HT95R44_11 Datasheet, PDF (1/8 Pages) Holtek Semiconductor Inc – I/O Type Phone 8-bit MCU with DTMF Receiver & CPT Detector

HT95R44/HT95R43
I/O Type Phone 8-bit MCU with DTMF Receiver & CPT Detector
Features
MCU Features
· MCU operating voltage without CPT Detector
f_SYS= 3.58MHz@ 2.2V~5.5V
· Program Memory: 4K´16 ~ 8K´16
· RAM Data Memory: 1152´8 ~ 2112´8
· 26 bidirectional I/Os with pull-high options
· 2 NMOS output-only lines
· 4 external interrupt input pins
· Dual 16-bit timers with interrupts
· Timer external input
· 8-level stack
· 32768Hz system oscillator
· 32768Hz to 3.58MHz frequency-up circuit
· Real time clock function
· Watchdog timer function
· PFD driver output
· DTMF generator
· DTMF receiver
· Power-down and wake-up feature for power-saving
operation
· Multiple Operating Modes: Idle mode, Sleep mode,
Green mode and normal mode
· Up to 1.117ms instruction cycle with 3.58MHz sys-
tem clock at V_DD=2.2V~5.5V
· Bit manipulation instructions
· Table read function
· 63 powerful instructions
· All instructions executed in 1 or 2 machine cycles
· Low voltage reset function
· Supported by comprehensive suite of hardware and
software tools
· 64-pin LQFP package
CPT Detector Features
· Operating voltage: 2.5V~5.5V
· Low power consumption
· CPT Band: 305~640Hz detection
· Good performance:
· -8 ~ -39 dBm at V_DD=2.5V
· 0 ~ -27 dBm at V_DD=5V
General Description
These phone MCUs are a series of 8-bit high perfor-
mance, RISC architecture microcontroller devices spe-
cially designed for telephone applications. Device
flexibility is enhanced with their internal special features
such as power-down and wake-up functions, DTMF
generator, DTMF receiver, CPT detector, PFD driver,
etc. These features combine to ensure applications re-
quire a minimum of external components and therefore
reduce overall product costs.
Having the advantages of low-power consumption,
high-performance, I/O flexibility as well as low-cost,
these devices have the versatility to suit a wide range of
application possibilities such as DTMF mode Caller ID
phone, Home Security products, deluxe feature phones,
cordless phones, fax and answering machines, etc.
The call progress tone detector is for Auto-dialing sys-
tem use. Switched capacitor technology is implemented
into the devices to obtain good band pass filter perfor-
mance characteristics for 305Hz to 640Hz call progress
tones which are dual tone multi-frequency signals.
When a CPT signal is detected it generates relative en-
velopes for the microcontroller to determine whether to
finish different kinds of CPT signal detections such as
dial tones, busy tones, ring-back tones and reorder
tones.
These devices will be ideally suited for phone products
that comply with versatile dialer specification require-
ments for different areas or countries. These devices are
fully supported by the Holtek range of fully functional de-
velopment and programming tools, providing a means for
fast and efficient product development cycles.
Rev. 1.10
1
May 30, 2011