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G700-U10 Smartphone
Maintenance Manual
10.4.15 USB Port Circuit
Circuit Diagram
Figure 10-56 USB port circuit
Circuit Analysis
The USB port circuit is simple. USB_DM and USB_DP are the data lines. VUSB is the
voltage signal, which is 3.3 V.
KCOL0 is the USB download triggering signal. When KCOL0 is grounded, the system enters
USB download mode.
Issue 1.0 (2013-07-22)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
10 Circuit and Failure Analysis
82
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