MCP2221 datasheet(44/80 Pages) MICROCHIP

Part #	MCP2221

Description	USB 2.0 to I2C??UART Protocol Converter with GPIO

PDF	80 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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44 / 80 page

MCP2221

DS20005292B-page 44

 2015 Microchip Technology Inc.

3.1.10

I2C READ DATA – GET I2C DATA

This command is used to read back the data from the

I2C Slave device.

3.1.10.1

Responses

TABLE 3-30:

COMMAND STRUCTURE

Byte

Index

Value

Effect

00x40

I2C Read Data – Get I2C Data – command code

1-63

Don’t

care

TABLE 3-31:

RESPONSE 1 STRUCTURE

Byte

Index

Value

Effect

00x40

I2C Read Data – Get I2C Data – command code echo

0x00

Command completed successfully

0x41

Error reading the I2C slave data from the I2C engine

Internal I2C Engine state (at the moment the command was issued) – useful for monitoring the I2C

Engine’s status

0-60

The number of read-back data bytes to follow in this packet: from 0 to a maximum of 60 bytes of

read-back bytes

127

This value is signaled when an error has occurred and the following data should not be taken into

account

4-63

User Data or Don’t care

MCP2221 Datasheet(PDF) 44 Page - Microchip Technology

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