4021-DKDB14 Silicon Laboratories Inc, 4021-DKDB14 Datasheet - Page 20

• Manufacturer Part Number: 4021-DKDB14
• Description: KIT DEV TEST EZRADIO SI4021 TX
• Manufacturer: Silicon Laboratories Inc

Specifications of 4021-DKDB14

• Accessory Type: Test Card, Transmitter, 434MHz
• Wireless Frequency: 434 MHz
• Interface Type: SPI
• Modulation: FSK, OOK
• 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

Note:



Data Transmit Sequence Through the FSK Pin
Data Transmit Sequence Through the SDI Pin
Do not send CLK pulses with the TX data bits, otherwise they will be interpreted as commands.
This mode is not SPI compatible, therefore it is not recommended in microcontroller mode.
If the crystal oscillator and the PLL are running, the t
nSEL
SCK
SDI
FSK
Internal operations
ex, es, ea = 1
a0, a1 = 0
P o w e r M a n a g e m e n t C o m m a n d
C 0 h
synthesizer / PLL /
Xtal osc staus
instruction
PA status
d o n ' t c a r e
3 8 h
sx
+t
sp
delay is not needed.
t
sx *
t
sp *
synthesizer on, PLL locked, PA ready to transmit
xtal osc. stable
T X D A T A
NOTE:
* See page 6 for the timing values
Si4021
20