Led_Mode Signal - Huawei MU709s-2 Hardware Manual

HUAWEI MU709s-2 HSPA+ LGA Module
Hardware Guide
Figure 3-8 shows recommended circuit of the SLEEP_STATUS pin.
Figure 3-8 Connections of the SLEEP_STATUS pin

3.4.7 LED_MODE Signal

MU709s-2 provides an LED_MODE signal to indicate the work status.
Table 3-7 State of the LED_MODE pin
No.
1
2
3
External Circuits
Figure 3-9 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.
Issue 03 (2014-09-18)
Operating Status
No service/Restricted service
Register to the network
Dial-up successfully
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2BDescription of the Application
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
Interfaces
30