SI4322-A0-FT Silicon Laboratories Inc, SI4322-A0-FT Datasheet - Page 17

• Manufacturer Part Number: SI4322-A0-FT
• Description: IC RX FSK UNI 868/915MHZ 16TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4322-A0-FT

• Package / Case: 16-TSSOP
• Frequency: 868MHz, 915MHz
• Sensitivity: -104dBm
• Data Rate - Maximum: 256 kbps
• Modulation Or Protocol: FSK
• Applications: Remote Control, RKE, Security Systems
• Current - Receiving: 14mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Features: RSSI Equipped
• Voltage - Supply: 2.2 V ~ 3.8 V
• Operating Frequency: 433 MHz to 915 MHz
• Operating Supply Voltage: 2.2 V to 3.8 V
• Mounting Style: SMD/SMT
• Supply Current: 0.5 mA
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Modulation Type: FSK
• Product Depth (mm): 4.4mm
• Operating Supply Voltage (typ): 2.5/3.3V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FIFO Buffered Data Read
In this operating mode, incoming data are clocked into a 48 bit FIFO buffer. The receiver starts to fill up the FIFO when the Valid Data
Indicator (VDI) bit and/or the synchron word recognition circuit indicates potentially real incoming data. This prevents the FIFO from
being filled with noise and overloading the external microcontroller.
For further details see the Receiver Setting Command and the Output and FIFO Command.
Polling Mode:
The nFFS signal selects the buffer directly and its content could be clocked out through pin SDO by SCK. Set the FIFO IT level to 1. In
this case, as long as FFIT indicates received bits in the FIFO, the controller may continue to take the bits away. When FFIT goes low,
no more bits need to be taken. An SPI read command is also available.
Interrupt Controlled Mode:
The user can define the FIFO level (the number of received bits) which will generate the nFFIT when exceeded. The status bits report
the changed FIFO status in this case.
FIFO Read Example with FFIT Polling:
During FIFO access the f
Power Saving Modes
The different operating modes of the chip depend on the following control bits:
nFFS**
SDO
nSEL*
SCK
FFIT
FIFO OUT
0
FO+1
SCK
1
FIFO read out
cannot be higher than f
Operating Mode
FO+2
2
Standby
Active
Sleep
Idle
FO+3
3
NOTE:
*nSEL is used to activate SDO
**nFFS is used to select FIFO
FO+4
4
Setting Comand)
(Configuration
ref
/4, where f
eb or et
X
X
1
0
ref
is the crystal oscillator frequency.
(Receiver Setting
Command
en
1
0
0
0
Setting Command)
(Configuration
ex
1
1
0
0
Si4322
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