User's Manual

EM300 Data Card Integration Guide
R&D Division, Handheld & Mobile Communication,
Taipei Design Center, Wistron Corp.
Engineering Specification
18
General
The EM300 MODULE are designed to meet the EM300 module electro-mechanical card standard with some
exceptions to accommodate the power requirements. These modules all support only the USB portion of the
minicard standard.
Chipset
The MSM 6281 baseband processor, PM6658 power management IC, RTR 6285 shall be the chipset used for
RF transceiver.
EM300 MODULE
Mobile stations are limited to 2 watts maximum EIRP. The equipment shall employ means to limit the
power to the minimum necessary for successful communication.
The power is supplied to EM300 through the PCI Express Mini Card interface, while VBAT is supplying
voltage to the baseband section. It must be able to provide sufficient current to the power amplifier during the
transmission period.
The analog baseband IC on EM300 has a power management section which controls the voltage
distribution to all functions on the module. The power management section has the following features:
- With low drop linear voltage regulators, the voltages supplied to the GSM baseband can be stabilized.
- During the power-up and power-down procedures, it controls the voltages of the module.
- It provides VREG_MSMP for all external applications. However, in power-down mode, this voltage is not
present.
- It also provides various voltages for the SIM.