PAC1721 datasheet(31/92 Pages) MICROCHIP

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DS-20007088A-page 31

PAC1721

5.6

SMBus/I2C Commands

The following section describes the commands sent to

PAC1721 using the SMBus or I2C protocols.

5.6.1

REFRESH AND REFRESH_V

Issue Refresh and Refresh_V commands using the

Send Byte. Specify the target address and the selected

command data (00h for REFRESH or 15h for

REFRESH_V) as shown in Table 5-3.

5.6.2

GENERAL CALL RESPONSE

When the host sends the General Call Address,

PAC1721 is able to execute a Refresh_G command.

For more details, see Section 4.2.3.

Issue the Refresh_G command using the Send Byte.

Specify the target address, the General Call Address

(0000 000b) and the REFRESH_G command register

address (14h).

Table 5-4 shows the PAC1721 General Call Response

to a Refresh_G command.

5.6.3

WRITE BYTE

Use the Write Byte to write one byte of data to the

specified register address, as shown in Table 5-5.

TABLE 5-3:

REFRESH AND REFRESH_V COMMANDS

START

Condition

Target

Address

ACK

REFRESH or

REFRESH_V

Address

ACK

STOP

Condition

1 → 0

YYYY_YYY

00h or 15h

00 → 1

TABLE 5-4:

GENERAL CALL RESPONSE

START

Condition

General Call

Address

ACK

REFRESH_G

Address

ACK

STOP

Condition

1 → 0

0000_000

14h

00 → 1

TABLE 5-5:

WRITE BYTE

START

Condition

Target

Address

ACK

Address

ACK

Data

ACK

STOP

Condition

1 → 0

YYYY_YYY

XXh

00 → 1

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