XTH9-MI-128 Digi International/Maxstream, XTH9-MI-128 Datasheet - Page 32

• 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
PL (TX Power Level) Command
PW (Pin Wake-up) Command
RB (Packetization Threshold) Command
Changes to the PK parameter may have a secondary effect on the RB (Packetization Threshold)
parameter. RB must always be less than or equal to PK. If PK is changed to a value that is less
than the current value of RB, the RB value is automatically lowered to be equal to PK.
* When BR = 0 (9600 baud), the maximum PK value is 0x100 (256d). When BR = 1 (115,200
baud), the maximum PK value is 0x800 (2048d).
<RF Interfacing> The PL command is used to set/
read the power level at which the RF module
transmits data
<Sleep (Low Power)> Under normal operation, an
RF module in Cyclic Sleep Mode cycles from an
active state to a low-power state at regular inter-
vals until data is ready to be received. If the PW
parameter is set to 1, the SLEEP pin (pin 8) can
be used to awaken the module from Cyclic Sleep.
When the SLEEP Pin is de-asserted (low), the
module will be fully operational and will not go
into Cyclic Sleep.
Once the SLEEP pin is asserted, the module will
remain active for the period of time specified by
the ST (Time before Sleep) parameter and will
return to Cyclic Sleep Mode (if no data is ready to
be transmitted). PW Command is only valid if Cyclic Sleep has been enabled.
<Serial Interfacing> The RB command is used to
set/read the character threshold value.
RF transmission begins after data is received in
the DI Buffer and either of the following criteria is
met:
If PK (Max. RF Packet Size) is lowered below the
value of RB, RB is automatically lowered to match the PK value. If (RO = 0), RB bytes must be
received before beginning transmission.
Note: RB and RO criteria only apply to the first packet of a multi-packet transmission. If data
remains in the DI Buffer after the first packet, transmissions will continue in a streaming manner
until there is no data left in the DI Buffer (UART receive buffer).
© 2010 Digi Internatonal, Inc.
• RB characters received by the UART
• RO character times of silence detected on the
UART receive lines (after receiving at least 1
Byte of data)
AT Command: ATPL
Binary Command: 0x3A (58 decimal)
Parameter Range: 0 - 4
Default Parameter Value: 4
Number of bytes returned: 1
AT Command: ATPW
Binary Command: 0x1D (29 decimal)
Parameter Range: 0 - 1
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: SM (Sleep Mode), ST
(Time before Sleep)
AT Command: ATRB
Binary Command: 0x20 (32 decimal)
Parameter Range:0 - PK parameter value
Default Parameter Value: 0x800 Bytes
Number of bytes returned: 2
Related Commands: BR (RF Data Rate), PK (RF
Packet Size), RO (Packetization Timeout)
Parameter
Parameter
0
1
2
3
4
0
1
(up to 0x800 Bytes)
1000 mW (1 Watt)
Configuration
Configuration
Disabled
100 mW
500 mW
Enabled
10 mW
1 mW
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