WisLink-Cellular RAK2011
V 1.0 | Aug. 2018
Author:
Gan, Penn
Approval:
Ken Yu
10
of
28
Reference design for external CODEC extension board is shown below:
2.8 Analog Input / Digital I/O Header
A standard 2x3 (2.54mm) male header is used to
provide 2x analog input (ADC0 and ADC1 and 2x
digital input and output (GPIO0 and GPIO1) to
external extension board for additional features
that will take advantage of these analog Input and
digital I/O. Analog input and digital I/O header pin
definition is shown below:
Analog Input/Digital I/O header signal definition is shown below:
Name
Pin# I/O
Description
DC Characteristics
Comments
GPIO0
1
IO
General Purpose
Input/Output
VOLmax=0.45V, VOHmin=1.35V
VILmin=0.3V, VILmax=0.6V
VIHmin=1.2V, VIHmax=2.0V
1.8V power domain. If
unused, keep it open.
GPIO1
2
ADC0
3
AI
General Purpose
analog to digital
converter
Voltage range: 0.3V to 1.8V
15-bit resolution
If unused, keep it open.
ADC1
4
