MCP2221A USB-to-UART/I2C Converter
USB-to-UART serial converter with I2C master, four multifunction GP pins (GPIO, ADC, DAC, clock, LED), integrated USB termination and oscillator. Supply 3.3V USB.
Aliase:MCP2221A-I/SL
SOIC-14 Top View
14 Pins
Pinout Table14
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | VDD | Power | Power supply |
| 2 | GP0 | Digital | General purpose I/OSSPND status outputLED_URX UART RX activity output |
| 3 | GP1 | Digital | General purpose I/OCLKR clock reference outputADC1 analog input channel 1 |
| 4 | RST | Digital | Reset input, internal pull-up |
| 5 | URX | Digital | UART RX input |
| 6 | UTX | Digital | UART TX output |
| 7 | GP2 | Digital | General purpose I/OUSBCFG device configured status outputADC2 analog input channel 2 |
| 8 | GP3 | Digital | General purpose I/OLED_I2C USB-I2C traffic indicator outputADC3 analog input channel 3 |
| 9 | SDA | Digital | I2C data line |
| 10 | SCL | Digital | I2C clock line |
| 11 | VUSB | Power | USB power pin, internally 3.3V, bypass with ceramic cap |
| 12 | D- | Digital | USB D- data line |
| 13 | D+ | Digital | USB D+ data line |
| 14 | VSS | Ground | Ground |