User's Guide

80-VF329-3 Rev. C 23 QUALCOMM Confidential and Proprietary
MAY CONTAIN U.S. EXPORT CONTROLLED INFORMATION
5 Platform Communications
The main communications port between the host computer and the UNDP-1 platform
(Figure 5-1) is the high-speed USB interface. This two-wire interface enables software
downloads of boot, modem, and applications images, allows UNDP-1 status
communications, and provides the control link from the host computer to the UNDP-1
platform. An off-chip USB transceiver (the USB ULPI PHY) is used to coordinate USB
communications between the MDM1000 IC and the host computer.
Figure 5-1 UNDP-1 communication interfaces
USB
USB
ULPI
PHY
LED_WWAN
MDM1000
PM6653
status &
control
mini card edge connector
42
USIM
LED driver
UIM_PWR 8
UIM_DATA 10
UIM_CLK 12
UIM_RST_N 14
VREG_RUIM
level
translators
USB_D_N 36
USB_D_P 38