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MaxTech NXP-16 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Redes MaxTech NXP-16. PCA9532 16-bit I2C-bus LED dimmer Manual do Utilizador

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1. General description
The PCA9532 is a 16-bit I
2
C-bus and SMBus I/O expander optimized for dimming LEDs in
256 discrete steps for Red/Green/Blue (RGB) color mixing and back light applications.
The PCA9532 contains an internal oscillator with two user programmable blink rates and
duty cycles coupled to the output PWM. The LED brightness is controlled by setting the
blink rate high enough (> 100 Hz) that the blinking cannot be seen and then using the duty
cycle to vary the amount of time the LED is on and thus the average current through the
LED.
The initial setup sequence programs the two blink rates/duty cycles for each individual
PWM. From then on, only one command from the bus master is required to turn individual
LEDs ON, OFF, BLINK RATE 1 or BLINK RATE 2. Based on the programmed frequency
and duty cycle, BLINK RATE 1 and BLINK RATE 2 will cause the LEDs to appear at a
different brightness or blink at periods up to 1.69 second. The open-drain outputs directly
drive the LEDs with maximum output sink current of 25 mA per bit and 200 mA per
package (100 mA per octal).
To blink LEDs at periods greater than 1.69 second the bus master (MCU, MPU, DSP,
chip set, etc.) must send repeated commands to turn the LED on and off as is currently
done when using normal I/O expanders like the NXP Semiconductors PCF8575 or
PCA9555. Any bits not used for controlling the LEDs can be used for General Purpose
parallel Input/Output (GPIO) expansion, which provides a simple solution when additional
I/O is needed for ACPI power switches, sensors, push-buttons, alarm monitoring, fans,
etc.
The active LOW hardware reset pin (RESET) and Power-On Reset (POR) initializes the
registers to their default state, all zeroes, causing the bits to be set HIGH (LED off).
Three hardware address pins on the PCA9532 allow eight devices to operate on the same
bus.
2. Features
n 16 LED drivers (on, off, flashing at a programmable rate)
n Two selectable, fully programmable blink rates (frequency and duty cycle) between
0.591 Hz and 152 Hz (1.69 second and 6.58 milliseconds)
n 256 brightness steps
n Input/outputs not used as LED drivers can be used as regular GPIOs
n Internal oscillator requires no external components
n I
2
C-bus interface logic compatible with SMBus
n Internal power-on reset
PCA9532
16-bit I
2
C-bus LED dimmer
Rev. 04 — 17 March 2009 Product data sheet
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Resumo do Conteúdo

Página 1 - 2. Features

1. General descriptionThe PCA9532 is a 16-bit I2C-bus and SMBus I/O expander optimized for dimming LEDs in256 discrete steps for Red/Green/Blue (RGB)

Página 2 - 4. Block diagram

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 10 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer7.

Página 3 - 5. Pinning information

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 11 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer7.

Página 4 - 5.2 Pin description

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 12 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer7.

Página 5 - 6. Functional description

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 13 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer8.

Página 6 - 6.3 Register descriptions

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 14 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer8.

Página 7

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 15 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer9.

Página 8

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 16 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer10

Página 9 - 6.6 External RESET

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 17 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer(1

Página 10 - 7. Characteristics of the I

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 18 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer11

Página 11 - 7.3 Acknowledge

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 19 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmerFi

Página 12 - 7.4 Bus transactions

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 2 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmern N

Página 13 - 8.1 Minimizing I

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 20 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer12

Página 14 - 8.2 Programming example

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 21 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer13

Página 15 - 9. Limiting values

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 22 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmerFi

Página 16 - 10. Static characteristics

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 23 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmerFi

Página 17

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 24 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer14

Página 18 - 11. Dynamic characteristics

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 25 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer•

Página 19

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 26 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmerFo

Página 20 - 12. Test information

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 27 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer17

Página 21 - 13. Package outline

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 28 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer18

Página 22

NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer© NXP B.V. 2009. All rights reserved.For more information, please visit: http://www.nxp.comFor sales

Página 23

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 3 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer5.

Página 24 - 15. Soldering of SMD packages

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 4 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer5.2

Página 25

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 5 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer6.

Página 26 - 16. Abbreviations

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 6 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer6.2

Página 27 - 17. Revision history

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 7 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer6.3

Página 28 - 19. Contact information

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 8 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer6.3

Página 29 - 20. Contents

PCA9532_4 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 04 — 17 March 2009 9 of 29NXP SemiconductorsPCA953216-bit I2C-bus LED dimmer6.4

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