SI4330-B1-FMR Silicon Laboratories Inc, SI4330-B1-FMR Datasheet - Page 21

• Manufacturer Part Number: SI4330-B1-FMR
• Description: IC RX ISM 240-960MHZ 20VQFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4330-B1-FMR

• Frequency: 240MHz ~ 960MHz
• Sensitivity: -121dBm
• Data Rate - Maximum: 256 kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Applications: Remote Control, RKE, Security Systems
• Current - Receiving: 18.5mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Features: RSSI Equipped
• Voltage - Supply: 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -

3.3. Interrupts
The Si4330 is capable of generating an interrupt signal when certain events occur. The chip notifies the
microcontroller that an interrupt event has occurred by setting the nIRQ output pin LOW = 0. This interrupt signal
will be generated when any one (or more) of the interrupt events (corresponding to the Interrupt Status bits) shown
below occur. The nIRQ pin will remain low until the microcontroller reads the Interrupt Status Register(s) (Registers
03h–04h) containing the active Interrupt Status bit. The nIRQ output signal will then be reset until the next change
in status is detected. The interrupts must be enabled by the corresponding enable bit in the Interrupt Enable
Registers (Registers 05h–06h). All enabled interrupt bits will be cleared when the microcontroller reads the
interrupt status register. If the interrupt is not enabled when the event occurs it will not trigger the nIRQ pin, but the
status may still be read at anytime in the Interrupt Status registers.
Add R/W Function/Descript
For a complete descriptions of each interrupt, see “AN467: Si4330 Register Descriptions.”
03
04
05 R/W
06 R/W
R
R
Interrupt Enable 1
Interrupt Enable 2
Interrupt Status 1
Interrupt Status 2
ion
enswdet enpreaval enpreainval
enfferr
iswdet
ifferr
D7
Reserved Reserved
Reserved Reserved enrxffafull enext Reserved enpkvalid encrcerror
ipreaval
D6
ipreainval
D5
Rev 1.0
irxffafull
enrssi
irssi
D4
enwut
iwut
iext Reserved ipkvalid
D3
enlbd
ilbd
D2
enchiprdy
ichiprdy
D1
Si4330-B1
icrcerror
enpor
ipor
D0
POR Def.
00h
01h
—
—
21