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5
harman/kardon
4R29
2K
TUNER_GPIO1
4R30
2K
TUNER_GPIO2/INT
D
I2S_TUNER_CL
I2S_TUNER_WS
4R33
100R
I2S_TUNER_D
DGND
TUNER_3.3V
TUNER_3.3V
DGND
CLOSE TO VDD
4C05
C487
22uF/10v
223
TUNER_3.3V
DGND
C
I2C_DATA_AV
I2C_CLK_AV
Tuner_Reset
1. Place C487 close to VDD pin.
2. All grounds connect directly to GND plane on PCB.
3. Pins 1 and 20 are no connects, leave floating.
B
4. To ensure proper operation and receiver performance, follow the guidelines in "AN383: Si47xx 3 mm x 3 mm QFN
Universal Layout Guide." Silicon Laboratories will evaluate schematics and layouts for qualified customers.
5. Pin 2 connects to the FM antenna interface, and pin 4 connects to the AM antenna interface.
6. RFGND should be locally isolated from GND.
7. Place Si4704/05 as close as possible to antenna jack and keep the FMI and AMI traces as short as possible.
8. 4R29,4R30->2K;
4R33->600R; C487->22nF，C490->100nF
Y4->32.768; C491,C492->22pF .
9. ESD closed to C400 for Layout pcb when ESD capacitance >1pF .
A
5
4
U408
Si4705-B20-GM
15
1
DOUT
NC1
C400
103
14
2
LOUT/DFS
FMI
13
3
ROUT/DOUT
RFGND
12
4
GND
AMI
11
5
VDD
RST
RFGND
RFGND
C490
R425
104
100R
DGND
DGND
4R39
22R
4R40
22R
4R41
22R
4
3
ANT401
IF-02P
2
GND
1
FM
3
GND
4
GND
DGND
ESD409
AVLC18S03015
1
2
Optional
L405
270nH
DGND
DGND
TUNER_3.3V
4R53
4.7K
3
2
TUNER_3.3V
R400
30K N/A
U402
SN74LVC1G04DBVR N/A
4C04
2
4
+
A
Y
100p N/A
-
R426
30K N/A
Y403
32.768KHZ
RCLK
4R38
0R
DGND
4
3
4R37
10M N/A
1
2
DGND
Y401
1
2
32.768KHz 12.5PF 20PPM 3.2*1.5MM N/A
C491
22p N/A
DGND
Title
HS2X0 AV BOARD - 090905
Size
Document Number
A3
5983Y
Date:
Monday, March 29, 2010
2
1
HS 2X0/230 Service Manual
D
4R35
0R N/A
RCLK
C
R424
10K N/A
C492
22p N/A
B
A
Rev
1.6
Sheet
4
of
4
1
Page 69 of 73
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