22
Configuring the AC4790
The AC4790 can be configured using the CC Configuration Commands. The CC Commands can be issued using either
Hardware or Software Configuration. To use Hardware Configuration, pin 17 of a transceiver must be asserted Low.
Software Configuration can be used by entering AT Command Mode before issuing the CC Commands.
Figure 9 - Configuration Flow of the 4790
6
AC4790
AT
C
OMMANDS
The AT Command mode implemented in the AC4790 creates a virtual version of the Command/Data pin. The “Enter AT
Command Mode” Command asserts this virtual pin Low (to signify Command Mode) and the “Exit AT Command Mode”
Command asserts this virtual pin High (to signify Data). Once this pin has been asserted Low, all On-the-Fly CC
Commands documented in the manual are supported.
When in AT Command Mode, the user cannot send or receive RF packets. However, an ambiguity of approximately
10ms exists where, if the “Enter AT Command Mode” Command has been sent to the transceiver at the same time an RF
packet is being received, the RF packet could be sent to the OEM Host before the “Enter AT Command Mode”
Command response is sent to the OEM Host.
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