Pcie Mini Card Leds; Figure 14. Location Of Pcie Mini Card Leds; Table 12: Pcie Mini Card Led States - VersaLogic VL-EBX-38 Hardware Reference Manual

PCI M C
E INI ARD
The Mini Card specification states that there are three LED outputs: WWAN, WLAN and
WPAN. There are on-board LEDs for each of these. A fourth LED is used to indicate when the
Mini Card is powered (since the Mini Card power can be configured to either be always-on or on
in S0). This indicator is very important as a warning to NOT hot-plug the Mini Card (otherwise
it might appear it is OK when the board is in a sleep mode but the Mini Card is still powered); as
a result, it is intentionally yellow to indicate "caution".

Table 12: PCIe Mini Card LED States

Green (WWAN)
Yellow (WLAN)
Green (WPAN)
(Power On)

Integrator's Note:
The 3.3 V power to the Mini Card can be controlled by the FPGA. By default, the power is always
on, but there is a register setting that turns this power off in sleep modes. The Mini Card 1.5 V
power is always turned off in sleep modes.

Figure 14. Location of PCIe Mini Card LEDs

EBX-38 Hardware Reference Manual
LED
S
LED Ref Des
D8 (Mini0)
D23 (Mini1)
D8 (Mini0)
D23 (Mini1)
D9 (Mini0)
D24 (Mini1)
Yellow D9 (Mini0)
D24 (Mini1)
State Description
On WWAN active
Off WWAN inactive
On WLAN active
Off WLAN inactive
On WPAN active
Off WPAN inactive
On Mini Card Power is On
Off Mini Card Power is Off
Multi-purpose I/O
28