HT95R45 Datasheet, PDF (1/76 Pages) Holtek Semiconductor Inc – Phone 8-Bit MCU with DTMF Receiver & CPT

HT95R45
Phone 8-Bit MCU with DTMF Receiver & CPT
Features
· Operating voltage:
f_SYS=3.58MHz: 2.2V~5.5V
f_SYS=7.16MHz: 3.0V~5.5V
f_SYS=10.74MHz: 3.0V~5.5V
f_SYS=14.32MHz: 4.5V~5.5V
· Program Memory: 16K´16
· 2112´8 Data Memory
· 42 bidirectional I/Os with pull-high options
· 2 NMOS output-only lines
· External interrupt input
· Three 16-bit timers with interrupts
· Timer external input
· 8-level stack
· 32768Hz system oscillator
· 32768Hz up to 14.32MHz frequency-up circuit
· Real time clock function
· Watchdog timer function
· PFD driver output
· Serial Interfaces Module: SIM for SPI or I²C
· Internal DTMF generator
· Internal DTMF receiver
· 12-bit Audio DAC output
· Power-down and wake-up feature for power-saving
operation: Idle mode, Sleep mode, Green mode
and Normal mode
· Up to 0.28ms instruction cycle with 14.32MHz
system clock at V_DD=4.5V~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
· Internal Call Progress Tone (CPT) detector
· 64/80-pin LQFP package
General Description
The phone MCU is a 8-bit high performance, RISC ar-
chitecture microcontroller devices specially designed
for telephone applications. Devices flexibility are en-
hanced with their internal special features such as
power-down and wake-up functions, DTMF generator,
DTMF receiver, CPT detector, PFD driver, SPI and I²C
interface, audio DAC output, etc. These features com-
bine to ensure applications require a minimum of exter-
nal 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 capacitors technology is imple-
mented into the chip to get good performance
characteristics of band pass filter in the range of 305Hz
to 640Hz call progress tone which is dual tone
multi-frequency signal. When it detected CPT signal
then it generates relative envelopes for external
microcontroller decision to finish different kinds of CPT
signal detection such as dial tone, busy tone, ring-back
tone and reorder tone.
The device will be ideally suited for phone products that
comply with versatile dialer specification requirements
for different areas or countries. The device is fully sup-
ported by the Holtek range of fully functional develop-
ment and programming tools, providing a means for fast
and efficient product development cycles.
Rev. 1.00
1
March 12, 2010