SI4704 Datasheet, PDF (27/36 Pages) Silicon Laboratories – Worldwide FM band support (64-108 MHz) integrated antenna support EN55020 compliant

6. Pin Descriptions: Si4704/05-GM
Si4704/05-C40
NC 1 ^{20 19 18 17} 16
FMI 2
15 DOUT
RFGND 3
LPI 4
GND
PAD
14 LOUT
13 ROUT
RST 5
12 GND
6 _{7 8 9 10} 11 VDD
Pin Number(s)
1, 20
2
3
4
5
6
7
8
9
10
11
12, GND PAD
13
14
15
16
17
18
19
Name
NC
FMI
RFGND
LPI
RST
SEN
SCLK
SDIO
RCLK
V_IO
V_DD
GND
ROUT
LOUT
DOUT
DFS
GPO3/DCLK
GPO2/INT
GPO1
Description
No connect. Leave floating.
FM RF input.
RF ground. Connect to ground plane on PCB.
Loop antenna RF input.
Device reset input (active low).
Serial enable input (active low).
Serial clock input.
Serial data input/output.
External reference or crystal oscillator input.
I/O supply voltage.
Supply voltage. May be connected directly to battery.
Ground. Connect to ground plane on PCB.
Right audio analog line output.
Left audio analog line output.
Digital audio output data.
Digital frame synchronization.
General purpose output/digital bit synchronous clock or crystal oscillator
input.
General purpose output/interrupt.
General purpose output.
Rev. 1.0
27