SI4031-B1-FM Silicon Laboratories Inc, SI4031-B1-FM Datasheet - Page 38

• Manufacturer Part Number: SI4031-B1-FM
• Description: IC TX 240-930MHZ -8-13DB 20VQFN
• Manufacturer: Silicon Laboratories Inc
• Type: ISM Transmitterr

Specifications of SI4031-B1-FM

• Package / Case: 20-VQFN
• Frequency: 240MHz ~ 930MHz
• Applications: General Purpose
• Modulation Or Protocol: FSK, GFSK, OOK
• Data Rate - Maximum: 256 kbps
• Power - Output: 13dBm
• Current - Transmitting: 30mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 240 MHz to 930 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 1.8 V to 3.6 V
• Supply Current: 30 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Si4030/31/32-B1
6.6. TX Retransmission and Auto TX
The Si4030/31/32 is capable of automatically retransmitting the last packet loaded in the TX FIFO. Automatic
retransmission is set by entering the TX state with the txon bit without reloading the TX FIFO. This feature is useful
for beacon transmission or when retransmission is required due to the absence of a valid acknowledgement. Only
packets that fit completely in the TX FIFO can be automatically retransmitted.
An automatic transmission function is available, allowing the radio to automatically start or stop a transmission
depending on the amount of data in the TX FIFO.
When autotx is set in “Register 08. Operating & Function Control 2," the transceiver will automatically enter the TX
state when the TX FIFO almost full threshold is exceeded. Packets will be transmitted according to the configured
packet length. To stop transmitting, clear the packet sent or TX FIFO almost empty interrupts must be cleared by
reading register.
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