Vicor PI33XX-2X I2C Digital Interface Guide Instrukcja Użytkownika Pobierz pdf

vicorpower.com Rev 1.0 Cool-Power

800 735.6200 11/2012 Page 1 of 22

Cool-Power

PI33XX-2X

PI33XX-2X I

C Digital Interface Guide

Description

The PI33XX-2X I

C Digital Interface Guide provides an

overview of how to read and write to the user

accessible registers within the PI33XX-2X series. This

guide details use of the Picor I

C Digital Interface

Software Tool coupled with a USB based I

hardware interface device. Information is also

provided for I

C communication protocol using

generic tools and/or embedded hardware.

Contents

Section

Page

Program Capability………………………….…..

Fault Telemetry…………………………………….

C Communication Compatibility ………..

Interface Software Tool………………………..

USB Interface Hardware……………………….

Addressing & Register Mapping……………

Software Installation and Operation…….

Fault Telemetry Command Description..

Configuration Programming…………………

Programming Initial Conditions…………...

Configuration Examples

Sync Delay…………………………....…...…….

Enable polarity……………….………………..

Setting Kill Bit……………….……………..…..

Error Messages…………………………………….

Notes…………………………………………………...

Program Capability

The PI33XX-2X devices provide an I

C digital

interface that enables the user to program the EN

pin polarity (from high to low assertion) and input

switching frequency synchronization phase/delay.

Margining the output is also available via the I

interface.

All settings are one time programmable except for

the Vout margining which settings are stored in

volatile memory only and not retained by the device.

Fault Telemetry

The PI33XX-2X can report when a fault is detected

via the I

C interface. Reported faults include:

 Input Under Voltage Lock Out (UVLO)

 Input Over Voltage Lockout (OVLO)

 Output Voltage Over Voltage

 Over-Temperature Protection (OVP)

 Slow Current Limit

 Fast Current Limit

 VCC (internal to the SIP) Undervoltage

C Communication Compatibility

The PI33XX-2X is Hardware compatible with the NXP

Bus Specification Version 2.1 Standard Mode

(100kHz) January 2000 for all bus timing and voltage

resistors levels up to 5.5V maximum. The PI33XX-2X

is configured as an I

C slave device with no internal

bus pull up or pull down.

Interface Software Tool

The Picor Buck GUI software tool allows quick access

to the one time programmable parameters and user

adjustable parameters. The one time user

programmable parameters include enable (EN)

polarity, synchronization (SYNCI) delay, and edge

trigger. User adjustable parameters include output

margin (MRGN) level percentage and the ability to

clear the fault (FLT) register. This software also

provides the user with the ability to read and decode

fault telemetry information.

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