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HUAWEI MC509 CDMA LGA Module
Hardware Guide
Description of the Application Interfaces
Issue 01 (2011-04-08)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
33
Figure 3-7 Connection of the UART interface in the MC509 module (DCE) with the host
(DTE)
The RS-232 Transceivers can be used to connect the MC509 module to the RS-232-
C interface. In this connection, the complementary metal oxide semiconductor
(COMS) level and the Electronic Industries Association (EIA) level are converted
mutually.
For detailed application of the MC509 UART interface, see the HUAWEI LGA Module UART
Design Guide.
It is recommended that set the pins related to UART interface as test points on the DTE for
debug.
3.6 USB Interface
The MC509 is compliant with USB 2.0 full speed protocol. The USB interface is
powered directly from the 3.3 V supply. The USB input/output lines are compatible
with the USB 2.0 3.3 V signal specifications. 0shows the circuit of the USB interface.
Table 3-9 USB interface signals
Pin No.
Pin Name
I/O
Description
86
USB_DP
I/O
USB data signal D+
85
USB_DM
I/O
USB data signal D-