DS1846 NV's three potentiometers, memory and MicroMonitor™ consist of two 10K? ? 100-bit linear potentiometer, one 100K 256-bit linear tap potentiometer;? ? 256 bytes of EEPROM memory; MicroMonitor. This device provides an ideal way to set bias voltages and currents in control applications using minimal circuitry. EEPROM memory allows the user to store a specific system configuration or calibration data or device and provides control of potentiometer wiper settings. Any type of user information can reside in the first 248 bytes of memory (00H F7H). The next three bytes of memory (F8H to FAH) are reserved for the last five addresses of potentiometer settings and EEPROM memory (FBH to FFh). These reserved and potentiometer registers should not be used to store data. The EEPROM is via an industry standard 2-wire bus. The interface I/O pins consist of SDA and SCL. The wiper posts to the DS1846, as well as the EEPROM data, can be hardware write protected, using the WP input pin. MicroMonitor is an accurate temperature compensated reference and comparator that monitors certain microprocessor critical conditions. When the detection input detects an out-of-tolerance (VCC) condition, a non-maskable interrupt is generated. As the voltage on the device drops, the internal powerfail generates a signal that can be used to reset the processor. When VCC returns, the reset signal remains active in the TRST state for the shortest time at a tolerated level, allowing the power supply and microprocessor to stabilize. MicroMonitor also functions as a push button reset control. Active TRST minimum pulse width is generated internally on the debounced button input.