ST20P18

Ver 1.4

2/12

6/13/07

2

N

ST20P18 is a low-cost, high-performance, fully static, 8-bit

microcontroller designed with CMOS silicon gate

technology. It comes with 8-bit pipeline CPU core, SRAM,

timer, LCD driver, I/O port, PSG, RFC, CGR, OTP program

ROM and built-in dual oscillator. And also, some new

functions have been added in the ST20P18 to enhance the

performance of ST2016 for more system application.

Power bouncing during power-on is a major problem when

designing a reliable system. After the power returns to

normal level, the system may recover its original states and

keeps working correctly. Furthermore, the Power-on Timer

(PWRT) which is designed to provide a fixed delay time,

keep the part in reset for longer after power-up or low-V

reset released. With these two power management, the

system may operate under more stabile power supply.

A highly reliable Watchdog Timer(WDT) with its own low

power internal oscillator which does not require any external

components, provides protection against software lockup.

Moreover, the feature of “WDT reset CPU only” make it

possible to do the rapid system recovery after Watchdog

timer reset. And the option bit is selectable to reset or not in

WAI1 and STP mode for various application.

The Resistor Frequency Converter(RFC) which is also a

new function added in the ST20P18, can compare three

different sensors with the reference resistor separately. With

one independent 16-bits counter, the RFC can count and

stop automatically only if RFC is enabled. This make it easy

for the humidity or thermometric application.

More and more remote control applications are used today.

The ST20P18 also equips a Carrier Wave Generator(CGR)

to support this application with one digital PLL and provide

the standard clock rates output for remote control.

With these integrated functions inside, the ST20P18 single

chip microcontroller is a right solution for business

equipment and consumer applications. Such as watch,

calculator, LCD games, thermometer, hygrometer, IR

remote control and so on. ST20P18 is definitely a perfect

solution for implementation.