HT95R22 Datasheet, PDF (1/52 Pages) Holtek Semiconductor Inc – I/O Type Phone 8-bit MCU

HT95R22
I/O Type Phone 8-bit MCU
Technical Document
· Application Note
- HA0075E MCU Reset and Oscillator Circuits Application Note
Features
· Operating voltage at f_SYS= 3.58MHz: 2.2V~5.5V
· 4K´16 OTP type Program Memory
· 576´8 Data Memory
· 18 bidirectional I/Os with pull-high options
· 2 NMOS output-only lines
· External interrupt input
· Dual 16-bit timers with interrupts
· Timer external input
· 8-level stack
· 32768Hz system oscillator
· 32768Hz to 3.58MHz frequency-up PLL circuit
· Real time clock function
· Watchdog timer function
· DTMF generator
· Power-down and wake-up feature for power-saving
operation: Idle mode, Sleep mode, Green mode and
normal mode
· Up to 1.117ms instruction cycle with 3.58MHz system
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
· Supported by comprehensive suite of hardware and
software tools
· 28-pin SOP package
General Description
The HT95R22 MCU is an 8-bit high performance, RISC
architecture microcontroller device specially designed
for telephone applications. Device flexibility is en-
hanced with its internal special features such as
power-down and wake-up functions, DTMF generator,
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, the
device has the versatility to suit a wide range of applica-
tion possibilities such as deluxe feature phones, cord-
less phones, fax and answering machines, etc.
The device is best suited for phone products that com-
ply 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
January 6, 2009