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DS1683STR Datasheet(PDF) 5 Page - Maxim Integrated Products |
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DS1683STR Datasheet(HTML) 5 Page - Maxim Integrated Products |
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5 / 21 page  DS1683 Total-Elapsed-Time and Event Recorder with Alarm 5 Maxim Integrated Detailed Description The DS1683 is an elapsed-time recorder that tracks the accumulated time the EVENT pin has been held high as well as the number of falling edge transitions seen by the EVENT pin. The main application is to track the accumu- lated on-time and number of power cycles of a device or system. Programmable alarm limits for both the accumu- lated on-time and number of falling edges of the EVENT pin are available so that the user can be alerted when these conditions are met. The accumulated elapsed time that the EVENT pin has been held high is stored in the 4-byte Elapsed Time Counter (ETC) register. The number of times the EVENT pin sees a falling transition is stored in the 2-byte Event Counter register. The DS1683 includes password protection to prevent tampering with accumulated values, alarm limits, configuration settings, and user memory values. The ETC, ETC Alarm Limit, Event Counter, Event Counter Alarm Limit, Configuration, Password, and User Memory values are stored in shadowed EEPROM. On power-up, the values in the ETC and Event Counter are loaded into SRAM locations. When the state of the EVENT pin causes changes to the accumulated time and number of events, it is these SRAM registers that are incremented. Block Diagram ELAPSED TIME COUNTER (ETC) (REGISTERS 0Ah−0Dh) GLITCH FILTER EVENT ALARM SDA SCL ALARM LATCH ETC ALARM ENABLE ETC ALARM LIMIT (REGISTERS 12h−15h) OSCILLATOR EVENT ALARM ENABLE VCC VCC GND I2C INTERFACE EVENT ALARM LIMIT (REGISTERS 10h−11h) EVENT COUNTER (REGISTERS 08h−09h) STATUS REGISTER (REGISTER 01h) CONFIGURATION REGISTER (REGISTER 16h) USER EEPROM (REGISTERS 20h−2Fh) COMMAND REGISTER (REGISTER 00h) PASSWORD PROTECTION (REGISTERS 02h−05h) (REGISTERS 1Ah−1Dh) ALARM POLARITY DS1683 |
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