XCite™ OEM RF Module – Product Manual v1.1
Block Diagram
Figure 1.
XCite OEM RF Module Block Diagram
MaxStream’s proprietary XII™ (Interference Immunity Technology) is contained in the
‘Interference Filter’ of the block diagram. The filter blocks interference from pagers and cellular.
Module Pin Signals
XCite Module pin signals and their functions:
Table 1.
J1 Pin Descriptions
(Low-asserted signals distinguished with a horizontal line over signal name.)
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
I*
low
Reset Module Parameters
7
DO3
O
high
Receive (RX) LED
low
- Asserted during transmission
8
/ PWR
O
high
PWR – Indicates power is on
9
CONFIG
I*** low
Backup method for entering AT Command Mode. Primary
method is with “+++” [See
10
VCC
I
-
2.85 – 5.50 VDC Regulated
11
GND
- -
Ground
* Pin
utilizes
10K
Ω
Pull-Up resistor (already installed in the module)
** Pin
utilizes
10K
Ω
Pull-Down resistor (already installed in the module)
***
Pin utilizes 100K
Ω
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 2.
J2 Pin Descriptions
Module Pin
Signal Name
1 reserved
2 GND
3 GND
4 GND
J2 pins are used primarily for mechanical stability and
may be left disconnected.
© 2004 MaxStream, Inc., Confidential and Proprietary
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