XTH9-MI-128 Digi International/Maxstream, XTH9-MI-128 Datasheet - Page 14

• 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
Shutdown Mode
Sleep Mode
Hardware Sleep
Software Sleep
Figure 2‐07. Receive Mode Data Flow
* Refer to the ‘Address Recognition’ sec‐
tion for more information regarding
address recognition.
The module returns to Idle Mode
when valid RF data is no longer
detected or after an error is
detected in the received RF data. If
serial data is stored in the DI buf-
fer while the module is in Receive
Mode, the serial data will be trans-
mitted after the module is finished
receiving data and returns to Idle
Mode.
For applications where power consumption must be kept to a minimum during idle periods, Shut-
down Mode offers the lowest power mode available to the module.
When the SHDN pin (pin 7) is driven low, the module is forced into shutdown mode. Any commu-
nication in progress (transmit or receive) will be halted and any buffered data will be lost. For any
other mode of operation, SHDN must be driven or pulled high. While in shutdown mode, the mod-
ule's VCC pin draws 5 µA (typical).
Immediately after the SHDN pin changes state from low to high, the module resets. After reset,
there is a delay that must be observed. Delay time is <100ms.
While SHDN pin is driven low, the following pins are set to high impedance by the module: DCD,
TX_PWR, RX LED, DO and CTS (See pin signal descriptions, p6). The SHDN line (also used for
RSSI indication) is driven low during shutdown.
The following input pins may continue to be driven by external circuitry when in shutdown mode:
PIN_PWR_DWN, RTS, DI and SHDN.
Note: Because the DO pin also goes high impedance, if the XTend RF Module is connected to a pro-
cessor, the UART receive pin could be floating. A weak pull-up should be placed between the module
and the microcontroller so that data is not interpreted as being transmitted to the microprocessor.
Sleep Modes enable the module to enter states of low-power consumption when not in use. Three
software Sleep Modes are supported:
© 2010 Digi Internatonal, Inc.
• Pin Sleep (Host Controlled)
• Serial Port Sleep (Wake on Serial Port activity)
• Cyclic Sleep (Wake on RF activity)
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