Wavecom GS64 Spécifications Page 38

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Product Technical Specification & Customer Design Guidelines
Interfaces
V24/CMOS possible design
:
Figure 6: Example of V24/CMOS serial link implementation for UART1
The design shown in the figure above is a basic design.
However, a more flexible design to access this serial link with all modem signals is
shown below:
Figure 7: Example of full modem V24/CMOS serial link implementation for UART1
It is recommended to add a 15K pull-up resistor on RI and DCD1 to set high level
during reset state.
The UART1 interface is 2.8 volt type, but is 3 volt tolerant.
© Confidential
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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WA_DEV_Q64_PTS_001-003 January 9, 2009
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