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| DS1310/DS1311 PRELIMINARY DS1310/DS1311 Super Socket FEATURES PIN ASSIGNMENT 1 40 * Built-in CMOS circuitry adds nonvolatile SRAM and real time clock to existing microcontroller-based designs * Requires no printed circuit board modification * 4K bits of NV SRAM for more than 10 years in the absence of VCC * Optional timekeeper for event dating and activity scheduling whose VCC and ground are pins 40 and 20, respectively * Accepts any microcontroller in standard 40-pin DIP * Parasitic serial interface to built-in circuitry via a single microcontroller I/O pin * Special wake-up pattern for invoking added functionality 20 21 * Proven gas-tight socket contacts PIN DESCRIPTION All pins pass through except for: Pin 20 Pin 40 - - Ground VCC Any pin except for 20 and 40 can be user-configured for added functionality by closing the appropriate shorting pads of the Super Socket with solder. DESCRIPTION DS131x Super Sockets are 40-pin, 0.6-inch wide DIP sockets with built-in CMOS circuitry that adds new functions to existing microcontroller-based systems. The circuits within the Super Socket are special versions of a 1-wire peripheral integrated circuit designed to support parasitic communication on a single I/O pin of the microcontroller. The Super Socket accepts any 40-pin, single-chip microcontroller with VCC and ground on pins 40 and 20, respectively. When mated with a microcontroller, the Super Socket provides access to its built-in, 1-wire chip by means of a wake-up pattern that is sent via a single bidirectional I/O pin on the microcontroller. As a result, the chip resides as a parasite on an I/O pin without encumbering the pin's normal function. The DS131x is an effective upgrade option for previously-designed, single-chip systems and requires only slight software modification. 022798 1/1 |
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