MU203 Huawei 3G WCDMA UMTS wireless module Hardware Overview

MU203 Huawei 3G WCDMA UMTS wireless module

Hardware Overview

The MU203 consists of three sections: baseband section and radio frequency (RF)
section and power manager (PM) section. External interfaces include the antenna
interface and the 60-pin BTB interface.

1.3.1 Hardware Logic Block Diagram
The MU203 is completed on a single-board. Figure 1-2 shows the hardware
functional block diagram.



The circuitry of MU203 consists of three sections: baseband section, RF section and
PM section.

 The baseband section includes the baseband processor, power management
and MCP. It implements baseband signals processing, wireless protocols,
management of various peripheral devices and providing the power supply and
power management for the whole module.

 The RF section includes the RF transceiver, PA, antenna switches, duplexer,
and antenna interfaces.

 The PM section providing the power supply and power management for the
whole module.

1.3.2 External Hardware Interfaces
1. Antenna interface
The MU203 has an antenna connector and an antenna pad. External antenna can be
connected via antenna connector or antenna pad, but both solutions can only be
applied alternatively. This means, whenever an antenna is plugged to the connector,
the pad must not be used. Vice versa, if the antenna is connected to the pad, then
the connector must be left empty.

Antenna connector
The antenna connector has been chosen as antenna reference point (ARP) for the
HUAWEI reference equipment submitted to type approve MU203. All RF data
specified throughout this datasheet are related to the ARP. For compliance with the
test results of the MU203 type approval you are advised to give priority to the
connector, rather than using the antenna pad. See Section 2.1.3 for details about
antenna connector.
Antenna Pad
When you decide to use the antenna pad take into account that the pad has not been
intended as antenna reference point (ARP) for the type approval. Also, consider that
50Ω connector is mandatory for type approval measurements. This requires user
devices with an integral antenna to be temporarily equipped with a suitable connector
or a low loss RF cable with adapter.
To prevent damage to the module and to obtain long-term solder joint properties you
are advised to maintain the standards of good engineering practice for soldering. Be
sure to solder the antenna core to the pad and the shielding of the coax cable to the
ground plane of the module next to the antenna pad. The direction of the cable is not
relevant from the electrical point of view.
2. BTB connector interface
The MU203 provide a 60-pin male BTB connector interface.
− USIM interface: The USIM interface provides the interface for a USIM card.
The USIM card can be inserted into the host side.
− USB interface: The USB interface supports USB 2.0 full speed standard.
− UART interface: The module supports 3-line or full serial port interface.
− Analog voice interface: The module supports two analog audio interfaces,
each with a microphone input and an analog earpiece output.
− Power sources and grounds: 3.8V recommended, voltage range is 3.3V~4.2V.

HUAWEI MU203 WCDMA M2M Module Datasheet


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