Usb Interface - Huawei MU709s-2 Hardware Manual

HUAWEI MU709s-2 HSPA+ LGA Module
Hardware Guide
The RS-232 chip (must support 921600 bit/s) can be used to connect the MU709s-2
module with UART0. In this connection, the Complementary Metal Oxide
Semiconductor (CMOS) logic level and the Electronic Industries Association (EIA)
level are converted mutually.

3.6 USB Interface

The MU709s-2 is compliant with USB 2.0 High speed protocol. The USB interface is
powered directly from the VBAT supply. The USB signal lines are compatible with the
USB 2.0 signal specifications. Figure 3-11 shows the circuit of the USB interface.
Table 3-9 Definition of the USB interface
Pin Pin Name
No.
85 USB_DM
86 USB_DP
According to USB protocol, for bus timing or electrical characteristics of MU709s-2
USB signal, please refer to the chapter 7.3.2 of
Figure 3-11 Recommended circuit of USB interface
Issue 03 (2014-09-18)
It is recommended that set the pins related to UART interface as test points on the DTE board
for debugging. The level of RS-232 Transceivers must match that of the MU709s-2 module.
Pad Description
Type
I/O USB Data- defined in the
USB 2.0 Specification
I/O USB Data+ defined in the
USB 2.0 Specification
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2BDescription of the Application
Parameter Min.(
V)
- -
- -
Universal Serial Bus Specification 2.0.
Interfaces
Typ.( Max.(
V) V)
- -
- -
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