Sierra Wireless AirPrime SL808 Series, Product Technical Specification & Customer Design Manuallines, Page: 40 / 122

Product Technical Specification & Customer Design Guidelines
40 Proprietary and Confidential - Specifications subject to change 2400058
4.2.2 Signal reset states
Each interface described in this chapter includes a pin descriptions table, which
identifies each signal’s reset state.
Table 4-4 describes these reset states.
4.3 Reference schematic
Reference schematics are forthcoming.
4.4 General purpose input/output
The AirPrime SL808X Embedded Module includes three general purpose I/O
(GPIO) pins.
Table 4-5 describes the purpose and features of this interface.
Table 4-4: Reset state definition
Parameter Definition
0 Set to GND
1 Set to supply 1V8
Pull-down Internal pull-down with ~60 k

resistor
Pull-up Internal pull-up with ~60 k

resistor to supply 1V8
Z High impedance
Undefined
Caution: Undefined must not be used in an application if a special
state is required at reset. These pins may be toggling a signal(s) during
reset.
Table 4-5: GPIO interface features
Feature Details
Purpose
•
OEM-configurable general purpose I/O (control, signaling,
monitoring, etc.)
Implementation
•
Defaults to digital output
Power
•
1.8 V (use VREF_1V8 as logic reference)
•
Output drive current up to 8 mA.