9XCite"燨EM燫F燤odule?燩roduct燤anual爒2.1燵2007.01.04]
2007燤axStream,營nc.
牋牋?
1.4. Block Diagram
Figure?02.  XCite燨EM燫F燤odule燘lock燚iagram
MaxStream's proprietary XII" (Interference Immunity Technology) is contained in the 'Interfer-
ence Filter' of the block diagram. The filter blocks interference from pagers and cellular.
1.5. Pin Signals
XCite Module pin signals and their functions:
Table?02.   J1燩in燚escriptions 
(Lowasserted爏ignals燿istinguished爓ith燼爃orizontal爈ine爋ver爏ignal爊ame.)
*
Pin utilizes 10K ? Pull-Up resistor (already installed in the module)
**
Pin utilizes 10K ? Pull-Down resistor (already installed in the module)
***
Pin utilizes 100K ? Pull-Up resistor (already installed in the module)
Note: When integrating the XCite Module onto a Host PC Board, all lines that are not used should be
left disconnected (floating).
Table?03.   J2燩in燚escriptions 
J2爌ins燼re爑sed爌rimarily爁or爉echanical爏tability燼nd爉ay燽e爈eft燿isconnected.
Module Pin
Signal Name
I/O
When Active
Description
1
DO2
O*
low
Clear-to-Send (    ) Flow Control
2
DI3
I*
high
Can be used to enter Sleep Modes that consume less power
3
DO (Data Out)
O*
n/a
Serial Data leaving the XCite Module
(to the host)
4
DI (Data In)
I
n/a
Serial data entering the XCite Module
(from the host)
5
DI2
I**
low
Request-to-Send (    )
6
RESET
I*
low
Reset Module Parameters
7
DO3
O
high
Receive (RX) LED
8
TX
 / PWR
O
low
TX
 - Asserted during transmission
high
PWR  Indicates power is on
9
CONFIG
I***
low
Backup method for entering AT Command Mode. Primary
method is with +++ (refer to the CC parameter)
10
VCC
I
-
2.85  5.50 VDC Regulated
11
GND
-
-
Ground
Module Pin
Signal Name
1
reserved
2
GND
3
GND
4
GND
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