Datasheet

 2014 Microchip Technology Inc. DS20005292A-page 15
MCP2221
REGISTER 1-15: GPSETTING3 REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — 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 the GP3 is set for GPIO output operation)
1 = Default output value is logic ‘1’
0 = Default output value is logic ‘0’
bit 3 GPIODIR: GPIO Direction (input or output; valid only GP3 is set for GPIO operation)
1 = GPIO Input
0 = GPIO Output
bit 2-0 GPDES<2:0>: GP3 Designation
111 =Reserved
110 =Reserved
101 =Reserved
100 =Reserved
011 = Alternate function 2 (DAC2)
010 = Alternate function 1 (ADC3)
001 = Dedicated function operation (LEDI2C)
000 = GPIO operation (GPIO3)