XTH9-MI-128 Digi International/Maxstream, XTH9-MI-128 Datasheet - Page 59

• Manufacturer Part Number: XTH9-MI-128
• Description: MODULE RF 900MHZ 1W 115K W/MMCX
• Manufacturer: Digi International/Maxstream

Specifications of XTH9-MI-128

• Frequency: 900MHz
• Data Rate - Maximum: 230kbps
• Modulation Or Protocol: FHSS, FSK
• Power - Output: 30dBm
• Sensitivity: -110dBm
• Voltage - Supply: 3.3V, 5V
• Current - Receiving: 80mA
• Current - Transmitting: 260mA
• Data Interface: Connector, 2 x 10 Header
• Antenna Connector: MMCX
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -

XTend™ RF Module ‐ Product Manual v2.x6x
RO
RT
SB
API Operation
API Frame Specifications
Packetization Timeout. Set/Read the
number of character times with no UART data
before a packet is created for RF output
(assuming UART data was received prior to
the idle time). If RO = 0, it is ignored and no
data will be transmitted until RB characters
are in the DO buffer.
GPI1 Configuration. Set/Read the behavior
of the GPI1 pin (pin 10).
Stop Bits. Set/Read the number of stop bits in
the data packet.
API Operation (AP parameter = 1)
API operation requires that communication with the module be done through a structured inter-
face (data is communicated in frames in a defined order). The API specifies how commands, com-
mand responses and module status messages are sent and received from the module using a
UART data Frame.
Two API modes are supported and both can be enabled using the AP (API Enable) command. Use
the following AP parameter values to configure the module to operate in a particular mode:
API modes are disabled.
Any data received prior to the start delimiter is silently discarded. If the frame is not received cor-
rectly or if the checksum fails, the data is silently discarded.
When this API mode is enabled (AP = 1), the UART data frame structure is defined as follows:
Figure 5‐01. UART Data Frame Structure
© 2010 Digi Internatonal, Inc.
"AP = 0 (default): Transparent Operation (UART Serial line replacement)
• AP = 1: API Operation
• AP = 2: API Operation (with escaped characters)
0 - 0xFFFF 
[x UART character time]
0 – 2
0 = No RTS flow control
flow control
0 – 1
0 = 1 stop bit 
1 = 2 stop bits
2 = RTS
Serial
Interfacing
Serial
Interfacing
Serial
Interfacing
2
1
1
3
0
0
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