MAX16067 datasheet(22/47 Pages) MAXIM

Part #	MAX16067

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

PDF	47 Pages

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Manufacturer	MAXIM [Maxim Integrated Products]

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22 _____________________________________________________________________________________

6-Channel, Flash-Configurable System Manager

with Nonvolatile Fault Registers

Table 18. Nonvolatile Fault Log Registers

Autoretry/Latch Mode

The MAX16067 can be configured for one of two fault

management methods: autoretry or latch-on-fault. Set

r74h[4:3] to ‘00’ to select the latch-on-fault mode. In

this configuration, EN_OUT_s deassert after a critical

fault event. The device does not reinitiate the power-up

sequence until EN is toggled or the software enable bit

is toggled. See the Enable Input (EN) section for more

information on setting the software enable bit.

Set r74h[4:3] to a value other than ‘00’ to select autoretry

mode (see Table 19). In this configuration, the device

shuts down after a critical fault event then restarts fol-

lowing a configurable delay. Use r74h[2:0] to select an

autoretry delay from 20ms to 1.6s. See Table 19 for more

information on setting the autoretry delay.

When fault information is stored in flash (see the Critical

Faults section) and autoretry mode is selected, set an

autoretry delay greater than the time required for the

storing operation. When fault information is stored in

flash and latch-on-fault mode is chosen, toggle EN or

reset the software enable bit only after the completion of

the storing operation. When saving information about the

failed lines only, ensure a delay of at least 12ms before

the restart procedure. Otherwise, ensure a minimum

153ms timeout, to ensure that ADC conversions are

completed and values are stored correctly in flash.

FLASH

ADDRESS

BIT RANGE

DESCRIPTION

200h

[3:0]

Sequencer state where the fault has happened (see Table 1 for state codes).

Fault has happened during power-up if bit [3] = 0 and during power-down if [3] = 1.

Bits [2:0] indicate the slot number.

[7:4]

Not used

201h

[0]

Fault log triggered on MON1 falling below its undervoltage threshold

[1]

Fault log triggered on MON2 falling below its undervoltage threshold

[2]

Fault log triggered on MON3 falling below its undervoltage threshold

[3]

Fault log triggered on MON4 falling below its undervoltage threshold

[4]

Fault log triggered on MON5 falling below its undervoltage threshold

[5]

Fault log triggered on MON6 falling below its undervoltage threshold

[7:6]

Not used

202h

[0]

Fault log triggered on MON1 exceeding its overvoltage threshold

[1]

Fault log triggered on MON2 exceeding its overvoltage threshold

[2]

Fault log triggered on MON3 exceeding its overvoltage threshold

[3]

Fault log triggered on MON4 exceeding its overvoltage threshold

[4]

Fault log triggered on MON5 exceeding its overvoltage threshold

[5]

Fault log triggered on MON6 exceeding its overvoltage threshold

[6]

Fault log triggered on EXTFAULT

[7]

Not used

203h

[7:0]

MON1 ADC output (8 MSBs)

204h

[7:0]

MON2 ADC output (8 MSBs)

205h

[7:0]

MON3 ADC output (8 MSBs)

206h

[7:0]

MON4 ADC output (8 MSBs)

207h

[7:0]

MON5 ADC output (8 MSBs)

208h

[7:0]

MON6 ADC output (8 MSBs)

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