4420-DKDB2 Silicon Laboratories Inc, 4420-DKDB2 Datasheet - Page 22

KIT DEV TEST EZRADIO SI4420 TRX

4420-DKDB2

Manufacturer Part Number
4420-DKDB2
Description
KIT DEV TEST EZRADIO SI4420 TRX
Manufacturer
Silicon Laboratories Inc
Datasheets

Specifications of 4420-DKDB2

Accessory Type
Test Card, Transceiver, 434MHz
Wireless Frequency
434 MHz
Interface Type
SPI
Modulation
FSK
For Use With/related Products
EZRadio®
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
15. Status Read Command
The read command starts with a zero, whereas all other control commands start with a one. If a read command is identified, the status bits
will be clocked out on the SDO pin as follows:
Status Register Read Sequence with FIFO Read Example:
RGIT
FFIT
POR
RGUR
FFOV
WKUP
EXT
LBD
FFEM
ATS
RSSI
DQD
CRL
ATGL
OFFS(6)
OFFS(3) -OFFS(0)
TX register is ready to receive the next byte (Can be cleared by Transmitter Register Write Command)
The number of data bits in the RX FIFO has reached the pre-programmed limit (Can be cleared by any of the
FIFO read methods)
Power-on reset (Cleared after Status Read Command)
TX register under run, register over write (Cleared after Status Read Command)
RX FIFO overflow (Cleared after Status Read Command)
Wake-up timer overflow (Cleared after Status Read Command)
Logic level on interrupt pin (pin 16) changed to low (Cleared after Status Read Command)
Low battery detect, the power supply voltage is below the pre-programmed limit
FIFO is empty
Antenna tuning circuit detected strong enough RF signal
The strength of the incoming signal is above the pre-programmed limit
Data quality detector output
Clock recovery locked
Toggling in each AFC cycle
MSB of the measured frequency offset (sign of the offset value)
Offset value to be added to the value of the frequency control parameter (Four LSB bits)
Si4420
22

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