XBIB-U Digi International/Maxstream, XBIB-U Datasheet - Page 22

• Manufacturer Part Number: XBIB-U
• Description: BOARD USB ZIGBEE MOD PRO
• Manufacturer: Digi International/Maxstream

Specifications of XBIB-U

• Design Resources: XBIB-U Shematic
• Accessory Type: Interface Board
• For Use With/related Products: XBee and XBee Pro Radios
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XBee/XBee‐PRO™ OEM RF Modules ‐ 802.15.4 ‐ v1.xAx [2007.05.031]
2.5.3. Sleep Mode
Pin/Host-controlled Sleep Modes
Sleep Modes enable the RF module to enter states of low-power consumption when not in use. In
order to enter Sleep Mode, one of the following conditions must be met (in addition to the module
having a non-zero SM parameter value):
Table 2‐04. Sleep Mode Configurations
The SM command is central to setting Sleep Mode configurations. By default, Sleep Modes are dis-
abled (SM = 0) and the module remains in Idle/Receive Mode. When in this state, the module is
constantly ready to respond to serial or RF activity.
Higher Voltages. Sleep Mode current consumption is highly sensitive to voltage. Voltages above
3.0V will cause much higher current consumption.
Table 2‐05. Sample Sleep Mode Currents
The transient current when waking from pin sleep (SM = 1 or 2) does not exceed the idle current
of the module. The current ramps up exponentially to its idle current.
Pin Hibernate (SM = 1)
Pin Hibernate Mode minimizes quiescent power (power consumed when in a state of rest or inac-
tivity). This mode is voltage level-activated; when Sleep_RQ is asserted, the module will finish any
transmit, receive or association activities, enter Idle Mode and then enter a state of sleep. The
module will not respond to either serial or RF activity while in pin sleep.
To wake a sleeping module operating in Pin Hibernate Mode, de-assert Sleep_RQ (pin 9). The
module will wake when Sleep_RQ is de-asserted and is ready to transmit or receive when the CTS
line is low. When waking the module, the pin must be de-asserted at least two 'byte times' after
CTS goes low. This assures that there is time for the data to enter the DI buffer.
Sleep Mode
Setting
Pin Hibernate
(SM = 1)
Pin Doze
(SM = 2)
Cyclic Sleep
(SM = 4 - 5)
© 2007 MaxStream, Inc.
• Sleep_RQ (pin 9) is asserted.
• The module is idle (no data transmission or reception) for the amount of time defined by the
• Pin/Host-controlled
• Typical power-down current: < 10 µA (@3.0 VCC)
• Wake-up time: 13.2 msec
Vcc (V)
2.8–3.0
ST (Time before Sleep) parameter. [NOTE: ST is only active when SM = 4-5.]
3.1
3.2
3.3
3.4
Transition into
Sleep Mode
Assert (high) Sleep_RQ
(pin 9)
Assert (high) Sleep_RQ
(pin 9)
Automatic transition to
Sleep Mode as defined by
the SM (Sleep Mode) and
ST (Time before Sleep)
parameters.
101uA
255uA
<3 µA
SM=1
32uA
8uA
<35uA
170uA
XBee
SM=2
37mA
48uA
83uA
Transition out of
Sleep Mode (wake)
De-assert (low) Sleep_RQ
De-assert (low) Sleep_RQ
Transition occurs after the
cyclic sleep time interval
elapses. The time interval
is defined by the SP
(Cyclic Sleep Period)
parameter.
SM=4,5
<34uA
240uA
100uA
36uA
49uA
Characteristics
Pin/Host-controlled /
NonBeacon systems
only / Lowest Power
Pin/Host-controlled /
NonBeacon systems
only / Fastest wake-up
RF module wakes in
pre-determined time
intervals to detect if RF
data is present / When
SM = 5, NonBeacon
systems only
130uA
310uA
SM=1
<4uA
12uA
45uA
Chapter 2 ‐ RF Module Operation
XBee-PRO
<34uA
115uA
260uA
SM=2
39uA
60uA
Related
Commands
(SM)
(SM)
(SM), SP, ST
SM=4,5
<34uA
120uA
290uA
Power
Consumption
< 10 µA (@3.0
VCC)
< 50 µA
< 50 µA
when sleeping
37uA
55uA
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