OM13332,598 Datasheet OM13332,598 | P4-P6

User manual Rev. 1 — 1 April 2014 4 of 14

NXP Semiconductors

UM10574

PCA9685 demonstration board OM13332

4. Installation

4.1 I2C demo board 2005-1 and WIN-I2CUSB Lite software

The OM13332 is a daughter card to the OM6275 I2C demo board 2005-1. You can

download the WIN-I2CUSB Lite Software, the OM6275 user manual UM10206, and find

ordering information at the NXP web site www.nxp.com/demoboard/OM6275.html

The Win-I2CUSB Lite software from The Boardshop runs on Windows 98SE, ME, 2000,

and XP, and is compatible with any PC hardware having a minimum of a Pentium

processor and a USB port. The software allows the user to select one of the I

C-bus

devices on the board from a menu and also provides a Universal mode (I2C Expert mode)

to allow users to create their own I

C-bus commands with the same I

C-bus devices.

4.2 OM13332 connection to I2C demo board 2005-1

The I2C demo board 2005-1 should be disconnected from your PC before mounting the

OM13332 board on to it. The OM13332 board has a 9-pin female connector (J2) that

connects to the JP1 male connector on the I2C demo board 2005-1 as shown in Figure 1

With both boards facing you, with USB connector on the left-hand side as shown in

Figure 1

, connect the OM13332 board to the I2C demo board 2005-1 before connecting

the USB cable. Once the board is connected, connect the USB cable and start the

WIN-I2CUSB Lite software. You are now ready to evaluate the PCA9685.

Fig 1. PCA9685 demo board (OM13332) mounting to the I2C demo board 2005-1 (OM6275)

User manual Rev. 1 — 1 April 2014 5 of 14

NXP Semiconductors

UM10574

PCA9685 demonstration board OM13332

4.3 OM13332 connection to Win-I2CUSB hardware adapter board

The Win-I2CUSB board should be disconnected from your PC before connecting the

OM13332 board on to it. The OM13332 board has a 14-pin male connector (J4) that

connects to the 14-pin male connector (J1) on the Win-I2CUSB board as shown in

Figure 2

Connect the OM13332 board to the Win-I2CUSB board before connecting the USB cable.

Once the board is connected, connect the USB cable and start the WIN-I2CUSB Lite

software. You are now ready to evaluate the PCA9685.

Fig 2. PCA9685 demo board (OM13332) connecting to the Win-I2CUSB board

User manual Rev. 1 — 1 April 2014 6 of 14

NXP Semiconductors

UM10574

PCA9685 demonstration board OM13332

5. Hardware description

Figure 3 shows the following items on the hardware:

• J2 (9-pin) is for connection to JP1 on I2C demo board 2005-1.

• J3 (9-pin male) is for connection to the second PCA9685 demo board or I

C-bus

device.

• J1 selects V

power for PCA9685, connected 1-2 for V

= 3.3 V and connected 2-3

for V

= 5 V.

• S1 8-position DIP switch to select I

C-bus address A[0:5] = S1[1:6] for this device

(default is 0x80, all switches S1[1:6] are ON position). S1[7] is used to control output

enable (/OE, default is ON position to enable LED outputs), S1[8] is used to control

EXTCLK (default is ON position to disable the EXTCLK).

• J4 (14-pin) is for connection to J1 on Win-I2CUSB board.

• 4-channel to drive four White LEDs (D2, D4, D6, D9) and 12-channel to drive four

RGB LEDs (D3, D5, D7, D8).

• /OE (TP1) is input to drive output enable (pin 23) when S1[7] is set to OFF position.

• EXTCLK (TP2) is input to EXTCLK (pin 25) when S1[8] is set to OFF position.

• J5 and J6 are GND pins for probing use.

Fig 3. PCA9685 demo board (OM13332)

P1-P3 P4-P6 P7-P9 P10-P12 P13-P14

OM13332,598

Mfr. #:

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Manufacturer:

NXP Semiconductors

Description:

PCA9685 PWM DEMO BOARD

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OM13332,598