Sierra Wireless AIRPRIME WISMO218 - Manual (Page 32)

WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 32
Product Technical Specification &
Customer Design Guidelines Interfaces
3.3.4. Recommendations for Less Consumption
For better power consumption, in particular for the quiescent current, it is recommended to drive the
GPIOs as shown in the table below.
Table 4: Consumption/Software Driver Recommendations
Signal
Pin
Number
I/O I/O Type Reset State
SW Driver Recommended (Output
State)
GPIO1 24 I/O 2V8 Pull up 1 logic level
GPIO3 16 I/O 2V8 Pull up 1 logic level
GPIO5 19 I/O 2V8 Z**
Input: 0 logic level
Output: 1logic level
GPIO2 is dedicated for WISMO_READY and is not open as GPIO purpose for customer use.
GPIO4 is dedicated for TX burst indication and is not open as GPIO purpose for customer use.
** When GPIO5 is used as a general purpose output, it is necessary to have an external pull up resistor connecting to a
2.8V source. Resistance value depends on the current drain required by the application side.