Sierra Wireless AirPrime SL808 Series, Product Technical Specification & Customer Design Manuallines, Page: 41 / 122

Rev 1 Dec.10 Proprietary and Confidential - Specifications subject to change 41
4.4.1 Pin descriptions
Table 4-6 describes the GPIO interface pins.
See Digital I/O electrical information on page 39 for 1V8 voltage characteristics
and reset state definitions.
Caution: Sierra Wireless reserves the right to dedicate any of these pins for specific
purposes in the future. Use at your own risk.
4.5 Main serial link (UART1)
The AirPrime SL808X Embedded Module includes a serial link (UART1) for host–
module communication.
Table 4-7 describes the purpose and features of this
interface.
Note: The SL808X may be provisioned with the ability to use the UART1 interface to
communicate with peripheral devices. Contact Sierra Wireless for further information.
Table 4-6: GPIO pin descriptions
Pin Signal I/O type
Reset state
a
a. See Table 4-4 on page 40 for state definitions.
Description
1 GPIO_3 1V8
•
Using EMConnect: Set
by user
•
Not using EMConnect:
Input, pull-down
Configurable general
purpose I/O
2 GPIO_2 1V8
3 GPIO_1 1V8
Table 4-7: UART1 interface features
Feature Details
Purpose
•
Serial host–module communication
•
Dependent on provisioning, communication with peripheral
devices. Contact Sierra Wireless for further information.
Implementation
•
Four-wire serial interface based on TIA-232 (RS232
protocol)
•
An RS-232 level shifter device may be required.
Data rates supported
•
High speed (up to 4 Mbps)
Optional functionality
•
Dependent on provisioning, module may be able to commu-
nicate with peripheral devices. Contact Sierra Wireless to
discuss possible firmware support.