UM10574 Datasheet, PDF (7/14 Pages) NXP Semiconductors – PCA9685 demonstration board OM13332

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9-pin connector to/from I2C 2005-1
or to/from PCA9685 demo board
9-pin connector to/from I2C 2005-1
or to/from PCA9685 demo board
9-pin female
connector
1
2
3
4
5
6
7
8
9
J3
+5 V
+3.3 V
SCL_2
GND
SDA_2
C3
10 μF
C4
10 μF
1 /OE
TP1
(output enable)
1 EXTCLK
TP2
(external clock in)
SW1
SW DIP-8
J5
3
2
1
VDD_IN
+3.3 V
J1
+5 V
U1
A0
A1
A2
A3
A4
A5
(switched to GND when
external clock is not used)
1
2
3
4
5
LED0 6
LED1 7
LED2 8
LED3 9
LED4 10
LED5 11
LED6 12
LED7 13
14
A0
A1
A2
A3
A4
LED0
LED1
LED2
LED3
LED4
LED5
LED6
LED7
VSS
VDD
SDA
SCL
EXTCLK
A5
/OE
LED15
LED14
LED13
LED12
LED11
LED10
LED9
LED8
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SDA filter
SCL filter
EXTCLK
A5
/OE
LED15
LED14
LED13
LED12
LED11
LED10
LED9
LED8
PCA9685PW
VDD_IN
C5
C6
0.1 μF
4.7 μF
R9
1 kΩ
D1
LTST-C170KGKT
+5 V
+3.3 V
C1
10 μF
SCL_1
C2 _GND
10 μF _{SDA_1}
9-pin female
connector
1
2
3
4
5
6
7
8
9
J2
14-pin connector to/from WIN-I2CUSB
Fm+ I2C master to drive PCA9685
VP for I2C pull-up VDD
J4
on WIN-I2CUSB board
1
3
5
7
GND
9
11
+3.3 V 13
2 (VP) VDO_IN
4
SCL_1
6
GND
8
SDA_1
10
12
14
+5 V
HEADER 7x2/SM
I2CUSB CONNECTOR
GND
LED0 R10
440 Ω
C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22
0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF
LED1
R11
1.16 kΩ
LED2 R12
720 Ω
LED3 R13
720 Ω
LED4 R14
440 Ω
LED5 R15
1.16 kΩ
LED6 R16
720 Ω
D5 LED[5:7]
LED7 R17
LED8 R18
LED9 R19
LED10 R20
LED11 R21
LED12 R22
LED13 R23
LED14 R24
LED15 R25
720 Ω
440 Ω
1.16 kΩ
720 Ω
720 Ω
440 Ω
1.16 kΩ
720 Ω
720 Ω
D8 LED[13:15]
D7 LED[9:11]
A1 C1
C2 C3
A2 A3
LRTB_G6SG
A1 C1
C2 C3
A2 A3
LRTB_G6SG
limited the current to 2.5 mA
white LED VF = 3.9 V
red LED VF = 2.1 V
green/blue LED VF = 1.8 V
A1 C1
C2 C3
A2 A3
LRTB_G6SG
+5 V
LED0
D2
LW-E67C-white
D3 LED[1:3]
A1 C1
C2 C3
A2 A3
LRTB_G6SG
LED4
D4
LW-E67C-white
LED8
D6
LW-E67C-white
LED12
D9
LW-E67C-white
SDA_1
close to connector J2/J4
U2
1 _{GND VCC} 4
2 _{I/O1 I/O2} 3
L1
BLM18BD471SN1
PRTR5V0U2AX
SCL_1
L2
BLM18BD471SN1
(470 Ω at 100 MHz)
J6
3
2
1
+5 V
GND
C23
0.01 μF
SDA-filter
SCL-filter
SDA_2
close to 9-pin connector J3
U3
1 _{GND VCC} 4
2 _{I/O1 I/O2} 3
L3
BLM18BD471SN1
PRTR5V0U2AX
SCL_2
L4
BLM18BD471SN1
(470 Ω at 100 MHz)
+5 V
C24
0.01 μF
SDA-filter
SCL-filter
019aac802
Fig 4. PCA9685 demo board schematic