
NE866B1_Hardware_Design_Guide
1VV0301354 Rev. 6
Page
16
of
70
2018-02-28
Asynchronous Auxiliary Serial Port 2 / SPI / I2C / GPIO
C1
TX_AUX
O
Auxiliary UART
(TX Data to DTE)
CMOS 1.8V
Primary Logging
Port
Default Function
SPI_MOSI
O
SPI Master Data
Out
CMOS 1.8V
Alternate
Function
GPIO2
I/O
GPIO
CMOS 1.8V
Alternate
Function
C2
GPIO3
I/O
GPIO
CMOS 1.8V Default Function
SPI_MISO
I
SPI Master Data
In
CMOS 1.8V
Alternate
Function
I2C_SCL
I/O
I2C Clock
CMOS 1.8V
Alternate
Function