MAX16068 datasheet(15/40 Pages) MAXIM

Part #	MAX16068

Description	6-Channel, Flash-Configurable System Manager with Nonvolatile Fault Registers

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Manufacturer	MAXIM [Maxim Integrated Products]

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______________________________________________________________________________________ 15

6-Channel, Flash-Configurable System Manager

with Nonvolatile Fault Registers

Faults

The MAX16068 monitors the input (MON_) channels and

compares the results with an overvoltage threshold and

an undervoltage threshold. Based on these conditions,

the MAX16068 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 that

protects the stored fault data from accidental erasure on

a subsequent power-up.

The MAX16068 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 9. 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 9. Fault Threshold Registers

REGISTER

ADDRESS

FLASH

ADDRESS

BIT RANGE

DESCRIPTION

48h

248h

[7:0]

Not used

49h

249h

[7:0]

MON1 overvoltage threshold

4Ah

24Ah

[7:0]

MON1 undervoltage threshold

4Bh

24Bh

[7:0]

Not used

4Ch

24Ch

[7:0]

MON2 overvoltage threshold

4Dh

24Dh

[7:0]

MON2 undervoltage threshold

4Eh

24Eh

[7:0]

Not used

4Fh

24Fh

[7:0]

MON3 overvoltage threshold

50h

250h

[7:0]

MON3 undervoltage threshold

51h

251h

[7:0]

Not used

52h

252h

[7:0]

MON4 overvoltage threshold

53h

253h

[7:0]

MON4 undervoltage threshold

54h

254h

[7:0]

Not used

55h

255h

[7:0]

MON5 overvoltage threshold

56h

256h

[7:0]

MON5 undervoltage threshold

57h

257h

[7:0]

Not used

58h

258h

[7:0]

MON6 overvoltage threshold

59h

259h

[7:0]

MON6 undervoltage threshold

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