3

PI6CFGL601B

RevA

01/16/15

PI6CFGL601B

6-Output Low Power PCIE Gen 1-2-3 Clock Generator

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Serial Data Interface (SMBus)

This part is a slave only device that supports blocks read and block write protocol using a single 7-bit address and read/write bit as

shown below.

Read and write block transfers can be stopped after any complete byte transfer by issuing STOP.

Address Assignment

A6

A5

A4

A3

A2

A1

A0

W/R

1

1

0

1

0

0

1

0/1

Data Protocol

(Write)

1 bit

8 bits

1

8 bits

1

8 bits

1

8 bits

1

8 bits

1

1 bit

Start bit Slave Addr: D2 Ack Register offset Ack Byte Count=N Ack Data Byte 0 Ack

…

Data

Byte N-1 Ack Stop bit

(Read)

1 bit

8 bits

1

8 bits

1

1

8 bits

1

8 bits

1 8 bits 1

8 bits

1

1

bit

Start bit

Slave

Addr: D2 Ack

Register

offset

Ack Repeat

start

Slave

Addr: D3 Ack

Byte

Count=N Ack

Data

Byte 0 Ack …

Data

Byte

N-1

NOT

Ack

Stop

bit

Note:

1.Register offset for indicating the starting register for indexed block write and indexed block read. Byte Count in write mode cannot be 0.

15-0018