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PDF HT95R44 Data sheet ( Hoja de datos )
| Número de pieza | HT95R44 | |
| Descripción | I/O Type Phone 8-bit MCU | |
| Fabricantes | Holtek Semiconductor | |
| Logotipo |  |
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www.DataSheet4U.com
HT95R44/HT95R43
I/O Type Phone 8-bit MCU with DTMF Receiver & CPT Detector
Features
MCU Features
· MCU operating voltage without CPT Detector
fSYS= 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 VDD=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 VDD=2.5V
· 0 ~ -27 dBm at VDD=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. 1.00
1 March 31, 2010
1 page  
www.DataSheet4U.com
HT95R43/HT95R44
Functional Description
As these devices contain multiple internal chips, for a
detailed functional description, users must refer to the
relevant individual datasheets for both the MCU and the
CPT Detector. The following table shows which individ-
ual devices are inside each package.
Device
HT95R43
HT95R44
MCU
HT95R33
HT95R34
CPT Detector
HT9020B
HT9020B
Multi-chip Internal Devices
Although most of the functional description material will
be located in the individual datasheets, there are some
special considerations which need to be taken into ac-
count when using multi-chip devices. These points will
be mentioned in the hardware and software consider-
ation sections.
Multi-chip Hardware Considerations
As these single-package multi-chip devices are com-
posed of an individual MCU and CPT Detector chips,
using them together requires the user to take care of
some special points.
· Absolute Maximum Ratings
The Absolute Maximum Ratings for the two individual
chips must be checked for discrepancies and the nec-
essary care taken in device handling and usage.
· Power Supply
Examination of the block diagram will reveal that the
CPT Detector ground and power supply pin, VSS4
and VDD4, are not internally connected to the MCU
ground and power supply pins, VSS and VDD. For this
reason these two pins must be connected externally.
When calculating the total current consumption of the
device, the internal DC specifications of the two inter-
nal chips must be consulted and the individual cur-
rents added together.
When calculating the total current consumption of the
device, the internal DC specifications of the two inter-
nal chips must be consulted and the individual cur-
rents added together.
· Power Down and Wake up
Please note that if the MCU is powered down or
placed into a low power mode to conserve power, that
the CPT Detector will continue running and will con-
sume a certain amount of power. The CPT Detector
can of course be powered down by pulling its CPTEN
pin high.
· Functional Pins
Examination of the block diagram will reveal that the
CPT Detector pins, CPTEN, CPTX1, CPTX2,
CPTENV, CPTVREF, CPTSIN, VDD4, VSS4, have no
internal connection to the MCU pins. For this reason
these pins must be controlled and connected exter-
nally.
Multi-chip Programming Considerations
As there are no internal signal connections between the
two internal chips there are no real programming con-
siderations for these devices. It is only necessary to
realise that if the MCU is switched into any of its low
power modes or executes the HALT instruction by the
application program to reduce power consumption, that
the CPT Detector will continue operating and therefore
contribute to the overall power consumption. The CPT
Detector can only be powered-down manually using its
CPTEN pin.
Rev. 1.00
5 March 31, 2010
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet HT95R44.PDF ] | |
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