Silicon Laboratories SI4734/35-B20 - Manual (Page 30)

S i 4 7 3 4 / 3 5 - B 2 0
30 Rev. 1.0
6. Pin Descriptions: Si4734/35-GM
Pin Number(s) Name Description
1, 20 NC No connect. Leave floating.
2 FMI FM RF inputs.
3 RFGND RF ground. Connect to ground plane on PCB.
4 AMI AM/SW/LW RF input.
5 RST Device reset (active low) input.
6 SEN Serial enable input (active low).
7 SCLK Serial clock input.
8 SDIO Serial data input/output.
9 RCLK External reference oscillator input.
10 V
IO
I/O supply voltage.
11 V
DD
Supply voltage. May be connected directly to battery.
12, GND PAD GND Ground. Connect to ground plane on PCB.
13 ROUT Right audio line output in analog output mode.
14 LOUT Left audio line output in analog output mode.
15 DOUT Digital output data in digital output mode.
16 DFS Digital frame synchronization input in digital output mode.
17 GPO3/DCLK General purpose output, crystal oscillator, or digital bit synchronous clock input
in digital output mode.
18 GPO2/INT General purpose output or interrupt pin.
19 GPO1 General purpose output.
GND
PAD
1
2
3
17 18 19 20
11
12
13
14
6 7 8 9
4
5
16
10
15
GP
O2/
IN
T
VI
O
DOUT
LOUT
ROUT
GND RST
NC
AMI
RC
LK
SD
IO
VDD
FMI
RFGND
GP
O3/
DCLK
NC GP
O1
DF
S
SC
LK
SE
N