9XTend-PKG-R™ RS-232/485 RF Modem

9XTend‐PKG‐R RS‐232/485 RF Modem – Product Manual v1.2.43.2.4. Sleep ModeSoftware SleepSleep Modes enable the XTend Modem to operate at minimal power consumption when not inuse. Three Sleep Mode options are available:• Host Controlled (Pin Sleep)• Wake on Serial Port activity (Serial Port Sleep)• Wake on RF activity (Cyclic Sleep)For the modem to transition into Sleep Mode, SM (Sleep Mode) Parameter must have a non-zerovalue and one of the following must occur:1. The modem is idle (no data transmission or reception) for a user-defined period of time [SeeST (Time before Sleep) Command][OR]2. GPI2 pin is asserted [GPI2 is equivalent to DTR (Data-Terminal-Ready) under RS-232operation. Refer to the RS-232 Operation [p7] section for more information.]While in Sleep Mode, the modem will not transmit or receive data until the modem first shiftsback to Idle Mode. The return to Idle Mode is triggered by the de-assertion of GPI2 or the arrivalof a serial byte through the DI pin. Sleep Mode is enabled and disabled using SM Command.Table 3‐02. Summary of Sleep Mode ConfigurationsSleep ModeSettingPin Sleep(SM=1)Serial Port Sleep(SM=2)Cyclic Sleep(SM=4-8)Transition intoSleep ModeHost can shut down andwake modems. Assert GPI2(SLEEP) pin.Note: The module willcomplete a transmission orreception before activatingPin Sleep.Automatic transition intoSleep Mode after userdefinedperiod of inactivity(no transmitting orreceiving). Period ofinactivity set using STCommand.Transition out ofSleep ModeDe-Assert GPI2 (SLEEP)pin.When serial byte is receivedon the DI pin.Transitions into and out of Sleep Mode in cycles (userselectablewake-up interval of time set by SM Command).The Cyclic Sleep interval time must be shorter than “WakeupInitializer Timer” (set by LH Command).(Can be forced into Idle Mode using GPI2 (SLEEP) pin ifPW (Pin Wake-up) Command is issued.)RelatedCommandsSMSM, STHT, LH, PW, SM, STPowerConsumptionTypically 17 mATypically 45 mATypically 25 mA(when sleeping, SM=4 ,1 sec, @120K baud)For more information about Sleep Modes, refer to the individual commands listed in “Related Commands”column of the table. SM Command is the best starting point.3.2.5. ShutdownHardware SleepShutdown Mode offers the lowest power mode available to MaxStream modem users (< 1 µA).This mode is not supported by the stand-alone XTend RF Modem, but is available through theOEM RF Module that is mounted inside the stand-alone XTend RF Modem.Contact MaxStream Technical Support for more information.© 2005 MaxStream, Inc. Confidential and Proprietary 17