User's Guide

LE866 HARDWARE USER GUIDE 1vv0301210 Rev.0 Preliminary 2015-09-02 38 of 68
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General Purpose I/O
The LE866 module is provided by a set of Configurable Digital Input / Output pins (CMOS 1.8V)
Input pads can only be read; they report the digital value (high or low) present on the pad at the read
time.
Output pads can only be written or queried and set the value of the pad output.
An alternate function pad is internally controlled by the LE866 firmware and acts depending on the
function implemented.
The following table shows the available GPIO on the LE866:
PAD
Signal
I/O
Drive
Strength
Default
State
NOTE
C5
GPIO_01
I/O
TBD mA
INPUT
Alternate functions:
Digital Audio Interface (WA0
C6
GPIO_02
I/O
TBD mA
INPUT
Alternate functions:
Digital Audio Interface (RX)
D6
GPIO_03
I/O
TBD mA
INPUT
Alternate functions:
Digital Audio Interface (TX)
D5
GPIO_04
I/O
TBD mA
INPUT
Alternate functions:
TX Disable
Digital Audio Interface (CLK)
B5
GPIO_05
I/O
TBD mA
INPUT
Alternate functions:
TX_Monitor
B4
GPIO_06
I/O
TBD mA
INPUT
Alternate functions:
ALARM
C4
GPIO_07
I/O
TBD mA
INPUT
Alternate functions:
STAT LED
NOTE:
The internal GPIO’s pull up/pull down could be set to the preferred status for the
application using the AT#GPIO command.
Please refer for the AT Commands User Guide for the detailed command
Syntax.