10

A Product Line of

Diodes Incorporated

PI6CBF18501

www.diodes.com

October 2020

Diodes Incorporated

PI6CBF18501

Document Number DS43130 Rev 2-2

SMBus Serial Data Interface

PI6CBF18501 is a slave only device that supports block 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.

Address Assignment

A6

A5

A4

A3

A2

A1

A0

R/W

1

1

0

1

See SBMus Address Selection table

1/0

Note: SMBus address is latched on SADR pin

How to 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

Add.

W(0)

Ack

Beginning

Byte loca-

tion = N

Ack

Data Byte

count = X

Ack

Beginning

Data Byte

(N)

Ack

.......

Data Byte

(N+X-1)

Ack

Stop bit

How to 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 loca-

tion = N

Ack

Repeat

Start bit

Address

R(1)

Ack

Data Byte

count = X

Ack

Beginning

Data Byte

(N)

Ack

8 bits

1 bit

1 bit

.......

Data Byte

(N+X-1)

NAck

Stop bit