User guide

Enfora GSM1308 and
GSM1318
Quad-Band Spider®
SA-G+
User Guide P a g e 8 Revision: 1.03
2.2.2 GPIO2 (INPUT/OUTPUT) PROGRAMMABLE PULL-UP SYSTEM
2.2.2.1 GPIO 2 ELECTRICAL SPECIFICATIONS
• Input VIH: >2.2 V
• Input VIL: <1 V
• Output VOH: 3 V
• Output VOL: 0
• Max Source Current: Approximately 320 μA
• Max Sink Current: 3.7 mA @ 40 V, 0.13 W
2.2.2.2 GPIO2 AS PULL-DOWN SYSTEM
Set GPIO2 to 0 by using the “AT$IOPULUP=0” command.
2.2.2.3 GPIO2 AS A PULL-UP SYSTEM
Set GPIO2 to 1 by using the “AT$IOPULUP=1” command.
*Set the bus direction as described in 3.2.1 using the AT$IOGP2=x command
where x is 0 or 1..