Multitech MultiConnect xDot MTXDOT Series, Developer'S Manual

Page: 21 / 67

SPECIFICATIONS AND PIN INFORMATION
MultiConnect
®
xDot
TM
MTXDOT Developer Guide 21
Signal Description Conditions Min Typical Max Units
ICC Idle mode (no TX, no
RX), processor active -- 11.1 mA
TX, TXP=2 -- 50 mA
TX, TXP=11 -- 62.5 mA
TX, TXP=20 -- 120 mA
Maximum supply
current. Transmitting
at TXP=20, all
peripherals active, no
load on IO pins. VDD
= 3.3V. 25 degC
ambient
temperature. -- -- 250 mA
Sleep mode -- 2.1 -- uA
Deep sleep mode -- 1.8 -- uA
RX -- 26.8 -- mA
T
NRESET
NRESET minimum
pulse duration -- 1 -- -- ms
V
NRESET
Low NRESET input low
level -- -- -- 0.3 * VDD V
V
NRESET
High NRESET input high
level Note: The xDot has
an internal pull-up
resistor. 0.39 * VDD + 0.6 -- -- V
Measuring the Power Draw
To measure the power draw on an xDot developer board:
1. Flash the latest AT command firmware on the xDot.
2. Unplug the xDot from the computer and then reconnect it.
3. Connect current meter across JP30 on the developer board.
4. Set wake pin to wake, AT+WP=6 .
5. Set wake mode to interrupt, AT+WM=1 .
6. Put the xDot to sleep, AT+SLEEP=0|1 .
7. Put jumper across JP5.
Note: After this step, AT command and debug ports no longer work.
8. Measure current draw.
9. Press the S2 button on the developer board to wake the xDot