SkyeModule Nova Datasheet
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Preliminary
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Skyetek Inc
1732 Wazee St. Ste 202
Denver, CO 80202
www.skyetek.com
Main 720.328.3425 Fax:720.228.2400
10.2
TTL Serial
A two-wire serial connection (no handshaking) is provided on the TXD and RXD lines where TXD and RXD are from
the module's point of view. Data exchange between the host and the SkyeModule Nova occurs according to
SkyeTek Protocol v3 (ASCII or Binary mode). See more about the protocol in section 12, Communicating with
the Module.
Serial communication is the most common and robust host interface for this module in an embedded
system. Because the interface is asynchronous, the module responds immediately upon command
completion instead of waiting for a host clock as in SPI or I
2
C.
Figure 10-2 shows a sample circuit that lets you connect the SkyeModule Nova without the host interface board.
This circuit uses an RS232 to TTL level converter to allow connection to a PC serial port. For direct connection to a
micro serial interface (using TTL/CMOS levels), simply connect directly to pins 49 and 51 of the Mini PCI express
connector. Figure 10-3 shows examples of typical communication on a signal level.
[PICTURE]
Figure 10-2: Serial Connection Diagram
