Led_Mode Pin - Huawei ME909u-523 Hardware Manual

HUAWEI ME909u-523 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 Pin

ME909u-523 module provides a LED_MODE signal to indicate the work status.
Table 3-6 State of the LED_MODE pin
No.
1
2
3
4
External Circuits
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.
Issue 01 (2014-05-24)
Operating Status
No service/Restricted service
Register to the network
Dial-up successfully
Flight mode
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Description of the Application Interfaces
LED_MODE
Outputs: low (0.1s)-high (0.1s)-low
(0.1s)-high (1.7s)
2s cycle
Outputs: low (0.1s)-high (1.9s)
2s cycle
Outputs: low
Outputs: high
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