ISL68229IRAZ datasheet(39/107 Pages) RENESAS

39 / 107 page

ISL68229, ISL68239

9. PMBus Command Summary

R16DS0006EU0101 Rev.1.01

Page 39 of 106

Jul 21, 2022

9.1

PMBus Use Guidelines

All commands can be read at any time.

9.2

PMBus Data Formats

9.2.1 Direct

The Direct data format is a 2-byte binary integer.

9.2.2 Linear 16 Unsigned (L16U)

The L16u data format uses a fixed exponent (hard-coded to N = -9h) and a 16-bit unsigned integer mantissa (Y)

to represent the real world decimal value (X). The relation between the real world decimal value (X), N, and Y is:

X = Y·2-9.

9.2.3 Linear 16 Signed (L16S)

The L16S data format uses a fixed exponent (hard-coded to N = -9h) and a 16-bit signed integer mantissa (Y) to

represent the real world decimal value (X). The relation between the real world decimal value (X), N, and Y is:

X = Y·2-9.

9.2.4 Linear 11 (L11)

The L11 data format uses 5-bit two’s complement exponent (N) and 11-bit two’s complement mantissa (Y) to

represent the real world decimal value (X).

The relation between the real world decimal value (X), N, and Y is: X = Y·2N.

9.2.5 Bit Field (Bit)

A description of Bit Field is provided in the PMBus Command Detail.

9.2.6 Custom (Cus)

Custom format

ECh

SLOW_OC_FILT_COUNT (ECh)

Configures the slow OC filter

R/W

Bit

0606h

Filter = 10.7µs,

Delay = 1024µs

F0h

LOOPCFG (F0h)

Defines rail operating

configuration

R/W

Bit

102031F6h See detail

F2h

RESTORE_CFG (F2h)

Identifies configuration to be

restored from NVM

R/W

Bit

00h

Figure 30. Linear 11 Data Format

Code

Command Name

Description

Type

Data

Format

Default

Value

Default Setting

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