BandRich BandLuxe M250, User Manual

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USB Interface
M250, M250V and M250-LC module are compliant with USB2.0 in all three modes (Low speed, Full
speed, and high speed). When two devices are connected via a USB interface, one of the devices must
act as a host, and the other device must act as a peripheral. The host is responsible for initiating and
controlling traffic on the bus. For example, the USB specification requires PCs to act as hosts, and
other devices such as M250 to act as devices.
Figure 1-5 USB Interface
1.5 USIM Interface
The universal subscriber identification module (USIM) is a smart card for UMTS/GSM cellular
applications. The USIM provides the required subscription information to allow the mobile equipment
to attach to a GSM or UMTS network. The USIM also provides the subscriber's verification
procedures as well as authentication methods for network authentication during the network
registration procedures. Upon power-up or after a soft-reset, the clock and data lines to the USIM will
be active through the initialization process. Figure 2-3 shows the SIM card pin definition. It’s
recommended to implement hardware USIM detection mechanism or complete avoiding USIM
hot-plug through mechanical design. The reference design for hardware USIM detection is provided
in the “Application Note for BandLuxe Module USIM Detection Recommendation”.
Table 1-3 SIM Card Pin Definition
Pin No. Description
1 Vcc
2 RST
3 CLK
4 GND
5 Vpp
6 I/O