SI4844-B20 Datasheet, PDF (20/27 Pages) Silicon Laboratories – BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER

Si4844-B20
6. Pin Description: Si4844-B
Pin Number(s)
1
2
3
4
5
6,7
8
9
10, 11
12
13, 14
15
16
17
18
19
20
21
22
23
24
LNA_EN
1
IRQ
2
TUNE1
3
TUNE2
4
BAND
5
NC
6
NC
7
FMI
8
RFGND
9
NC
10
NC
11
AMI
12
24
LOUT
23
ROUT
22
DBYP
21
VDD2
20
VDD1
19
XTALI
18
XTALO
17
SCLK
16
SDIO
15
RST
14
GND
13
GND
Name
LNA_EN
IRQ
TUNE1
TUNE2
BAND
NC
FMI
RFGND
NC
AMI
GND
/RST
SDIO
SCLK
XTALO
XTALI
VDD1
VDD2
DBYP
ROUT
LOUT
Description
Enabling SW external LNA
Interrupt Request
Frequency tuning
Frequency tuning
Band selection and De-emphasis/Stereo separation selection
No connect. Leave floating.
FM RF inputs. FMI should be connected to the antenna trace.
RF ground. Connect to ground plane on PCB.
Unused. Tie these pins to GND.
AM RF input. AMI should be connected to the AM antenna.
Ground. Connect to ground plane on PCB.
Device reset (active low) input
Serial data input/output
Serial clock input
Crystal oscillator output
Crystal oscillator input /external reference clock input.
Supply voltage. May be connected directly to battery.
Supply voltage. May be connected directly to battery.
Dedicated bypass for VDD
Right audio output
Left audio output
20
Rev. 1.0