Qualcomm UNDP-1 Manuel d'utilisateur télécharger pdf (Page 24)

80-VF329-3 Rev. C 24 QUALCOMM Confidential and Proprietary

MAY CONTAIN U.S. EXPORT CONTROLLED INFORMATION

UNDP-1 Universal Notebook Data Platform User Guide Platform Communications

An external RUIM/USIM is supported via the off-board UICC. The PM6653 IC provides

the USIM power supply, thereby enabling support for both 1.8 V and 2.85 V UICCs. All

digital signals are buffered and level-translated by the PM6653 IC as well, ensuring

compatiblity between the external module and the MDM1000 IC.

The PMIC includes a programmable current driver (a current sink) that is used to drive an

off-board LED as required by the PCI Express Mini Card Electromechanical Specification

(key requirements are summarized in Table 5-1). The LED anode is expected to be

connected to a 3.3 V supply (with a current limiting resistor if needed); the cathode is

connected to the LED_WWAN pin that is driven by the PMIC current sink.

NOTE Any unused interface should be left unconnected.

Table 5-1 LED communications

LED state Message communicated

steady-state off UNDP-1 is not on.

steady-state on UNDP-1 is on and connected properly, but not transmitting

or receiving data.

flashing at a steady, slow rate

The flash rate is p.

UNDP-1 is on, connected properly, and actively searching

for an airlink connection.

flashing intermittently

The flash rate is proportional to data activity, a 50% duty cycle with a flash rate between 3 Hz and 20 Hz.

UNDP-1 is on, connected properly, and actively transmitting

or receiving data.

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Qualcomm UNDP-1 Manuel d'utilisateur Page 24