User’s Manual
95
when operating close to the 3.0 V minimum voltage (for example, keep the power supply as close as
possible to the RCM4510W) since your RCM4510W could reset unintentionally.
The RCM4510W has a reset output, pin 3 on header J1.
C.1.4 XBee RF Module Power Supply
The XBee RF module is isolated from digital noise generated by other components by way of a low-
pass filter composed of L5 and C90 on the RCM4510W as shown in Figure C-3. The filtered power
supply powers the XBee RF module, and is available via pin 8 of auxiliary I/O header J4 on the
RCM4510W module. If you draw on this filtered power supply, the maximum current draw is 25
mA.
Figure C-3. XBee RF Module Supply Circuit
C.2 Powerdown Mode
The XBee RF module can power down the remaining RCM4510W circuitry via the
zb_Rabbit_poweroff()
or the
xb_sleep()
Dynamic C function calls. The real-time clock
and the data SRAM will still be powered during the powerdown from the +3.3 V DC supplied to
the RCM4510W module via header J1 as long as that voltage exceeds the voltage of the backup
battery.
+3.3 V
C90
10 µF
L5
Fi3.3 V Supply
to ZigBee Modem
