SI4770-77-A20 Datasheet, PDF (37/54 Pages) Silicon Laboratories – HIGH-PERFORMANCE CONSUMER ELECTRONICS

Si4770/77-A20
Digital I/Q ZIF
(I²S)
QOUT (Pin 26)
IOUT (Pin 25)
IQFS (Pin24)
IQCLK (Pin 23)
Master
4-wire mode
Si4777
HD Radio Demod
Demod
Audio /Data
Decoders
Master
3-wire mode
X
AM/FM Analog demodulation
Weak signal processing
IBOC
blend
PLL
AM/FM
audio
Blended
audio
ASRC
ASRC
BLEND (Pin 30)
DCLK (Pin 29)
DFS (Pin 28)
DIN (Pin 27)
Blend Flag
Digital bit clock
Digital frame sync
HD audio (MP1)
DOUT2 (Pin 14)
DCLK2 (Pin 13)
DFS2 (Pin 18)
Blended audio
Digital bit clock
Digital frame sync
Master
DSP
Figure 22. System Implementation of HD-Radio Reception with IBOC Blend on the Si4777
Rev. 0.9
37