SM1211E915 Semtech, SM1211E915 Datasheet - Page 37

• 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

Note that when reading more than one register successively, it is not compulsory to toggle NSS_CONFIG back
high between two read sequences. The bytes are alternatively considered as address and value.
To write bytes into the FIFO the timing diagram below should be carefully followed by the uC.
Note that it is compulsory to toggle NSS_DATA back high between each byte written.
The byte is pushed into the FIFO on the rising edge of NSS_DATA
Rev 7 – Sept 2
NSS_CONFIG (In)
SCK (In)
MOSI (In)
MISO (Out)
ADVANCED COMMUNICATIONS & SENSING
Write Byte (before/during Tx)
SCK (In)
MOSI (In)
MISO (Out)
NSS_DATA (In)
HZ
(input)
nd
, 2008
HZ
(input)
5.2.1.3. SPI Data
start
1
x
x
D1(7)
1
rw
D1(6) D1(5) D1(4)
2
x
2
x
A(4) A(3) A(2) A(1)
3
x
3
x
Figure 29: Write Bytes Sequence (ex: 2 bytes)
1
st
4
x
Address = A1
byte written
4
x
x
Figure 28: Read Register Sequence
D1(3) D1(2) D1(1)
5
x
5
x
6
x
6
x
7
x
A(0)
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7
D1(0)
x
8
x
stop
8
(input)
x
HZ
D(7) D(6) D(5) D(4) D(3) D(2) D(1)
x
9
D2(7) D2(6) D2(5)
x
1
10
x
2
x
11
x
3
x
Current value at
address A1
2
nd
D2(4)
12
x
4
x
byte written
D2(3) D2(2) D2(1)
5
x
13
x
6
x
14
x
7
x
15
x
D2(0)
8
x
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SX1211
16
D(0)
x
x
HZ
(input)
HZ
(input)