Specifications

AT Command Set Reference
Ver. 1.00
GSM1308AT001 Page 228 Ver. 1.00 – 10/29/2008
4.4.2 $IOBLKS GPIO Block Configuration
(continued)
Notes Several of the GPIO share functionality with
other buses. These blocks of GPIO can
only be enabled to function as either the
defined bus or as GPIO.
MCSI shares GPIO 9-12
SPI shares GPIO 13-18
Keyboard shares GPIO 19-26
currently ONLY GPIO 1-20 are enabled
for use.
The “at$IOBLKS=0,1” command will fail if an event has already been added
that uses 1 of the MCSI block GPIOs (Input: 62-65; Output: 54-57, 66-69, 78-
81, 90-93, 102-105).
The “at$IOBLKS=1,1” command will fail if an event has already been added
that uses 1 of the SPI block GPIOs (Input: 66-71; Output: 58-63, 70-75, 82-
87, 94-99, 106-111).
The “at$IOBLKS=2,1” command will fail if an event has already been added
that uses 1 of the Keyboard block GPIOs (Input: 72-73; Output: 64-65, 76-77,
88-89, 100-101, 112-113).
The “at$IOBLKS=3,1” command will fail if an event has already been added
that uses 1 of the TX Indicator block GPIO (Input: 3; Output: 3,11,19,27,35).