Cpu Supervisor With 64kbit Spi Eeprom Corporation

These devices X5643 X5645 combine four popular functions, Power- on Reset Control, Watchdog Timer Supply Voltage Supervision, and Block Lock Protect Serial EEPROM Memory in one package. This combination lowers sys- tem cost, reduces board space requirements, and increases reliability. Applying power to the device activates the power-on reset circuit which holds RESET/RESET active for a period of time. This allows the power supply and oscilla- tor to stabilize before the processor CAN execute code. The Watchdog Timer provides an independent protection mechanism for Microcontrollers When the microcon- troller fails to restart a Timer within a selectable time out interval, the device activates the RESET/RESET signal. The user selects the interval from three preset values. Once selected, the interval does not change, even after cycling the power. By Intersil Corporation