PCA9531PW,112 NXP Semiconductors, PCA9531PW,112 Datasheet - Page 8

• Manufacturer Part Number: PCA9531PW,112
• Description: IC LED DRIVER RGB 16-TSSOP
• Manufacturer: NXP Semiconductors
• Type: RGB LED Driverr

Specifications of PCA9531PW,112

• Topology: Open Drain, PWM
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: Backlight, LED Blinker
• Type - Secondary: RGB
• Frequency: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 568-4003 - DEMO BOARD LED DIMMER568-3615 - DEMO BOARD I2C
• Voltage - Output: -
• Efficiency: -
• Lead Free Status / Rohs Status: Details
• Other names: 568-3370-5; 935274729112; PCA9531PW

NXP Semiconductors
PCA9531_6
Product data sheet
6.3.6 LS0 to LS1 - LED selector registers
6.4 Pins used as GPIOs
6.5 Power-on reset
6.6 External RESET
The LSn LED select registers determine the source of the LED data.
Table 9.
Legend: * default value.
LED pins not used to control LEDs can be used as General Purpose I/Os (GPIOs).
For use as input, set LEDn to high-impedance (00) and then read the pin state via the
Input register.
For use as output, connect external pull-up resistor to the pin and size it according to the
DC recommended operating characteristics. LEDn output pin is HIGH when the output is
programmed as high-impedance, and LOW when the output is programmed LOW through
the ‘LED selector’ register. The output can be pulse-width controlled when PWM0 or
PWM1 are used.
When power is applied to V
a reset condition until V
and the PCA9531 registers are initialized to their default states, all the outputs in the
OFF state. Thereafter, V
A reset can be accomplished by holding the RESET pin LOW for a minimum of t
PCA9531 registers and I
RESET input is once again HIGH.
This input requires a pull-up resistor to V
Register
LS0 - LED0 to LED3 selector
LS0
LS1 - LED4 to LED7 selector
LS1
00 = output is set high-impedance (LED off; default)
01 = output is set LOW (LED on)
10 = output blinks at PWM0 rate
11 = output blinks at PWM1 rate
LS0 to LS1 - LED selector registers bit description
Bit
7:6
5:4
3:2
1:0
7:6
5:4
3:2
1:0
Rev. 06 — 19 February 2009
Value
00*
00*
00*
00*
00*
00*
00*
00*
DD
DD
2
C-bus state machine will be held in their default states until the
has reached V
DD
must be lowered below 0.2 V to reset the device.
, an internal Power-On Reset (POR) holds the PCA9531 in
Description
LED3 selected
LED2 selected
LED1 selected
LED0 selected
LED7 selected
LED6 selected
LED5 selected
LED4 selected
DD
POR
if no active connection is used.
. At that point, the reset condition is released
8-bit I
2
C-bus LED dimmer
PCA9531
© NXP B.V. 2009. All rights reserved.
w(rst)
. The
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