XT09-PKI-EA Digi International/Maxstream, XT09-PKI-EA Datasheet - Page 16

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XT09-PKI-EA

Manufacturer Part Number
XT09-PKI-EA
Description
MODEM RF 900MHZ 1W ETHER W/ACC
Manufacturer
Digi International/Maxstream
Series
XTend™r
Datasheet

Specifications of XT09-PKI-EA

Function
Transceiver, Modem
Modulation Or Protocol
FHSS, FSK
Frequency
900MHz
Interface
RJ-45 Ethernet
Sensitivity
-110dBm
Data Rate - Maximum
10 kbps
Voltage - Supply
7 V ~ 28 V
Package / Case
Module
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Power - Output
-
Applications
-
9XTend‐PKG‐E™ Ethernet RF Modem – Product Manual v2.x4x [2007.01.04]
3.2.3. Receive Mode
3.2.4. Sleep Mode
Software Sleep
If a modem detects RF data while operating in Idle Mode, the modem transitions to Receive Mode
to start receiving RF packets. Once a packet is received, the modem checks the CRC (cyclic redun-
dancy check) to ensure that the data was transmitted without error. If the CRC data bits on the
incoming packet are invalid, the packet is discarded. If the CRC is valid, the packet proceeds to the
DO Buffer.
Figure 3‐04. Receive Mode Data Flow
* Refer to the ‘Address Recognition’ sec‐
tion for more information regarding 
address recognition.
The modem returns to Idle Mode
when valid RF data is no longer
detected or after an error is
detected in the received RF data. If
serial data is stored in the DI
buffer while the modem is in
Receive Mode, the serial data will
be transmitted after the modem is
finished receiving data and returns
to Idle Mode.
Sleep Modes enable the modem to enter states of low-power consumption when not in use. Three
software Sleep Modes are supported:
In order to enter Sleep Mode, the following condition must be met (in addition to the modem hav-
ing a non-zero SM parameter value):
When in Sleep Mode, the modem will not transmit or receive data until the modem first transitions
to Idle Mode. All Sleep Modes are enabled and disabled using SM Command. Transitions into and
out of Sleep Modes are triggered by various mechanisms as shown in the table below.
Table 3‐01. Summary of Sleep Mode Configurations
Sleep Mode
(Setting)
Serial Port Sleep
(SM = 2)
Cyclic Sleep
(SM = 4 - 8)
The modem is idle (no data transmission or reception) for the amount of time defined by the ST
(Time before Sleep) parameter. [NOTE: ST is only active when SM = 4-5.]
© 2007 MaxStream, Inc., Confidential & Proprietary ‐ All Rights Reserved 
• Serial Port Sleep (Wake on Serial Port activity)
• Cyclic Sleep (Wake on RF activity)
Transition into
Sleep Mode
Automatic transition to Sleep Mode
occurs after a user-defined period of
inactivity (no transmitting or receiving of
data).
Period of inactivity is defined by the ST
(Time before Sleep) Command.
RF modem transitions in and out of Sleep Mode in cycles (user-selectable
wake-up interval of time is set using the SM command). The cyclic sleep
interval of time must be shorter than the interval of time that is defined by the
LH (Wake-up Initializer TImer) command.
Note: The modem can be forced into Idle Mode using the SLEEP pin if the
PW (Pin Wake-up) command is issued.
Transition out of Sleep
Mode (wake)
When a serial byte is received on
the DI pin
Related
Commands
(SM), ST
(SM), ST, HT,
LH, PW
Power
Consumption
< 210 mA
< 210 - 224 mA
when sleeping
(SM=4, 1 sec.,
@120K baud)
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