SM1211E915 Semtech, SM1211E915 Datasheet - Page 41

• Manufacturer Part Number: SM1211E915
• Description: Dev Kit Accessory
• Manufacturer: Semtech

Specifications of SM1211E915

• Modulation Type: FSK, OOK
• Data Rate Max: 200Kbps
• Frequency Range: 902MHz To 928MHz
• Supply Voltage Range: 2.1V To 3.6V
• Module Interface: SPI
• Supply Current: 25mA
• Accessory Type: RF Module
• Sensitivity: -105dBm
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: TQFN EP
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Sensitivity (dbm): -105dBm
• Rohs Compliant: NA
• Lead Free Status / RoHS Status: na
• Lead Free Status / RoHS Status: na

As illustrated in Figure 34, in Continuous mode the NRZ data to (from) the (de)modulator is directly accessed by
the uC on the bidirectional DATA pin (20). The SPI Data, FIFO and packet handler are thus inactive.
In Tx mode, a synchronous data clock for an external uC is provided on IRQ_1 pin. Its timing with respect to the
data is illustrated in Figure 35. DATA is internally sampled on the rising edge of DCLK so the uC can change logic
state anytime outside the greyed out setup/hold zone.
The use of DCLK is compulsory in FSK and optional in OOK.
Rev 7 – Sept 2
ADVANCED COMMUNICATIONS & SENSING
5.3. Continuous Mode
Data
Datapath
5.3.1. General Description
5.3.2. Tx Processing
Tx/Rx
nd
Rx
, 2008
DATA (NRZ)
DCLK
SYNC
RECOG.
Figure 34: Continuous Mode Conceptual View
Figure 35: Tx Processing in Continuous Mode
SX1211
T_DATA
CONTROL
T_DATA
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CONFIG
SPI
NSS_CONFIG
MISO
SCK
MOSI
IRQ_0
IRQ_1(DCLK)
DATA
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SX1211