Cpu Supervisor With 64kbit Spi Eeprom CorporationThese 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
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