WM_PRJ_Q2501_PTS_002
- 001
March
2004
confidential ©
Page:
60 / 79
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4 PCB Design
4.1 General Rules and Constraints
On the application board, it is strongly recommended to avoid routing any
signals under the module.
Clock and other high frequency digital signals (e.g. serial buses) should be
routed as far as possible from the WISMO analog signals.
If the application design makes it possible, all analog signals should be
separated from digital signals by a Ground line on the PCB.
4.2 Specific Routing Constraints
4.2.1 System Connector
Refer to the datasheet of the 80-pin receptacle (from MOLEX) given in
More detailed information is also available at the following internet
4.2.2 Power Supply
4.2.2.1 Routing
constraints
Since the maximum peak current can reach 2 A, WAVECOM strongly
recommends a large width for the layout of the power supply signal (to
avoid voltage loss between the external power supply and the module
supply).
Pins 75, 77, 78, 79 and 80 should be gathered in a same piece of
copper, as shown in the figure hereafter.
External power supply track
VBATT Pin: 75, 77, 78, 79, 80
Figure 36 :Example of power supply routing
Summary of Contents for WISMO Quik Q2501
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