AC4490 User Guide
Version 4.5
Laird Connectivity Solutions Support Center:
http://ews-support.lairdtech.com
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Europe: +44-1628-858-940
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Receive Mode
When a transceiver is not in Transmit or Command mode, it is in Receive mode listening for data. While in
Receive mode, subsequent data of up to 80 bytes can be received every hop (20 ms).
Command Mode
A radio enters Command mode when data is received over the serial interface from the OEM host and
contains the AT+++ (Enter AT Command mode) command or when the state of the CMD/DATA pin is
transitioned low. Once in Command mode, the radio interprets all data received as command data.
Command data can be either EEPROM configuration or on-the-fly commands.
Figure 1: Pending RF Buffer Flow
