XBP24-PKI-001-RA Digi International/Maxstream, XBP24-PKI-001-RA Datasheet - Page 10

• Manufacturer Part Number: XBP24-PKI-001-RA
• Description: MODULE 802.15.4 RS-232 ANT
• Manufacturer: Digi International/Maxstream
• Series: XBEE-PRO™r

Specifications of XBP24-PKI-001-RA

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: Home/Building Automation, Industrial Control, ZigBee™
• Power - Output: 0dBm
• Sensitivity: -92dBm
• Voltage - Supply: 2.8 V ~ 3.4 V
• Current - Receiving: 55mA
• Data Interface: Connector, Female DB-9
• Antenna Connector: RP-SMA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Memory Size: -
• Current - Transmitting: -
• Other names: Q3255595

© 2008 Digi International, Inc.
XBee‐PRO PKG‐R® RS‐232 RF Modem – 802.15.4 ‐ Product Manual v1.xAx
3.1.3. Transparent Operation
3.1.4. API Operation
Serial-to-RF Packetization
By default, XBee-PRO RF Modems operate in Transparent Mode. When operating in this mode, the
modems act as a serial line replacement - all UART data received through the DI pin is queued up
for RF transmission. When RF data is received, the data is sent out the DO pin.
Data is buffered in the DI buffer until one of the following causes the data to be packetized and
transmitted:
If the modem cannot immediately transmit (for instance, if it is already receiving RF data), the
serial data is stored in the DI Buffer. The data is packetized and sent at any RO timeout or when
100 bytes (maximum packet size) are received.
If the DI buffer becomes full, hardware or software flow control must be implemented in order to
prevent overflow (loss of data between the host and modem).
API (Application Programming Interface) Operation is an alternative to the default Transparent
Operation. The frame-based API extends the level to which a host application can interact with the
networking capabilities of the modem.
When in API mode, all data entering and leaving the modem is contained in frames that define
operations or events within the modem.
Transmit Data Frames (received through the DI (Data In) pin) include:
Receive Data Frames (sent out the Data Out) include:
The API provides alternative means of configuring modems and routing data at the host
application layer. A host application can send data frames to the modem that contain address and
payload information instead of using command mode to modify addresses. The modem will send
data frames to the application containing status packets; as well as source, RSSI and payload
information from received data packets.
The API operation option facilitates many operations such as the examples cited below:
-> Transmitting data to multiple destinations without entering Command Mode
-> Receive success/failure status of each transmitted RF packet
-> Identify the source address of each received packet
• RF Transmit Data Frame
• Command Frame (equivalent to AT commands)
• RF-received data frame
• Command response
• Event notifications such as reset, associate, disassociate, etc.
1. No serial characters are received for the amount of time determined by the RO (Pack-
2.The maximum number of characters that will fit in an RF packet (100) is received.
3.The Command Mode Sequence (GT + CC + GT) is received. Any character buffered in
etization Timeout) parameter. If RO = 0, packetization begins when a character is
received.
the DI buffer before the sequence is transmitted.
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