NXP Semiconductors PCA9959HN-ARD, Руководство пользователя, Страница: 29 / 32

NXP Semiconductors
UM11623
PCA9959HN-ARD evaluation board
then click WriteAll button. This command sets all GD[x]G[y] internal registers with the
“Preset Current 1” value.
11.Click
Global
→
Page Select
(see Figure 13 ). From the interface set the value “1” for
bit 7 (in the displayed byte is the only active bit), and then click
Write
.
12.Go back to the Channels tab (a new interface appears, because the MSB of
“PAGESEL” register was set with the value “1”). Click Group Config secondary tab
(see Figure 19 ). Select "Enable" option for the corresponding channel of the LED you
want to turn On (use the schematics to identify the corresponding channel). For a
quick check of the entire board, select “Enable” for all 24 channels. At the end, click
Write (to configure the internal registers of the DUT).
13.Click Preset Current 1 secondary tab (see Figure 20 ). From the “Preset Current 1”
interface, you can select the desired current for each LED, and then click Write . If the
desired current is the same for all selected channels, you can select the current for
“CH0 Preset Current 1”, and click WriteAll to set all channels with the same preset
current.
14.Go back to the Settings tab, select Enable for OE, and then click Set all . The
selected LEDs turn On, with the intensity according with the “Preset Current 1” value.
Starting from these steps and using the data sheet, the user can combine different
values for the internal registers of the DUT, to understand, and test the functionality of the
PCA9959 LED driver.
10 Abbreviations
Acronym Description
DNP Do Not Populate
DUT Device Under Test
ESD Electro Static Discharge
EVK Evaluation Board
GUI Graphical User Interface
I
2
C bus Inter-Integrated Circuit bus
IC Integrated Circuit
LED Light Emitting Diode
OS Overtemp Shutdown
PC Personal Computer
SPI Serial Peripheral Interface
USB Universal Serial Bus
Table 7. Abbreviations
11 References
1.
PCA9959
— 24-Channel SPI Serial Bus 63 mA/5.5 V Constant Current LED Driver
2. MIMXRT1050-EVK — i.MX RT1050 Evaluation Kit
3. LPC55S69-EVK — LPCXpresso55S69 Development Board
4. 8MMINILPD4-EVK — Evaluation Kit for the i.MX 8M Mini Applications Processor
UM11623 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2021. All rights reserved.
User manual Rev. 1 — 21 May 2021
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