MAX16048 Maxim Integrated Products, MAX16048 Datasheet - Page 37

• Manufacturer Part Number: MAX16048
• Description: (MAX16046 / MAX16048) 12-Channel/8-Channel EEPROM-Programmable System Managers
• Manufacturer: Maxim Integrated Products

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The MAX16046/MAX16048 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 MAX16046/MAX16048
can assert various fault outputs and save specific infor-
mation 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 config-
uring the event logger. The event logger records a sin-
gle 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 MAX16046/MAX16048 are capable of measuring
overvoltage and undervoltage fault events. Fault condi-
tions are detected at the end of each ADC conversion.
Table 21. Fault Thresholds
* MAX16046 only
EEPROM ADDRESS
System Managers with Nonvolatile Fault Registers
REGISTER/
2Ah
2Bh
2Ch
2Dh
23h
24h
25h
26h
27h
28h
29h
2Eh
2Fh
30h
31h
32h
33h
34h
12-Channel/8-Channel EEPROM-Programmable
______________________________________________________________________________________
MON1 Early Warning Threshold
MON1 Overvoltage Threshold
MON1 Undervoltage Threshold
MON2 Early Warning Threshold
MON2 Overvoltage Threshold
MON2 Undervoltage Threshold
MON3 Early Warning Threshold
MON3 Overvoltage Threshold
MON3 Undervoltage Threshold
MON4 Early Warning Threshold
MON4 Overvoltage Threshold
MON4 Undervoltage Threshold
MON5 Early Warning Threshold
MON5 Overvoltage Threshold
MON5 Undervoltage Threshold
MON6 Early Warning Threshold
MON6 Overvoltage Threshold
MON6 Undervoltage Threshold
DESCRIPTION
Faults
An overvoltage event occurs when the voltage at a
monitored input exceeds the overvoltage threshold for
that input. An undervoltage fault occurs when the volt-
age at a monitored input falls below the undervoltage
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.
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.
EEPROM ADDRESS
REGISTER/
3Ah
3Bh
3Ch
3Dh
35h
36h
37h
38h
39h
3Eh
3Fh
40h
41h
42h
43h
44h
45h
46h
MON7 Early Warning Threshold
MON7 Overvoltage Threshold
MON7 Undervoltage Threshold
MON8 Early Warning Threshold
MON8 Overvoltage Threshold
MON8 Undervoltage Threshold
MON9 Early Warning Threshold*
MON9 Overvoltage Threshold*
MON9 Undervoltage Threshold*
MON10 Early Warning Threshold*
MON10 Overvoltage Threshold*
MON10 Undervoltage Threshold*
MON11 Early Warning Threshold*
MON11 Overvoltage Threshold*
MON11 Undervoltage Threshold*
MON12 Early Warning Threshold*
MON12 Overvoltage Threshold*
MON12 Undervoltage Threshold*
DESCRIPTION
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