MCP2221 datasheet(13/80 Pages) MICROCHIP

13 / 80 page

 2015 Microchip Technology Inc.

DS20005292B-page 13

MCP2221

GPSETTING1 REGISTER

R/W-0

R/W-1

R/W-0

R/W-1

—

GPIOOUTVAL

GPIODIR

GPDES2

GPDES1

GPDES0

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-5

Reserved: Set to ‘0’

bit 4

GPIOOUTVAL: GPIO Output Value (valid only when GP1 is set for GPIO output operation)

1 = Default output value is logic ‘1’ (factory default)

0 = Default output value is logic ‘0’

bit 3

GPIODIR: GPIO Direction (input or output; valid only when GP1 is set for GPIO operation)

1 = GPIO Input

0 = GPIO Output (factory default)

bit 2-0

GPDES<2:0>: GP1 Designation

111 = Reserved

110 = Reserved

101 = Reserved

100 = Alternate function 2 (Interrupt detector)

011 = Alternate function 1 (LED UART TX – LEDUTX) (factory default)

010 = Alternate function 0 (ADC1)

001 = Dedicated function operation (Clock Output)

000 = GPIO operation (GPIO1)

MCP2221 数据表(PDF) 13 Page - Microchip Technology

MCP2221 数据表(HTML) 13 Page - Microchip Technology

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