MAX16067 datasheet(12/47 Pages) MAXIM

Part #	MAX16067

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

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Manufacturer	MAXIM [Maxim Integrated Products]

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12 _____________________________________________________________________________________

6-Channel, Flash-Configurable System Manager

with Nonvolatile Fault Registers

Monitoring Inputs While Sequencing

An enabled MON_ input can be assigned to a slot

ranging from Slot 1 to Slot 6. EN_OUT_s are always

asserted at the beginning of a slot. The supply voltages

connected to the MON_ inputs must exceed the under-

voltage threshold before the programmed fault timeout

period expires, otherwise, a fault condition occurs. Once

a MON_ input crosses the undervoltage threshold, the

monitoring for overvoltage begins. The undervoltage

and overvoltage threshold checking cannot be disabled

during power-up and power-down. See Tables 5 and

6 for the MON_ slot assignment bits. The programmed

sequence delay is then counted before moving to the

next slot.

Slot 0 does not monitor any MON_ input and does not

control any EN_OUT_. Slot 0 waits for the software

enable bit r73h[0] to be a logic-high and for the voltage

on EN to rise above 1.24V (typ) before initiating the pow-

er-up sequence and counting its own sequence delay.

Any MON_ input that suffers a fault during power-up

sequencing causes all the EN_OUT_s to turn off and

the sequencer to shut down regardless of the state of

the critical fault enables (see the Faults section). If a

MON_ input is less critical to system operation, it can

be configured as “monitoring only” (see Table 6a) for

sequencing. Monitoring for MON_ inputs assigned as

“monitoring only” begins after sequencing is complete,

and can trigger a critical fault only if specifically config-

ured to do so using the critical fault enables.

Table 3. Power-Up/Power-Down Slot Delays

Table 4. Software Enable Configurations

Code

Value

0000 0000

•

1111 1111

(

)

(

)

(

)

(

)

6

a

6

0

SEQ

t

5 10

2

16 b

5 10

2

16 0

80 s

−

=

×

+

=

×

+

=

µ

(

)

(

)

(

)

(

)

6

a

6

15

SEQ

t

5 10

2

16 b

5 10

2

16 15

5.079s

−

=

×

+

=

×

+

=

REGISTER

ADDRESS

FLASH

ADDRESS

BIT RANGE

DESCRIPTION

73h

273h

[0]

Software enable

1 = Sequencing enabled

0 = Power-down

[1]

Reserved

[2]

1 = Margin mode enabled

[3]

Reserved

[4]

Independent watchdog mode enable

1 = Watchdog timer is independent of sequencer

0 = Watchdog timer boots after sequence completes

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