XT09-PKI-E-NA Digi International/Maxstream, XT09-PKI-E-NA Datasheet - Page 17

• Manufacturer Part Number: XT09-PKI-E-NA
• Description: MODEM RF 900MHZ 1W ETHER INT
• Manufacturer: Digi International/Maxstream
• Series: XTend™r

Specifications of XT09-PKI-E-NA

• 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]
The SM (Sleep Mode) command is central to setting all Sleep Mode configurations. By default,
Sleep Modes are disabled (SM = 0) and the modem remains in Idle/Receive Mode. When in this
state, the modem remains constantly ready to respond to serial or RF activity.
Serial Port Sleep (SM = 2)
Serial Port Sleep is a Sleep Mode in which the modem runs in a low power state until serial data is
detected on the DI pin.
The period of time the modem sleeps is determined by ST (Time before Sleep) Command. Once a
character is received through the DI pin, the modem returns to Idle Mode and is fully operational.
Cyclic Sleep (SM = 4-8)
Cyclic Sleep Modes allow modems to periodically wake and check for RF data. The modem wakes
according to the times designated by the Cyclic sleep settings. If the modem detects a wake-up
initializer during the time it is awake, the modem synchronizes with the transmitting modem and
receives data after the wake-up initializer runs its duration. Otherwise, the modem returns to
Sleep Mode and continues to cycle in and out of activity until a wake-up initializer is detected.
While the modem is in Cyclic Sleep Mode, CTS (GPO1) is de-asserted (high) to indicate that data
should not be sent to the modem. When the modem awakens to listen for data, GPO1 is asserted
and any data received on the DI Pin is transmitted. The PWR pin is also de-asserted (low) when
the modem is in Cyclic Sleep Mode.
The modem remains in Sleep Mode for a user-defined period of time ranging from 0.5 seconds to
16 seconds (SM parameters 4 through 8). After this interval of time, the modem returns to Idle
Mode and listens for a valid data packet for 100 ms. If the modem does not detect valid data (on
any frequency), the modem returns to Sleep Mode. If valid data is detected, the modem transi-
tions into Receive Mode and receives the incoming RF packets. The modem then returns to Sleep
Mode after a period of inactivity determined by the ST "Time before Sleep" parameter.
The modem can also be configured to wake from cyclic sleep when the SLEEP pin is de-asserted.
To configure a modem to operate in this manner, PW (Pin Wake-up) Command must be issued.
Once the SLEEP pin is de-asserted, the modem is forced into Idle Mode and can begin transmitting
or receiving data. It remains active until data is no longer detected for the period of time specified
by the ST Command, at which point it resumes its low-power cyclic state.
Cyclic Scanning. Each RF transmission consists of an RF Initializer and payload. The RF initializer
contains initialization information and all receiving modems must wake during the wake-up initial-
izer portion of data transmission in order to be synchronized with the transmitting modem and
receive the data.
The cyclic interval time defined by SM (Sleep Mode) Command must be shorter than the interval time
defined by LH (Wake-up Initializer Timer).
© 2007 MaxStream, Inc., Confidential & Proprietary ‐ All Rights Reserved
• Wake on serial port activity
• Typical power-down current: < 210 mA
• Typical Power-down Current: < 210 - 224 mA (when asleep)
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