MCP2221 datasheet(51/80 Pages) MICROCHIP

51 / 80 page

 2015 Microchip Technology Inc.

DS20005292B-page 51

MCP2221

GP1 settings

Bit 7-5

Don’t

care

Bit 4: GPIO Output value

When GP1 is set as an output GPIO, this value will be present at the

GP1 pin

Bit 3: GPIO Direction

(Input/Output) – Works

only when GP1 is set for

GPIO operation

GPIO Input mode

GPIO Output mode

Bit 2-0: GP0 Designation

111-101 Don’t care

100

Alternate function 2 (Interrupt Detection)

011

Alternate function 1 (LED UART TX)

010

Alternate function 0 (ADC1)

001

Dedicated function operation (Clock Output)

000

GPIO operation

GP2 settings

Bit 7-5

Don’t

care

Bit 4: GPIO Output value

When GP2 is set as an output GPIO, this value will be present at the

GP2 pin

Bit 3: GPIO Direction

(Input/Output) – Works

only when GP2 is set for

GPIO operation

GPIO Input mode

GPIO Output mode

Bit 2-0: GP2 Designation

111-100 Don’t care

011

Alternate function 1 (DAC1)

010

Alternate function 0 (ADC2)

001

Dedicated function operation (USBCFG)

000

GPIO operation

GP3 settings

Bit 7-5

Don’t

care

Bit 4: GPIO Output value

When GP3 is set as an output GPIO, this value will be present at the

GP3 pin

Bit 3: GPIO Direction

(Input/Output) – Works

only when GP3 is set for

GPIO operation

GPIO Input mode

GPIO Output mode

Bit 2-0: GP3 Designation

111-100 Don’t care

011

Alternate function 1 (DAC2)

010

Alternate function 0 (ADC3)

001

Dedicated function operation (LED I2C)

000

GPIO operation

12-63 Reserved

0x00

TABLE 3-36:

COMMAND STRUCTURE (CONTINUED)

Byte

Index

Function Description

Value

Effect

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