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MCP2221 Datasheet(PDF) 26 Page - Microchip Technology

Part # MCP2221
Description  USB 2.0 to I2C??UART Protocol Converter with GPIO
PDF  80 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP2221 Datasheet(HTML) 26 Page - Microchip Technology

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MCP2221
DS20005292B-page 26
 2015 Microchip Technology Inc.
3.1.2
READ FLASH DATA
This command is used to read various important data
structures and strings that are stored in Flash memory
on the MCP2221.
3.1.2.1
Responses
TABLE 3-3:
COMMAND STRUCTURE
Byte
Index
Function Description
Value
Effect
0
0xB0
Read Flash Data – command code
1
Read Flash Data Sub-code.
The value in this field will instruct
the MCP2221 on what Flash
data to be read.
0x00
Read Chip Settings – it will read the MCP2221 flash
settings
0x01
Read GP Settings – it will read the MCP2221 flash GP
settings
0x02
Read USB Manufacturer Descriptor String – reads the
USB Manufacturer String Descriptor used during the USB
enumeration
0x03
Read USB Product Descriptor String – reads the USB
Product String Descriptor used during the USB
enumeration
0x04
Read USB Serial Number Descriptor String – reads the
USB Serial Number String Descriptor that is used during
USB enumeration. This serial number can be changed by
the user through a specific USB HID command.
0x05
Read Chip Factory Serial Number – reads the factory-set
serial number. This serial number cannot be changed.
Any other
value
No meaning. The device will reply with a code for an
unsupported command at Byte Index 1 in the Response
report.
2-63
Reserved
0x00
TABLE 3-4:
RESPONSE STRUCTURE
Byte
Index
Function Description
Value
Effect
0
0xB0
Read Flash Data – command code
1
0x00
Command completed successfully
0x01
Command not supported
2
Data structure length or
Don’t care
3-63
Data or Don’t care
Depends on the issued sub-command or the returned
code at Byte Index 1



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