Troubleshooting guide

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3. PinFunctions
PINName  PIN# Description  PadType
GND 1,8,15,28,30,31,3
2,33
Groundport VSS
RX 2
UARTdatainput,activehigh. Bidirectional with weak
internalpulldown
TX 3
UARTdataoutput,activehigh. Bidirectionalwithweak
internalpullup
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PIO_3 4
Programmableinput/outputline
PIO[3]ischipselectforSPIflash
interface(BC6145ismaster).
Bidirectionalwith
programmable
strength internal
pullup/down
PIO_2 5
Programmableinput/outputline
Bidirectionalwith 
programmable
strength internal
pullup/down
PIO_1 6
PIO_0 7
RESET 9
Resetiflow.Inputdebouncedsomustbelow
for>5mstocauseareset
Input with weak
internalpullup
PIO_11 10
Programmableinput/outputline.
Bidirectionalwith 
programmable
strength internal
pullup/down
LED0 11 LEDdriver Opendrainoutput
LED1 12 LED driver Open drain output