Huawei ME99 Series Mini PCIe Module ME909 User Manual
HUAWEI ME909 Series Mini PCIe Module
Hardware Guide
Hardware Guide
Description of the Application Interfaces
Issue 0.1 (2013-06-09)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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3.7 W_DISABLE# Signal
The W_DISABLE# signal is provided to allow users to disable wireless
communications of the module.
communications of the module.
T
he software version is planning.
3.8 LED_WWAN# Signal
ME909 provides a LED_WWAN# signal to indicate the RF status.
The ME909 module does not support this function because the software feature is
under development. The planning drive strength is10 mA.
under development. The planning drive strength is10 mA.
External Circuits
Figure 3-7 shows the recommended circuits of the LED_WWAN# pin. According to
LED feature, you can adjust the LED brightness by adjusting the resistance of resistor
R.
LED feature, you can adjust the LED brightness by adjusting the resistance of resistor
R.
Figure 3-7 Driving circuit
3.9 USB Interface
The ME909 module is compliant with USB 2.0 protocol. The USB interface is powered
directly from the VBAT supply. The USB input/output lines are compatible with the
USB 2.0 signal specifications.
directly from the VBAT supply. The USB input/output lines are compatible with the
USB 2.0 signal specifications.
Figure 3-8 shows the circuit of the USB interface.