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UM10
574
Al
l i
n
for
m
at
ion
pr
ovi
ded
in
this
do
cum
ent i
s
sub
jec
t to
leg
a
l d
is
c
la
im
er
s.
©
NXP
Se
mic
o
n
duc
tor
s
N.V
. 2014.
Al
l r
ig
h
ts
r
e
s
er
v
ed.
User m
anu
al
Rev
.
1 — 1 Ap
ril 2014
7 o
f 14
N
X
P Semi
conductor
s
UM10574
PCA9
68
5
demon
str
at
ion
b
oard
OM13
332
6. Schematic
Fig 4.
PCA9685 demo board schematic
019aac802
1
2
3
+5 V
+3.3 V
4
5
SCL_1
J2
C1
10 μF
9-pin female
connector
6
7
SDA_1
GND
8
9
C2
10 μF
9-pin connector to/from I2C 2005-1
or to/from PCA9685 demo board
3
2
1
J6
1
GND
2
I/O1
4
V
CC
3
I/O2
U2
close to connector J2/J4
PRTR5V0U2AX
C23
0.01 μF
+5 V
L1
BLM18BD471SN1
SDA_1
SDA-filter
L2
BLM18BD471SN1
SCL_1
SCL-filter
(470 Ω at 100 MHz)
1
GND
2
I/O1
4
V
CC
3
I/O2
U3
close to 9-pin connector J3
PRTR5V0U2AX
C24
0.01 μF
+5 V
L3
BLM18BD471SN1
SDA_2
SDA-filter
L4
BLM18BD471SN1
SCL_2
SCL-filter
(470 Ω at 100 MHz)
C7
0.1 nF
C8
0.1 nF
C9
0.1 nF
C10
0.1 nF
C11
0.1 nF
C12
0.1 nF
C13
0.1 nF
C14
0.1 nF
C15
0.1 nF
C16
0.1 nF
C17
0.1 nF
C18
0.1 nF
C19
0.1 nF
C20
0.1 nF
C21
0.1 nF
C22
0.1 nF
D2
LED0
LW-E67C-white
+5 V
A1
C2
A2
C1
C3
A3
D3 LED[1:3]
LRTB_G6SG
D4
LED4
LW-E67C-white
R10
440 Ω
R11
1.16 kΩ
R12
720 Ω
R13
720 Ω
LED0
LED1
LED2
LED3
R14
440 Ω
R15
1.16 kΩ
R16
720 Ω
LED4
LED5
LED6
R17
720 Ω
R18
440 Ω
R19
1.16 kΩ
LED7
LED8
LED9
R20
720 Ω
R21
720 Ω
R22
440 Ω
LED10
LED11
LED12
R23
1.16 kΩ
R24
720 Ω
R25
720 Ω
LED13
LED14
LED15
A1
C2
A2
C1
C3
A3
D5 LED[5:7]
LRTB_G6SG
D6
LED8
LW-E67C-white
A1
C2
A2
C1
C3
A3
D7
LED[9:11]
LRTB_G6SG
D9
LED12
LW-E67C-white
A1
C2
A2
C1
C3
A3
D8 LED[13:15]
LRTB_G6SG
3
2
1
J5
GND
GND
VP for I2C pull-up VDD
on WIN-I2CUSB board
1
2
3
4
5
A1
A2
A4
A3
A1
A2
A4
A3
A0
PCA9685PW
6
7
8
9
LED0
LED1
LED3
LED2
LED0
LED1
LED3
LED2
10
11
12
LED4
LED6
LED5
LED4
LED6
LED5
13
14
LED7
LED7
V
SS
U1
28
27
26
25
24
A5
EXTCLK
SDA
SCL
A5
EXTCLK
V
DD
23
22
21
20
/OE
LED15
LED13
LED14
/OE
LED15
LED13
LED14
19
18
17
LED12
LED10
LED11
LED12
LED10
LED11
16
15
LED9
LED8
LED9
LED8
SW1
SW DIP-8
R1
10 kΩ
R2
10 kΩ
R3
10 kΩ
R4
10 kΩ
VDD_IN
(output enable)
TP2
1
SDA filter
SCL filter
R9
1 kΩ
1
2
3
J1
+3.3 V
+5 V
VDD_IN
C5
0.1 μF
C6
4.7 μF
D1
LTST-C170KGKT
limited the current to 2.5 mA
white LED V
F
= 3.9 V
red LED V
F
= 2.1 V
green/blue LED V
F
= 1.8 V
1
3
5
7
9
11
13
2
4
SCL_1
(VP) VDO_IN
6
8
10
GND
SDA_1
12
14
+5 V
J4
GND
+3.3 V
14-pin connector to/from WIN-I2CUSB
Fm+ I2C master to drive PCA9685
HEADER 7x2/SM
I2CUSB CONNECTOR
A0
R5
10 kΩ
R6
10 kΩ
R7
10 kΩ
R8
10 kΩ
A5
EXTCLK
TP1
1 /OE
(external clock in)
(switched to GND when
external clock is not used)
1
2
3
+5 V
+3.3 V
4
5
SCL_2
J3
C4
10 μF
9-pin female
connector
6
7
SDA_2
GND
8
9
C3
10 μF
9-pin connector to/from I2C 2005-1
or to/from PCA9685 demo board