ZL2102ALAFTK datasheet(21/58 Pages) INTERSIL

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ZL2102

FN8440.2

November 20, 2014

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PMBus Data Formats

LINEAR-11 (L11)

L11 data format uses 5-bit two's compliment exponent (N) and 11-bit two's compliment mantissa (Y) to represent real world decimal

value (X).

Relation between real world decimal value (X), N and Y is: X = Y·2N

Linear-16 Unsigned (L16u)

L16u data format uses a fixed exponent (hardcode to N = -13) set by VOUT_MODE Command and 16-bit unsigned integer mantissa (Y)

to represent real world decimal value (X).

Relation between real world decimal value (X), N and Y is: X = Y·2-13

Bit Field (BIT)

Break down of Bit field is provided in “PMBus Command Summary” on page 19.

Custom (CUS)

Break down of Custom data format is provided in “PMBus Command Summary” on page 19. A combination of Bit field and integer are

common type of Custom data format.

ASCII (ASC)

A variable length string of text characters uses ASCII data format.

D5h PID_TAPS

Configures the control loop compensator

coefficients

R/W

CUS

Dependent upon autocomp

settings

E0h

SEQUENCE

DDC rail sequencing configuration

R/W

CUS

Pin strap setting

E2h

DDC_GROUP

sets which rail DDC IDs are monitored for fault

spreading

R/W

BIT

00h

E4h

DEVICE_ID

Returns the device identifier string

Read

ASC

<part number/die

revision/firmware revision>

E5h

MFR_IOUT_OC_FAULT_RESPONSE Configures the IOUT overcurrent fault response R/W

BIT

BFh

Restart continuously

E6h

MFR_IOUT_UC_FAULT_RESPONSE Configures the IOUT undercurrent fault

response

R/W

BIT

BFh

Restart continuously

E7h

IOUT_AVG_OC_FAULT_LIMIT

Sets the IOUT average overcurrent fault

threshold

R/W

L11

CB99h 7.2A

E8h

IOUT_AVG_UC_FAULT_LIMIT

Sets the IOUT average undercurrent fault

threshold

R/W

L11

CC67h -7.2A

E9h

MISC_CONFIG

Sets options pertaining to advanced features

R/W

BIT

00h

EAh

SNAPSHOT

32-byte read-back of parametric and status

values

Read

BIT

EBh

BLANK_PARAMS

Indicates user saved parameter values

Read

BIT

F3h

SNAPSHOT_CONTROL

Snapshot feature control command

R/W

BIT

00h

F4h

RESTORE_FACTORY

Restores device to the hard-coded default

values and pin strap definitions

Write

N/A

PMBus Command Summary (Continued)

CODE

COMMAND NAME

DESCRIPTION

TYPE

DATA

FORMAT

DEFAULT

VALUE

DEFAULT SETTING

76 54 321 0

7 6 5 4 321 0

Data Byte High

Data Byte Low

Exponent (N)

Mantissa (Y)

ZL2102ALAFTK Datasheet(PDF) 21 Page - Intersil Corporation

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