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MAX16046A Datasheet(PDF) 40 Page - Maxim Integrated Products |
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MAX16046A Datasheet(HTML) 40 Page - Maxim Integrated Products |
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40 / 71 page  12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers 40 ______________________________________________________________________________________ Faults The MAX16046A/MAX16048A monitor the input (MON_) channels and compare the results with an overvoltage threshold, an undervoltage threshold, and a selectable overvoltage or undervoltage early warning threshold. Based on these conditions, the MAX16046A/ MAX16048A can assert various fault outputs and save specific information about the channel conditions and voltages into the nonvolatile EEPROM. Once a critical fault event occurs, the failing channel condition, ADC conversions at the time of the fault, or both may be saved by configuring the event logger. The event log- ger records a single failure in the internal EEPROM and sets a lock bit which protects the stored fault data from accidental erasure on a subsequent power-up. The MAX16046A/MAX16048A are capable of measur- ing overvoltage and undervoltage fault events. Fault conditions are detected at the end of each ADC con- version. An overvoltage event occurs when the voltage at a monitored input exceeds the overvoltage threshold for that input. An undervoltage fault occurs when the voltage at a monitored input falls below the undervolt- age threshold. Fault thresholds are set in registers r23h to r46h as shown in Table 21. Disabled inputs are not monitored for fault conditions and are skipped over by the input multiplexer. Only the upper 8 bits of a conver- sion result are compared with the programmed fault thresholds. Inputs not assigned to a sequencing slot are not monitored for fault conditions but are still recorded in the ADC results registers. The general-purpose inputs/outputs (GPIO1–GPIO6) can be configured as Any_Fault outputs or dedicated FAULT1 and FAULT2 outputs to indicate fault condi- tions. These fault outputs are not masked by the critical fault enable bits shown in Table 23. See the General- Purpose Inputs/Outputs section for more information on configuring GPIOs as fault outputs. Table 21. Fault Thresholds REGISTER/ EEPROM ADDRESS DESCRIPTION 23h MON1 Early Warning Threshold 24h MON1 Overvoltage Threshold 25h MON1 Undervoltage Threshold 26h MON2 Early Warning Threshold 27h MON2 Overvoltage Threshold 28h MON2 Undervoltage Threshold 29h MON3 Early Warning Threshold 2Ah MON3 Overvoltage Threshold 2Bh MON3 Undervoltage Threshold 2Ch MON4 Early Warning Threshold 2Dh MON4 Overvoltage Threshold 2Eh MON4 Undervoltage Threshold 2Fh MON5 Early Warning Threshold 30h MON5 Overvoltage Threshold 31h MON5 Undervoltage Threshold 32h MON6 Early Warning Threshold 33h MON6 Overvoltage Threshold 34h MON6 Undervoltage Threshold REGISTER/ EEPROM ADDRESS DESCRIPTION 35h MON7 Early Warning Threshold 36h MON7 Overvoltage Threshold 37h MON7 Undervoltage Threshold 38h MON8 Early Warning Threshold 39h MON8 Overvoltage Threshold 3Ah MON8 Undervoltage Threshold 3Bh MON9 Early Warning Threshold* 3Ch MON9 Overvoltage Threshold* 3Dh MON9 Undervoltage Threshold* 3Eh MON10 Early Warning Threshold* 3Fh MON10 Overvoltage Threshold* 40h MON10 Undervoltage Threshold* 41h MON11 Early Warning Threshold* 42h MON11 Overvoltage Threshold* 43h MON11 Undervoltage Threshold* 44h MON12 Early Warning Threshold* 45h MON12 Overvoltage Threshold* 46h MON12 Undervoltage Threshold* * MAX16046A only |
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