LTC3871 datasheet(13/24 Pages) LINER

13 / 24 page

LTC7106

Rev A

For more information www.analog.com

Figure 1. Timing Diagram

OPERATION

SDA

SCL

tHD(STA)

tHD(DAT)

tSU(STA)

tSU(STO)

tSU(DAT)

tLOW

tHD(SDA)

tSP

tBUF

START

CONDITION

STOP

CONDITION

REPEATED START

CONDITION

START

CONDITION

tHIGH

7106 F01

SLAVE ADDRESS

DATA BYTE

Wr A

A P

7106 F02

START CONDITION

REPEATED START CONDITION

READ (BIT VALUE OF 1)

WRITE (BIT VALUE OF 0)

SHOWN UNDER A FIELD INDICATES THAT THAT

FIELD IS REQUIRED TO HAVE THE VALUE OF x

ACKNOWLEDGE (THIS BIT POSITION MAY BE 0

FOR AN ACK OR 1 FOR A NACK)

STOP CONDITION

PEC PACKET ERROR CODE

MASTER TO SLAVE

SLAVE TO MASTER

CONTINUATION OF PROTOCOL

1 1

...

SLAVE ADDRESS

COMMAND CODE

DATA BYTE

Wr A

A P

7106 F03

1 1

SLAVE ADDRESS Wr A

A P

7106 F04

1 1

COMMAND CODE

SLAVE ADDRESS

COMMAND CODE

SLAVE ADDRESS

Wr A

A P

7106 F05

DATA BYTE LOW

DATA BYTE HIGH

1 1

SLAVE ADDRESS

COMMAND CODE

SLAVE ADDRESS

Wr A

A Sr

7106 F06

DATA BYTE

1 1

Figure 2. PMBus Packet Protocol Diagram Element Key

Figure 3. Write Byte Protocol

Figure 4. Send Byte Protocol

Figure 5. Read Word Protocol

Figure 6. Read Byte Protocol

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