NXP Semiconductors PCA9955A, Руководство пользователя, Страница: 14 / 25

UM10729 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors B.V. 2017. All rights reserved.
User manual Rev. 2 — 1 August 2017 14 of 24
NXP Semiconductors
UM10729
PCA9955A/B demonstration board OM13483
software. As shown in Figure 7 , when the demonstration board hardware is correctly
connected to the USB port and the computer recognizes it, the message ‘Hardware
Detected’ is displayed on the bottom of the window.
Switched 3.3 V and 5.0 V power supplies are controlled through the ‘Options’ menu or by
double-clicking the 3.3 V or 5.0 V symbols on the bottom of the window. Power supplies
are disabled by default and must be enabled before using the I
2
C-bus devices on the
board. I
2
C-bus frequency is controlled through the ‘Options’ menu or by double-clicking
the frequency symbol on the bottom of the window.
8.1 PCA9955A/B blinking demo for all White and RGB LEDs
1. From the ‘Device’ drop-down menus select ‘Universal Modes’, and from the
subsequent drop-down menu select ‘Expert Mode’ as shown in Figure 7 .
2. Copy the ‘PCA9955A/B WHT_RGB LEDs blinking demo i2c address = 0x02h’ text file
as shown below. From the ‘File’ drop-down menus select ‘Open’, and from the
‘open data file’ window select the ‘PCA9955A/B WHT_RGB LEDs blinking demo
i2c address = 0x02h’ text file.
Expert Mode Data File
00,Write,Yes,0,06,Comments: SW reset
02,Write,Yes,0,45,80,Comments: write IREFALL to 80h (225 uA x 128 = 28.8 mA per
channel)
02,Write,Yes,500,82,01,01,01,01,Comments: start write LEDOUTx register to turn on
white LEDs
02,Write,Yes,700,82,04,04,04,04,Comments: start write LEDOUTx register to turn on
red LEDs
02,Write,Yes,500,82,01,01,01,01,Comments: start write LEDOUTx register to turn on
white LEDs
02,Write,Yes,700,82,10,10,10,10,Comments: start write LEDOUTx register to turn on
green LEDs
02,Write,Yes,500,82,01,01,01,01,Comments: start write LEDOUTx register to turn on
white LEDs
02,Write,Yes,700,82,40,40,40,40,Comments: start write LEDOUTx register to turn on
blue LEDs
02,Write,Yes,300,82,01,00,00,00,Comments: start write LEDOUTx register to turn on
white LEDs
02,Write,Yes,300,82,00,05,00,00,Comments: start write LEDOUTx register to turn on
white, red LEDs
02,Write,Yes,300,82,00,00,51,00,Comments: start write LEDOUTx register to turn on
white, Blue_Green LEDs
02,Write,Yes,300,82,00,00,00,55,Comments: start write LEDOUTx register to turn on
white and RGB LEDs
02,Write,Yes,400,82,40,01,04,10,Comments: start write LEDOUTx register to turn on
white and RGB LEDs
02,Write,Yes,400,82,10,40,01,04,Comments: start write LEDOUTx register to turn on
white and RGB LEDs
02,Write,Yes,400,82,04,10,40,01,Comments: start write LEDOUTx register to turn on
white and RGB LEDs
02,Write,Yes,400,82,01,40,10,04,Comments: start write LEDOUTx register to turn on
white and RGB LEDs