SI4431-A0-FM Silicon Laboratories Inc, SI4431-A0-FM Datasheet - Page 88

• Manufacturer Part Number: SI4431-A0-FM
• Description: IC TXRX ISM 930MHZ 3.6V 20-QFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4431-A0-FM

• Package / Case: 20-QFN
• Mfg Application Notes: Transitioning SI4430/31 to Rev B
• Frequency: 240MHz ~ 930MHz
• Data Rate - Maximum: 128kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Power - Output: 13dBm
• Sensitivity: -118dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 18.5mA
• Current - Transmitting: 28mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 2
• Number Of Transmitters: 1
• Wireless Frequency: 240 MHz to 930 MHz
• Output Power: 13 dBm
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 28 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK, GFSK, OOK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1633-5

Si4431
88
Bit
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Table 32. Detailed Description of Status Registers when not Enabled as Interrupts
ipreainval Self cleaning, user should use this as an interrupt source rather than a status.
ipreaval
ichiprdy
ipreainval Self cleaning, user should use this as an interrupt source rather than a status.
Status
Name
iswdet
ipreaval
ichiprdy
Status
iswdet
Name
irssi
iwut
ipor
ilbd
irssi
iwut
ipor
ilbd
Goes high once the Sync Word is detected. Goes low once we are done receiving the cur-
Goes high once the preamble is detected. Goes low once the sync is detected or the RX
Should remain high as long as the RSSI value is above programmed threshold level
Low Battery Detect. When a low battery event is been detected this bit will be set to 1. This
rent packet.
wait for the sync times-out.
Wake time timer interrupt. Use as an interrupt, not as a status.
interrupt event is saved even if it is not enabled by the mask register bit and causes an inter-
rupt after it is enabled. Probably the status is cleared once the battery is replaced.
Chip ready goes high once we enable the xtal, TX or RX and a settling time for the Xtal clock
elapses. The status stay high unless we go back to Idle mode.
Power on status.
Goes high once the Sync Word is detected. Goes low once we are done receiving the cur-
rent packet.
Goes high once the preamble is detected. Goes low once the sync is detected or the RX
wait for the sync times-out.
Should remain high as long as the RSSI value is above programmed threshold level
Wake time timer interrupt. Use as an interrupt, not as a status.
Low Battery Detect. When a low battery event is been detected this bit will be set to 1. This
interrupt event is saved even if it is not enabled by the mask register bit and causes an
interrupt after it is enabled. Probably the status is cleared once the battery is replaced.
Chip ready goes high once we enable the xtal, TX or RX, and a settling time for the Xtal
clock elapses. The status stay high unless we go back to Idle mode.
Power on status.
Table 31. Interrupt or Status 2 Bit Set/Clear Description
Preliminary Rev. 0.4
Set/Clear Conditions
Set/Clear Conditions