User's Manual

8
Electrical Integration
The module communicates either over USB or through serial:
 The USB client communication follows the CDC profile and is USB 2.0-
compliant, operating at 12 Mbps (full speed).
 In Serial mode, the module communicates as a standard PC COM port, operating
at 115.2 Kbps. It has eight general purpose inputs and outputs for monitoring and
controlling external signals.
A Digital Signal Processor (DSP) controls the radio functions and provides
communication with the host. This interface allows direct reprogramming and
updating of the on-board FLASH memory
Power Requirements
The module operates off power input from 3.15 VDC to 5.2 VDC. If the input is
3.3 V DC or less, you must account for significant increased current demand. If the
input drops below 3.15 VDC, 1 Watt output is not possible.
The module handles its own power management and goes into Standby
mode automatically when there are no outstanding
commands. However, even in
Standby mode, the IM11 immediately
responds to host activity, eliminating any
potential host timeout conditions.
To achieve an even lower power Standby mode, the host needs to
support
USB suspend and remote wakeup.