MAX16067 Datasheet, PDF (19/47 Pages) Maxim Integrated Products – 6-Channel, Flash-Configurable System Manager with Nonvolatile Fault Registers

6-Channel, Flash-Configurable System Manager
with Nonvolatile Fault Registers
Faults
The MAX16067 monitors the input (MON_) channels and
compares the results with an overvoltage threshold and
an undervoltage threshold. Based on these conditions,
the MAX16067 asserts various fault outputs and save
specific information about the channel conditions and
voltages into the nonvolatile flash. Once a critical fault
event occurs, the failing channel condition, ADC conver-
sions at the time of the fault, or both can be saved by
configuring the event logger. The event logger records
a single failure in the internal flash and sets a lock bit
which protects the stored fault data from accidental era-
sure on a subsequent power-up.
The MAX16067 is capable of measuring overvoltage
and undervoltage fault events. Fault conditions are
detected at the end of each ADC conversion. An over-
voltage event occurs when the voltage at a monitored
input exceeds the overvoltage threshold for that input.
An undervoltage event occurs when the voltage at a
monitored input falls below the undervoltage threshold.
Fault thresholds are set in registers r49h–r59h as shown
in Table 14. Disabled inputs are not monitored for fault
conditions and are skipped over by the input multiplexer.
Only the upper 8 bits of a conversion result are com-
pared with the programmed fault thresholds.
Table 14. Fault Threshold Registers
REGISTER
ADDRESS
48h
49h
4Ah
4Bh
4Ch
4Dh
4Eh
4Fh
50h
51h
52h
53h
54h
55h
56h
57h
58h
59h
FLASH
ADDRESS
248h
249h
24Ah
24Bh
24Ch
24Dh
24Eh
24Fh
250h
251h
252h
253h
254h
255h
256h
257h
258h
259h
BIT RANGE
DESCRIPTION
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
Not used
MON1 overvoltage threshold
MON1 undervoltage threshold
Not used
MON2 overvoltage threshold
MON2 undervoltage threshold
Not used
MON3 overvoltage threshold
MON3 undervoltage threshold
Not used
MON4 overvoltage threshold
MON4 undervoltage threshold
Not used
MON5 overvoltage threshold
MON5 undervoltage threshold
Not used
MON6 overvoltage threshold
MON6 undervoltage threshold
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