XBP09-XC009-DK Digi International, XBP09-XC009-DK Datasheet - Page 15

• Manufacturer Part Number: XBP09-XC009-DK
• Description: KIT STARTER XBEE PRO 900MHZ
• Manufacturer: Digi International
• Series: XBEE-PRO™r
• Type: Transceiver, XBeePror

Specifications of XBP09-XC009-DK

• Frequency: 900MHz
• Wireless Frequency: 900 MHz
• Operating Voltage: 3.3 V
• Output Power: 100 mW
• Antenna: U.FL, RPSMA, Whip
• Operating Temperature Range: - 40 C to + 85 C
• For Use With/related Products: Xbee-PRO Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 602-1133; Q4227731; XBP09-XC009-DK

XBee‐PRO® XSC OEM RF Modules
Once in Pin Sleep Mode, CTS is de-asserted (high), indicating that data should not be sent to the
module. The PWR pin is also de-asserted (low) when the module is in Pin Sleep Mode.
Note: The module will complete a transmission or reception before activating Pin Sleep.
Cyclic Sleep (SM = 3-8)
Cyclic Sleep is the Sleep Mode in which the XBee module enters into a low-power state and
awakens periodically to determine if any transmissions are being sent.
When Cyclic Sleep settings are enabled, the XBee module goes into Sleep Mode after a user-
defined period of inactivity (no transmission or reception on the RF channel). The user-defined
period is determined by ST (Time before Sleep) Command.
While the module is in Cyclic Sleep Mode, CTS is de-asserted (high) to indicate that data should
not be sent to the module during this time. When the module awakens to listen for data, CTS is
asserted and any data received on the DI Pin is transmitted. The PWR pin is also de-asserted (low)
when the module is in Cyclic Sleep Mode.
The module remains in Sleep Mode for a user-defined period of time ranging from 0.5 seconds to
16 seconds (SM Parameters 3 through 8). After this interval of time, the module returns to Idle
Mode and listens for a valid data packet for 100 ms. If the module does not detect valid data (on
any frequency), the module returns to Sleep Mode. If valid data is detected, the module
transitions into Receive Mode and receives incoming RF packets. The module then returns to Sleep
Mode after a Period of inactivity that is determined by ST "Time before Sleep" Command.
The module can also be configured to wake from cyclic sleep when SLEEP (pin 9) is de-asserted
(low). To configure a module to operate in this manner, PW (Pin Wake-up) Command must be
issued. Once SLEEP is de-asserted, the module is forced into Idle Mode and can begin transmitting
or receiving data. It remains active until no data is detected for the period of time specified by the
ST Command, at which point it resumes its low-power cyclic state.
Note: The cyclic interval time defined by SM (Sleep Mode) Command must be shorter than the
interval time defined by LH (Wake-up Initializer Timer).
For example: If SM=4 (Cyclic 1.0 second sleep), the LH Parameter should equal 0x0B ("1.1"
seconds). With these parameters set, there is no risk of the receiving module being asleep for the
duration of wake-up initializer transmission. "Cyclic Scanning" explains in further detail the
relationship between "Cyclic Sleep" and "Wake-up Initializer Timer"
Cyclic Scanning. Each RF transmission consists of an RF Initializer and payload. The wake-up
initializer contains initialization information and all receiving modules must wake during the wake-
up initializer portion of data transmission in order to be synchronized with the transmitting module
and receive the data.
Figure 2‐09. Correct Configuration (LH > SM)
Length of the wake‐up initializer exceeds the time interval of Cyclic Sleep. The receiver is guaranteed to detect
the wake‐up initializer and receive the accompanying payload data.
Figure 2‐010.Incorrect Configuration (LH < SM)
© 2008 Digi International, Inc.
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