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A Product Line of

Diodes Incorporated

PI6CB332016A

November 2024

© 2024 Copyright Diodes Incorporated. All Rights Reserved.

PI6CB332016A

Document Number DS45931 Rev 3-2

www.diodes.com

SMBus Serial Data Interface

The PI6CB332016A is a slave only device that supports block and byte protocol using a single 7-bit address and read/write bit as shown

below. The highest bit of register address is to distinguish block write/read and byte write/read. when the highest bit is "1", it's the byte

operation, the highest bit is "0", it's the block operation.

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

Address Assignment

A6

A5

A4

A3

A2

A1

A0

R/W

1

1

0

See SMBus Address Selection Table

1/0

Note: SMBus address is latched on SADR pin

Byte Write

1 bit

7 bits

1 bit

1 bit

8 bits

1 bit

8 bits

1 bit

1 bit

Start bit

Address

W(0)

Ack

Beginning Byte

location=N

Ack

data

Ack

Stop bit

Byte Read

1 bit

7 bits

1 bit

1 bit

8 bits

1 bit

1 bit

7 bits

1 bit

8 bits

1 bit

1 bit

Start bit Address

W(0)

Ack

Beginning Byte

location=N

Ack

Repeat

Start bit Address

R(1)

data

NAck

Stop bit

Block Write

1 bit

7 bits

1 bit 1 bit

8 bits

1 bit

8 bits

1 bit

8 bits

1 bit

8 bits

1 bit 1 bit

Start

bit Address W(0) Ack

Beginning

Byte Location

= N

Ack Data Byte

count = X Ack

Beginning

Date Byte

(N)

Ack

........

Data Byte

(N+X-1)

Ack Stop

bit

Block Read

1 bit

7 bits

1 bit 1 bit

8 bits

1 bit

1 bit

7 bits

1 bit 1 bit

8 bits

1 bit

8 bits

1 bit

Start

bit

Address W(0) Ack

Beginning

Byte Location

= N

Ack

Repeat

Start bit Address R(1)

Ack Data Byte

count = X Ack

Beginning

Date Byte

(N)

Ack

8 bits

1 bit

1 bit

........

Data Byte

(N+X-1)

NAck Stop bit