UCS1003-2 datasheet(129/138 Pages) MICROCHIP

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 2014-2015 Microchip Technology Inc.

DS20005346B-page 129

UCS1003-1/2/3

11.2.4

I2C PROTOCOLS

The UCS1003-1 supports I2C block read and block

write. The protocols listed below use the convention

shown in Table 11-3.

11.2.4.1

Block Write

The block write is used to write multiple data bytes to a

group of contiguous registers, as shown in Table 11-8.

11.2.4.2

Block Read

The block read is used to read multiple data bytes from

a group of contiguous registers, as shown in Table 11-9.

Note:

When using the block write protocol, the

Internal Address Pointer will be automati-

cally incremented after every data byte is

received; it will wrap from FFh to 00h.

TABLE 11-8:

BLOCK WRITE PROTOCOL

Start

Client

Address

ACK

Address

ACK

Data

ACK

 0

YYYY_YYY

XXh

Data

ACK

Data

ACK

. . .

Data

ACK

Stop

XXh

. . .

XXh

 1

Note:

When using the block read protocol, the

Internal Address Pointer will be automati-

cally incremented after every data byte is

received; it will wrap from FFh to 00h.

TABLE 11-9:

BLOCK READ PROTOCOL

Start

Client

Address

ACK

Address

ACK

Start

Client

Address

ACK

Data

 0

YYYY_YYY

XXh

 0

YYYY_YYY

XXh

ACK

Data

ACK

Data

ACK

Data

ACK

. . .

Data

NACK

Stop

XXh

. . .

XXh

 1

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