Led_Mode Signal - Huawei ME909u-521 Hardware Manual

HUAWEI ME909u-521 LTE LGA Module
Hardware Guide
Its drive current is no more than 2 mA.
Figure 3-12 shows recommended circuit of the SLEEP_STATUS pin.
Figure 3-12 Connections of the SLEEP_STATUS pin

3.4.7 LED_MODE Signal

If you need the LED function, you need reserve circuit and refer to the following figure
till the relative firmware is ready.
Figure 3-13 shows the recommended circuits of the LED_MODE pin. According to
LED feature, you can adjust the LED brightness by adjusting the resistance of resistor
R.
Figure 3-13 Driving circuit
Issue 05 (2017-12-15)
Module
(DCE)
LED_MODE
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
V I
R
F
VBAT
F
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