User Manual

Development Board LEDs
32  Digi Connect EM & Wi-EM Hardware Reference
GPIO Switch Bank 1 (SW1) and 2 (SW2)
GPIO Switch Bank 1 and Switch Bank 2, labeled SW1 and SW2, are two sets of five slide
switches that set GPIO inputs to logic levels of high (switch to left) or low (switch to
right).
If the GPIO port is configured as an output, then the switch should always be to the left. If
there is an external device connected to P3, the switch should always be set to the left.
Each GPIO port can be used independently.
Notes:
 These switches do not determine whether the GPIO is an input or output. That
is determined by the module software.
 If GPIO is set to an output by software, switches must be set to the left (high).
 These switches are used in conjunction with SW3 and SW4.
Development Board LEDs
The development board contains 21 LEDs labeled CR1 through CR21. The following table
lists and describes the LEDs.
LED Descriptions
Board
Label
Description Color or State Indication
CR1 TXD-2
Flickering Serial activity
Green Inactive
CR2 RXD-2
Flickering Serial activity
Green Inactive
CR3 CTS
Yellow Active
Green Inactive
Off
Not connected or signal
not being driven