XB24-BPDK Digi International/Maxstream, XB24-BPDK Datasheet - Page 44

• Manufacturer Part Number: XB24-BPDK
• Description: KIT DEVELOPMENT XBEE SERIES 2
• Manufacturer: Digi International/Maxstream
• Series: XBee™r
• Type: 802.15.4/Zigbeer

Specifications of XB24-BPDK

• Frequency: 2.4GHz
• For Use With/related Products: XBee™ Series 2 Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XBee ZNet 2.5/XBee‐PRO ZNet 2.5 ZigBee OEM RF Modules v1.x4x
4.5.1. IO Samples
When an IO sample is taken, the collected data is assembled into a packet and either sent out the
uart or transmitted to a remote device. The IO sample is formatted in the following manner:
Table 4‐08.
The sampled data set will include 2 bytes of digital IO data only if one or more IO lines on the
device are configured as digital IO. If no pins are configured as digital IO, these 2 bytes will be
omitted.
The digital IO data is only relevant if the same bit is enabled in the digital IO mask as shown in the
following figure:
Analog samples are returned as 10-bit values. The analog reading is scaled such that 0x0000
represents 0V, and 0x3FF = 1.2V. (The analog inputs on the module cannot read more than
1.2V.) Analog samples are returned in order starting with AIN0 and finishing with AIN3, and the
supply voltage. Only enabled analog input channels return data as shown in the figure below.
To convert the A/D reading to mV, do the following:
AD(mV)= (ADIO reading/0x3FF)*1200mV
The reading in the sample frame represent voltage inputs of 1144.9 and 342.5mV for ADIO0 and
ADIO1 respectively.
1
2
1
Variable Sampled Data Set
Bytes
© 2008 Digi International, Inc.
Sample Sets
Digital Channel Mask
Analog Channel Mask
Name
Number of sample sets in the packet. (Always set to 1.)
Indicates which digital IO lines have sampling enabled. Each bit corresponds to one
digital IO line on the module.
For example, a digital channel mask of 0x002F means DIO0,1,2,3, and 5 are enabled
as digital IO.
Indicates which lines have analog inputs enabled for sampling. Each bit in the analog
channel mask corresponds to one analog input channel.
A sample set consisting of 1 sample for each enabled ADC and/or DIO channel.
If any digital IO lines are enabled, the first two bytes of the data set indicate the state
of all enabled digital IO. Only digital channels that are enabled in the Digital Channel
Mask bytes have any meaning in the sample set. If no digital IO are enabled on the
device, these 2 bytes will be omitted.
Following the digital IO data (if any), each enabled analog channel will return 2 bytes.
The data starts with AIN0 and continues sequentially for each enabled analog input
channel up to AIN3, and the supply voltage (if enabled) at the end.
• bit 0 = AD0/DIO0
• bit 1 = AD1/DIO1
• bit 2 = AD2/DIO2
• bit 3 = AD3/DIO3
• bit 4 = DIO4
• bit 5 = ASSOC/DIO5
• bit 6 = RTS/DIO6
• bit 7 = CTS/GPIO7
• bit 8 = N/A
• bit 9 = N/A
• bit 10 = RSSI/DIO10
• bit 11 = PWM/DIO11
• bit 12 = CD/DIO12
•
•
•
•
•
bit 0 = AD0/DIO0
bit 1 = AD1/DIO1
bit 2 = AD2/DIO2
bit 3 = AD3/DIO3
bit 7 = Supply Voltage
Description
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