9DBV0531AKILFT datasheet(10/17 Pages) IDT

Part #	9DBV0531AKILFT

Description	5-output 1.8V HCSL Fanout Buffer

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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5-OUTPUT 1.8V HCSL FANOUT BUFFER

10

REVISION E 05/23/16

9DBV0531 DATASHEET

General SMBus Serial Interface Information

How to Write

• Controller (host) sends a start bit

• Controller (host) sends the write address

• IDT clock will acknowledge

• Controller (host) sends the beginning byte location = N

• IDT clock will acknowledge

• Controller (host) sends the byte count = X

• IDT clock will acknowledge

• Controller (host) starts sending Byte N through Byte

N+X-1

• IDT clock will acknowledge each byte one at a time

• Controller (host) sends a Stop bit

Note: SMBus Address is Latched on SADR pin.

How to Read

• Controller (host) will send a start bit

• Controller (host) sends the write address

• IDT clock will acknowledge

• Controller (host) sends the beginning byte location = N

• IDT clock will acknowledge

• Controller (host) will send a separate start bit

• Controller (host) sends the read address

• IDT clock will acknowledge

• IDT clock will send the data byte count = X

• IDT clock sends Byte N+X-1

• IDT clock sends Byte 0 through Byte X (if X(H) was

written to Byte 8)

• Controller (host) will need to acknowledge each byte

• Controller (host) will send a not acknowledge bit

• Controller (host) will send a stop bit

Index Block Write Operation

Controller (Host)

IDT (Slave/Receiver)

TstarT bit

Slave Address

WR

WRite

ACK

Beginning Byte = N

ACK

Data Byte Count = X

ACK

Beginning Byte N

ACK

O

OO

O

Byte N + X - 1

ACK

PstoP bit

Index Block Read Operation

Controller (Host)

IDT (Slave/Receiver)

TstarT bit

Slave Address

WR

WRite

ACK

Beginning Byte = N

ACK

RT

Repeat starT

Slave Address

RD

ReaD

ACK

Data Byte Count=X

ACK

Beginning Byte N

ACK

O

OO

O

Byte N + X - 1

N

Not acknowledge

PstoP bit

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9DBV0531AKILFT Datasheet(PDF) 10 Page - Integrated Device Technology

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