Huawei ME909u-521 - LED_MODE Signal

HUAWEI ME909u-521 LTE LGA Module
Hardware Guide
Description of the Application Interfaces
Issue 05 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
33
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
LED_MODE
Module
(DCE)
R
V
F
I
F
VBAT