MCP2221 datasheet(46/80 Pages) MICROCHIP

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MCP2221

DS20005292B-page 46

 2015 Microchip Technology Inc.

3.1.11.1

Responses

GP3 output value

0x00

GP3 (if set up for GPIO output operation) will take a logical value of ‘0’.

Any other

value

GP3 (if set up for GPIO output operation) will take a logical value of ‘1’

Alter GP3 pin direction

(enable/disable)

0x00

Leave the GP3 GPIO designation as is (input or output)

Any other

value

The next byte (index 17) will be the value used to set GP3’s pin direction

(only if GP3 is set for GPIO operation)

GP3 pin direction

(input or output)

0x00

Set GP3 GPIO as output

Any other

value

GP3 (if set up for GPIO operation) will be set as a digital input

18-63 Reserved

0x00

TABLE 3-33:

RESPONSE 1 STRUCTURE

Byte

Index

Function

Description

Value

Effect

0x50

Set GPIO Output Values – command code

0x00

Command completed successfully

Alter GP0 output

(enable/disable) status

0xEE

If GP0 is not set for GPIO operation

Any other

value

If GP0 is already set for GPIO operation, the value will be copied from

the same byte index in the command structure

GP0 output value status

0xEE

If GP0 is not set for GPIO operation

Any other

value

If GP0 is already set for GPIO operation, the value will be copied from

the same byte index in the command structure

Alter GP0 pin direction

(enable/disable)

0xEE

If GP0 is not set for GPIO operation

Any other

value

If GP0 is already set for GPIO operation, the value will be copied from

the same byte index in the command structure

GP1 pin direction

(input or output)

0xEE

If GP1 is not set for GPIO operation

Any other

value

If GP1 is already set for GPIO operation, the value will be copied from

the same byte index in the command structure

Alter GP1 output

(enable/disable) status

0xEE

If GP1 is not set for GPIO operation

Any other

value

If GP1 is already set for GPIO operation, the value will be copied from

the same byte index in the command structure

GP1 output value status

0xEE

If GP1 is not set for GPIO operation

Any other

value

If GP1 is already set for GPIO operation, the value will be copied from

the same byte index in the command structure

Alter GP1 pin direction

(enable/disable)

0xEE

If GP1 is not set for GPIO operation

Any other

value

If the GP1 is already set for GPIO operation, the value will be copied

from the same byte index in the command structure

GP1 pin direction

(input or output)

0xEE

If GP1 is not set for GPIO operation

Any other

value

If GP1 is already set for GPIO operation, the value will be copied from

the same byte index in the command structure

Alter GP2 output

(enable/disable) status

0xEE

If GP2 is not set for GPIO operation

Any other

value

If GP2 is already set for GPIO operation, the value will be copied from

the same byte index in the command structure

TABLE 3-32:

COMMAND STRUCTURE (CONTINUED)

Byte

Index

Function

Description

Value

Effect

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