XC09-009PKC-R Digi International/Maxstream, XC09-009PKC-R Datasheet - Page 12

• Manufacturer Part Number: XC09-009PKC-R
• Description: MODEM RF 900MHZ RS232/485
• Manufacturer: Digi International/Maxstream
• Series: 9XCite™r

Specifications of XC09-009PKC-R

• Frequency: 900MHz
• Data Rate - Maximum: 9.6kbps
• Modulation Or Protocol: FHSS, FSK
• Power - Output: 6dBm
• Sensitivity: -108dBm
• Voltage - Supply: 2.85 V ~ 5.5 V
• Current - Receiving: 45mA
• Current - Transmitting: 55mA
• Data Interface: Connector, Female DB-9
• Antenna Connector: RP-SMA
• Operating Temperature: 0°C ~ 70°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -

9XCite‐PKG‐R™ RS‐232/485 RF Modem – Product Manual v2.1 [2007.01.04]
3. RF Modem Operation
3.1. Serial Communications
3.1.1. RS-232 and RS-485/422 Data Flow
3.1.2. Serial Data
The XCite RF Modem can enable a host device to communicate wirelessly. To transmit, the host
device simply sends serial data to the XCite RF Modem pins. The RF modem then converts the data
into FCC-approved RF data. Once transmitted, the RF data can be detected by receiving XCite RF
Modems, checked for integrity and then sent to a receiving device.
Figure 3‐01. Data Flow in RS‐232 and RS‐485/422 environments.
(Low‐asserted signals distinguished with a horizontal line over signal name.)
Data enters the MaxStream RF modem through the DI Pin as an asynchronous serial signal. The
signal should idle high when no data is being transmitted.
The UART performs tasks (such as timing and parity checking) needed for communication. Serial
communication consists of two UARTs which must be configured with compatible parameters
(Baud rate, parity, start bits, stop bits, data bits) to have successful communication. Each data
packet consists of a start bit (low), 8 data bits (least significant bit first) and a stop bit (high). The
following figure illustrates the serial bit pattern of data passing through the modem.
Figure 3‐02. Serial (UART) data packet 0x1F (decimal ʺ31ʺ) as transmitted through the XCite Module
Data Format is 8‐N‐1 (8 bits ‐ No Parity ‐ 1 Stop Bit)
In the example above, the MaxStream RF modem transfer 8 bits over-the-air [Selectable using BI
(Number of Bits) Parameter]. Start and stop bits of the UART signal are not transmitted over-the-
air, but are regenerated by the receiving modem
© 2007 MaxStream, Inc.
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