XBP24-PKI-001-RA Digi International/Maxstream, XBP24-PKI-001-RA Datasheet - Page 51

• 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
Start Delimiter
(Byte 1)
0x7E
4.4.2. API Types
Checksum
Modem Status
Data bytes that need to be escaped:
Note: In the above example, the length of the raw data (excluding the checksum) is 0x0002 and
the checksum of the non-escaped data (excluding frame delimiter and length) is calculated as:
0xFF - (0x23 + 0x11) = (0xFF - 0x34) = 0xCB.
To test data integrity, a checksum is calculated and verified on non-escaped data.
To calculate: Not including frame delimiters and length, add all bytes keeping only the lowest 8
bits of the result and subtract from 0xFF.
To verify: Add all bytes (include checksum, but not the delimiter and length). If the checksum is
correct, the sum will equal 0xFF.
Frame data of the UART data frame forms an API-specific structure as follows:
Figure 4‐05. UART Data Frame & API‐specific Structure:
The cmdID frame (API-identifier) indicates which API messages will be contained in the cmdData
frame (Identifier-specific data). Refer to the sections that follow for more information regarding
the supported API types. Note that multi-byte values are sent big endian.
API Identifier: 0x8A
RF modem status messages are sent from the modem in response to specific conditions.
Figure 4‐06. Modem Status Frames
Example - Raw UART Data Frame (before escaping interfering bytes):
0x11 needs to be escaped which results in the following frame:
0x7E 0x00 0x02 0x23 0x7D 0x31 0xCB
• 0x7E – Frame Delimiter
• 0x7D – Escape
• 0x11 – XON
• 0x13 – XOFF
MSB
(Bytes 2-3)
0x7E 0x00 0x02 0x23 0x11 0xCB
Start Delimiter
Length
0x7E
LSB
API Identifier
MSB
cmdID
Length
LSB
API Identifier
0x8A
API-specific Structure
API -specific Structure
0 = Hardware reset
1 = Watchdog timer reset
2 = Associated
3 = Disassociated
4 = Synchronization Lost
5 = Coordinator realignment
6 = Coordinator started
Frame Data
(Bytes 4- n)
Frame Data
( Beacon -enabled only )
Identifier-specific Data
Status (Byte 5)
Identifier-specific Data
cmdData
cmdData
Checksum
1 Byte
(Byte n + 1)
Checksum
1 Byte
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