MCP2221 datasheet(38/80 Pages) MICROCHIP

38 / 80 page

MCP2221

DS20005292B-page 38

 2015 Microchip Technology Inc.

3.1.4

SEND FLASH ACCESS PASSWORD

This command is used to send a user-supplied

password that will be compared to the one stored in the

device’s Flash when Flash updates (Chip/GP

configuration, USB strings) are required and the Flash

data is password-protected.

In the case where no protection mechanism is in place

or the Flash data has been permanently locked, this

command has no meaning.

3.1.4.1

Responses

TABLE 3-18:

COMMAND STRUCTURE

Byte

Index

Value

Effect

0xB2

Send Flash Access Password – command code

1Don’t

care

Password byte 1

Password byte 2

Password byte 3

Password byte 4

Password byte 5

Password byte 6

Password byte 7

Password byte 8

10-63

Don’t care

TABLE 3-19:

RESPONSE 1 STRUCTURE

Byte

Index

Value

Effect

0xB2

Send Flash Access Password – command code echo

0x00

Command completed successfully

0x03

Command not allowed (when the number of failed Flash updates has been reached, no password

will be accepted)

2-63

Don’t

care

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