidirectional I/O lines
8 channel 12-bit ADC
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Up to 0.33ms instruction cycle with 12MHz system
clock at VDD= 5V
Up to 4 channel 12-bit PWM
Software controlled 4-SCOM lines LCD driver with
1/2 bias
Idle/Sleep mode and wake-up functions to reduce
power consumption
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Multiple pin-shared external interrupts
Up to three 8-bit programmable Timer/Event Counter
with overflow interrupt and prescaler
Oscillator types:
External 32768Hz Crystal -- LXT
External RC -- ERC
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Up to one 16-bit programmable Timer/Event Counter
with overflow interrupt
Serial Interfaces Module - SIM for SPI or I2C
Internal 4/8/12MHz RC -- HIRC
External high frequency crystal -- HXT
Internal 32kHz RC -- LIRC
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Time-Base functions
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Four operational modes: Normal, Slow, Idle, Sleep
Low voltage reset function
Fully integrated internal 4MHz, 8MHz and 12MHz os-
cillator requires no external components
Low voltage detect function
PFD/Buzzer for audio frequency generation
12-bit Audio DAC output
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All instructions executed in one or two instruction
cycles
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Wide range of available package types
Table read instructions
63 powerful instructions
Up to 12-level subroutine nesting
Bit manipulation instruction
General Description
These TinyPowerTM A/D Type 8-bit high performance
RISC architecture microcontrollers are specifically, de-
signed for applications that interface directly to analog sig-
nals. The devices include an integrated multi-channel
Analog to Digital Converter, Pulse Width Modulation and
and DAC outputs.
dustrial application areas. Some of these products
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, PWM and DAC 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-
Rev. 1.00
1
March 11, 2010
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