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| 型號： | XIB-R |
| 廠商： | Digi International/Maxstream |
| 文件頁數(shù)： | 12/36頁 |
| 文件大?。?/td> | 826K |
| 描述： | BOARD INTERFACE RS232/485 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 附件類型： | 接口板 |
| 適用于相關(guān)產(chǎn)品： | XStream 和 Xcite 收音機 |
| 其它名稱： | Q2231853 |
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9XCite"燨EM燫F燤odule?燩roduct燤anual爒2.1燵2007.01.04]
2007燤axStream,營nc.
牋牋?2
2.2.4. Sleep Modes
Software Sleep
Sleep Modes enable the module to enter states of low-power consumption when not in use. Three
software Sleep Modes are supported:
" Pin Sleep (Host Controlled)
" Serial Port Sleep (Wake on Serial Port activity)
" Cyclic Sleep (Wake on RF activity)
In order to enter Sleep Mode, one of the following conditions must be met (in addition to the mod-
ule having a non-zero SM parameter value):
Once in Sleep Mode, the radio modem does not transmit or receive data until it first returns to Idle
Mode. The return into Idle Mode is triggered by the de-assertion of the Sleep pin or the arrival of a
serial byte through Data In pin.
The following table lists MaxStream's Sleep Mode configurations and the requirements needed to
transition into and out of Sleep Mode:
Table?01. Sleep燤ode燙onfigurations
Pin Sleep (SM = 1)
" Pin/Host-controlled
<Lowest Power Configuration> In order to achieve this low-power state, Pin 2 must be asserted
(high). The modem remains in Pin Sleep until the Sleep pin is de-asserted. The modem will com-
plete a transmission or reception before activating Pin Sleep.
After enabling Pin Sleep (SM (Sleep Mode) Parameter = 1), Pin 2 controls whether the XCite Mod-
ule is active or in Sleep Mode. When Pin 2 is asserted (high), the modem transitions to Sleep Mode
and remains in its lowest power-consuming state until the Sleep pin is de-asserted. The XCite
Module requires 40ms to transition from Sleep Mode to Idle Mode. Pin 2 is only active if the
modem is setup to operate in this mode; otherwise the pin is ignored. Once in Pin Sleep Mode,
CTS
is de-asserted (high), indicating that data should not be sent to the modem. The PWR pin is
also de-asserted (low) when the modem is in Pin Sleep Mode
Note: The module will complete a transmission or reception before activating Pin Sleep.
1. The module is idle (no data transmission or reception) for the amount of time defined by
the ST (Time before Sleep) parameter.
2. SLEEP pin is asserted.
Sleep Mode
Setting
Transition into
Sleep Mode
Transition out of
Sleep Mode
Related
Commands
Power
Consumption
Pin Sleep
(SM=1)
Microcontroller can shut down
and Wake-up modules. Assert
(high) Sleep Pin (Pin 2).
Note: Module will complete a
transmission or reception before
activating Pin Sleep.
De-Assert (low) Sleep
pin (Pin 2)
SM
20 礎(chǔ)
Serial Port Sleep
(SM=2)
Automatic transition into Sleep
Mode after user-defined period
of inactivity (no transmitting or
receiving). Period of inactivity set
using ST Command.
When serial byte is
received on the DI pin
(Pin 4)
SM, ST
1 mA
Cyclic Sleep
(SM=3-8)
Transitions into and out of Sleep Mode in cycles (user-
selectable wake-up interval of time (?second to 16
seconds) set by SM Command). The Cyclic Sleep interval
time must be shorter than Wake-up Initializer Timer (set by
LH Command).
(Can be forced into Idle Mode using Sleep Pin if PW (Pin
Wake-up) Command is issued.)
HT, LH, PW, SM, ST
typically 76 礎(chǔ)
(when sleeping)
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