HUAWEI MU709 Series HSPA+ LGA Module
Hardware Guide
Description of the Application Interfaces
Issue 09 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
31
Figure 3-10 shows recommended circuit of the SLEEP_STATUS pin.
Figure 3-10
Connections of the SLEEP_STATUS pin
3.4.7 LED_MODE Signal
MU709 module provides an LED_MODE signal to indicate the work status.
Table 3-7
State of the LED_MODE pin
No.
Operating Status
LED_MODE
1
No service/Restricted service
Outputs: low (0.1s)-high (0.1s)-low
(0.1s)-high (1.7s)
2s cycle
2
Register to the network
Outputs: low (0.1s)-high (1.9s)
2s cycle
3
Dial-up successfully
Outputs: low
Figure 3-11 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. The mode indicator (LED_MODE) is current sink. Drive strength: 10 mA.