EVDO PC Embedded Datasheet

Product Datasheet
V001R006
Issue 2 (2009-01-20)
Confidencein Commercial
Page 24 of 60
3.2.2 Power Sources and Grounds
The PCI Express Mini Card provides two power sources: one is +3.3Vaux (3.3 Vaux)
and the other is 1.5V (+ 1.5 V). For the EM660, +3.3Vaux is the only supply voltage
available. The input voltage is +3.3 V ± 9%, as specified by PCI Express Mini CEM
Specifications 1.2.
Table 3-3 Power and ground specifications
Name Pins Minimum Type Maximum
VCC 2, 39, 41, and 52 3.0 V 3.3 V 3.6 V
GND 4, 9, 15, 18, 21, 26, 27, 34, 35,
37, 43, and 50
0 V
3.2.3 USB Signals
The EM660 is compliant with USB 2.0 specification. It supports full-speed and low-
speed.
Table 3-4 USB pins
Name Pin Description Direction to Module
USB D- 36 USB data signal D- Input/Output
USB D+ 38 USB data signal D+ Input/Output
The USB interface is powered directly from the 3.3 V supply. The USB input/output
lines are compatible with the USB 2.0 3.3 V signal specifications.
Table 3-5 USB signal DC characteristics
V
OH
min V
OL
max V
IH
min V
IL
max
2.8V 0.3V 2V 0.8V
3.2.4 RUIM Signals
The RUIM is a smart card for CDMA cellular applications; it provides personal
authentication information that allows the mobile station or handset to be connected
with the network. The RUIM card can be inserted into any CDMA RUIM equipped
handset to enable its user to receive or make calls and receive other subscribed
services.
The internal power management circuits, UIM circuity, and UIM pads allow for
implementing both 1.8 V and/or 2.85 V cards via a direct connection.