SX1210I084T Semtech, SX1210I084T Datasheet - Page 33

• Manufacturer Part Number: SX1210I084T
• Description: IC SINGLE-CHIP RECEIVER 32-TQFN
• Manufacturer: Semtech

Specifications of SX1210I084T

• Frequency: 863MHz ~ 960MHz
• Sensitivity: -113dBm
• Data Rate - Maximum: 200 kbps
• Modulation Or Protocol: FSK, OOK
• Applications: Alarm Systems, Communication Systems
• Current - Receiving: 3mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.1 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -

Table 14 below summarizes the status of the FIFO when switching between different modes
Table 14: Status of FIFO when Switching Between Different Modes of the Chip
Sync word recognition (also called Pattern recognition in previous products) is activated by setting
RXParam_Sync_on. The bit synchronizer must also be activated.
The block behaves like a shift register; it continuously compares the incoming data with its internally programmed
Sync word and asserts the Sync IRQ source on each occasion that a match is detected. This is illustrated in Figure
26.
During the comparison of the demodulated data, the first bit received is compared with bit 7 (MSB) of byte at
address 22 and the last bit received is compared with bit 0 (LSB) of the last byte whose address is determined by
the length of the Sync word.
Rev 2– Sept 8
ADVANCED COMMUNIC
From
Stby
Rx
Any
5.2.3. Sync Word Recognition
th
DCLK
Rx DATA
(NRZ)
, 2008
SYNC
5.2.2.4. FIFO Clearing
5.2.3.1. Overview
To
Rx
Stby
Sleep
Sync_value[x]
Bit N-x =
ATIONS & SENSING
Cleared
Cleared
IRQ source
FIFO Status
Not cleared
Figure 25: FIFO Threshold IRQ Source Behavior
1
0
Rx & Stby
Figure 26: Sync Word Recognition
Sync_value[1] Sync_value[0]
Comments
In Packet & Buffered modes FIFO can be read in Stby after Rx
Bit N-1 =
Page 33 of 73
B
Bit N =
B+1
# of bytes in FIFO
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