PixArt Imaging Inc.
PAC7312
VGA PC Camera Single-Chip with Audio
6. Reference Application Circuit
6.1 PLCC Package (PAC7312PE)
VSSAY
VSSQ
VDDQ
R1
R2
R3
10k
10k
10k
EPR_CK/TR3
EPR_CS/TR2
EPR_DI/TR1
10k
VDDQ
R4
R5 1K
U1
LED
D1
LED
19
20
21
22
23
24
25
26
27
28
29
30
6
R6 51k
C1 1uF
NC
NC
VCM
RST#
GPO/TR0
LED
VCM
VRB
5
GPO/TR0
LED
4
KEY S1
VDDD C2
KEY
VRB
3
NC
NC
1uF
1uF
2
MIC
TEST2
EPR_EN
IOTRAP#
KEY#
NC
MIC
1
VDDP
C3
NC
48
47
PAC7312PE
PWR_5V
VSSA
VDDAV
VDDAD
VDDP
VDDQ
VDD5V
VSSA
XOUT
C4
47pF
47pF
KEY
R7
1M
X1
46 VDDAV
45 VDDAD
44 VDDP
43
12MHz
XI N
C5
VSSQ
VSSQ
VDDD
PWR_5V
VDDD
VSSQ
VDDA
C6
1uF
VDD5V
VDDQ
VDDAV
VDDAD
C7
1uF
1uF
1uF
1uF
1uF
C8
VRT
C9
C10
VDDQ
VRB 1uF
C11
C12
VSSQ
VSSQ
VCM
VDD5V
R8
2k
R9
1K
C13
1uF
MIC
VSSA
VDDAY
C15
0.1uF
C14
+
R10
C16
10uF
L1
3.3uH
VSSAY
VSSA
22K
100pF
R11 4.7K
VSSA
Q1
2N3904
L2
Open/3.3uH
+
-
C17 4.7uF
MICROPHONE
GPO/TR0
R12
X2
4.7K
R13 C18
+
C19
VSSQ
VSSAY
C20
+
1K
22uF
0.001uF
VDD5V
10uF
Q2
R14 100k
R15 22K
C21
R16
C22
10uF
0.1uF
10uF
0.1uF
10uF
0.1uF
10uF
0.1uF
10uF
0.1uF
2N3904
R17
10k
+
27K
R18
47
4.7uF
C23
C24
C25
C26
C27
C28
C29
C34
C36
VSSA
VDDQ
CON1
VDDQ
MINI USB 5P
R19
1.5K
5
VSSQ
GND2
4
R20 27 ohm
R21 27 ohm
L3 Short / 3.3uH
L4 Short / 3.3uH
NC
3
DP
DN
+
2
-
VDD5V
1
+5V
C31 C32
20pF 20pF
C33 C30
+
R22 10M
10uF
0.1uF
C35 4.7nF
VSSQ
USBGND
VSSQ
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11
PixArt Imaging Inc.
E-mail: fae_service@PixArt.com.tw
V1.5 Oct. 2005
PIXART [ PIXART IMAGING INC. ]
