UCS81003 datasheet(99/108 Pages) MICROCHIP

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DS20005334A-page 99

UCS81003

11.2.4

I2C PROTOCOLS

The UCS81003 supports I2C Block Read and Block

Write. The protocols listed below use the convention 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 automatically

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

1 ->0

YYYY_YYY

XXh

Data

ACK

Data

ACK

. . .

Data

ACK

STOP

XXh

. . .

XXh

0 -> 1

Note:

When using the Block Read protocol, the

internal address pointer will be automatically

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

1->0

YYYY_YYY

XXh

1 ->0

YYYY_YYY

XXh

ACK

Data

ACK

Data

ACK

Data

ACK

. . .

Data

NACK

STOP

XXh

. . .

XXh

0 -> 1

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