XB24-PDK Digi International/Maxstream, XB24-PDK Datasheet - Page 14

• Manufacturer Part Number: XB24-PDK
• Description: KIT DEV PRO ZIGBEE
• Manufacturer: Digi International/Maxstream
• Series: XBee™r
• Type: 802.15.4/Zigbeer

Specifications of XB24-PDK

• Frequency: 2.4GHz
• For Use With/related Products: Xbee-PRO Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XBee®/XBee‐PRO® RF Modules ‐ 802.15.4 ‐ v1.xEx [2009.09.23]
API Support
Sleep Support
DIO Pin Change Detect
Sample Rate (Interval)
I/O data is sent out the UART using an API frame. All other data can be sent and received using
Transparent Operation [refer to p11] or API framing if API mode is enabled (AP > 0).
API Operations support two RX (Receive) frame identifiers for I/O data (set 16-bit address to
0xFFFE and the module will do 64-bit addressing):
The API command header is the same as shown in the “RX (Receive) Packet: 64-bit Address” and
“RX (Receive) Packet: 64-bit Address” API types [refer to p63]. RX data follows the format
described in the I/O Data Format section [p13].
Applicable Commands: AP (API Enable)
Automatic wakeup sampling can be suppressed by setting SO bit 1.When an RF module wakes, it
will always do a sample based on any active ADC or DIO lines. This allows sampling based on the
sleep cycle whether it be Cyclic Sleep (SM parameter = 4 or 5) or Pin Sleep (SM = 1 or 2). To
gather more samples when awake, set the IR (Sample Rate) parameter.
For Cyclic Sleep modes: If the IR parameter is set, the module will stay awake until the IT (Sam-
ples before TX) parameter is met. The module will stay awake for ST (Time before Sleep) time.
Applicable Commands: IR (Sample Rate), IT (Samples before TX), SM (Sleep Mode), IC (DIO
Change Detect), SO (Sleep Options)
When “DIO Change Detect” is enabled (using the IC command), DIO lines 0-7 are monitored.
When a change is detected on a DIO line, the following will occur:
Note: Change detect will not affect Pin Sleep wake-up. The D8 pin (DTR/Sleep_RQ/DI8) is the only
line that will wake a module from Pin Sleep. If not all samples are collected, the module will still
enter Sleep Mode after a change detect packet is sent.
Applicable Commands: IC (DIO Change Detect), IT (Samples before TX)
NOTE: Change detect is only supported when the Dx (DIOx Configuration) parameter equals 3,4 or 5.
The Sample Rate (Interval) feature allows enabled ADC and DIO pins to be read periodically on
modules that are not configured to operate in Sleep Mode. When one of the Sleep Modes is
enabled and the IR (Sample Rate) parameter is set, the module will stay awake until IT (Samples
before TX) samples have been collected.
Once a particular pin is enabled, the appropriate sample rate must be chosen. The maximum sam-
ple rate that can be achieved while using one A/D line is 1 sample/ms or 1 KHz (Note that the
modem will not be able to keep up with transmission when IR & IT are equal to “1” and that con-
figuring the modem to sample at rates greater than once every 20ms is not recommended).
Applicable Commands: IR (Sample Rate), IT (Samples before TX), SM (Sleep Mode)
1.
2.
© 2009 Digi Internatonal, Inc.
• 0x82 for RX (Receive) Packet: 64-bit address I/O
• 0x83 for RX (Receive) Packet: 16-bit address I/O
An RF packet is sent with the updated DIO pin levels. This packet will not contain any ADC
samples.
Any queued samples are transmitted before the change detect data. This may result in
receiving a packet with less than IT (Samples before TX) samples.
14