SI4770-77-A20 Datasheet, PDF (48/54 Pages) Silicon Laboratories – HIGH-PERFORMANCE CONSUMER ELECTRONICS

Si4770/77-A20
Table 19. Pin Descriptions for Si4770/77 (Continued)
Pin Number
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
PDL
Name
NC
RSTB
SDA
SCL
INTB
VIO1
VD
DBYP
VIO2
NC/IQCLK
NC/IQFS
NC/IOUT
NC/QOUT
DOUT
DFS
DCLK
NC
VA
LOUT/ MPXOUT
ROUT
XTAL2/RCLK
XTAL1
DACREF
GPIO2
GPIO1
FMAGC2
FMAGC1
GND PAD
I/O
Description
No connect: Leave floating
I Global Chip Reset
I/O I²C Data input/output
I I²C clock
O Interrupt, Active Low
S Host I/O Supply Voltage (all pads except digital audio and I/Q)
S Digital Voltage Supply
I Digital bypass to Ground
S Digital audio and I/Q interface supply voltage
O No Connect: Leave floating (Si4770); ZIF I/Q bit clock output (Si4777)
O No Connect: Leave floating (Si4770); ZIF I/Q frame sync output
(Si4777)
O No Connect: Leave floating (Si4770); ZIF I data output (Si4777)
O No Connect: Leave floating (Si4770); ZIF Q data output (Si4777)
O Digital audio data output
I Digital audio frame sync input
I Digital audio bit clock input
No Connect: Leave floating
S Analog Voltage Supply
O Left audio line out / FM MPX output
O Right audio line out
I Crystal oscillator input/Reference clock input
O Crystal oscillator output
I Voltage Reference for analog outputs
I/O General-purpose input/output
I/O General-purpose input/output
I FM automatic gain control 2
I FM automatic gain control 1
I Ground. Reference ground
48
Rev. 0.9