Error! No text of specified style in document. - System Integration Manual
CDMA-2X-11004-P1
Objective Specification
Design-In
Page 61 of 79
74.1
Design Guidelines
The following design guidelines must be met for optimal integration of LISA-C200 module on the
final application board.
74.1.1
Layout guidelines per pin function
This section groups u-blox C200 module pins by signal function and provides a ranking of
importance in layout design. See Table 17 for a list of pins ranked by their importance in layout
design. See LISA-C200 Data Sheet [1] or the FW75 Data Sheet [2] for the complete pin lists.
Rank
Function
Pin(s)
Layout
Remarks
1
st
RF
Connector
74.1.1.1.1.1.1.1
Very
Impo
rtant
Design for 50
characteristi
c
impedance.
74.1.1.1.1.1.1.2
2
nd
74.1.1.1.1.1.1.3
Mai
n
DC
Sup
ply
74.1.1.1.1.1.1.4
74.1.1.1.1.1.1.4.1
Ver
y
Imp
ort
ant
VCC line
should be
wide and
short. Route
away from
sensitive
analog
signals.
74.1.1.1.1.1.1.4.2
3
r
d
74.1.1.1.1.1.1.4.3
US
B
Sig
na
ls
74.1.1.1.1.1.1.4.4
Very Important
Route
USB_D+ and
USB_D- as
differential
lines: design
for 90
differential
impedance.
4
th
Ground
GND
Careful
Layout Provide
proper
grounding.
5
th
Sensitive Pin :
Careful Layout
Avoid
coupling
with noisy
signals.
Power On
HW_SHUTDOWN
PWR_ON
HW_SHUTDOWN
6
th
Digital pins and supplies: Common
Practice
Follow
common
practice
rules for
digital pin
routing.
SIM Card Interface
VSIM, SIM_CLK, SIM_IO,
SIM_RST
UART
TXD, RXD, CTS, RTS, RI
External Reset
HW_SHUTDOWN
General Purpose I/O
GPIO1, GPIO2, GPIO3,
GPIO4, GPIO5
USB detection
VUSB_DET
Supply for Interfaces
V_INT
Table 17: Pin list in order of decreasing importance for layout design
VCC
USB_D-
USB_D+
ANT
