PCA9531D,112 NXP Semiconductors, PCA9531D,112 Datasheet - Page 6

• Manufacturer Part Number: PCA9531D,112
• Description: IC LED DRIVER RGB 16-SOIC
• Manufacturer: NXP Semiconductors
• Type: RGB LED Driverr

Specifications of PCA9531D,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-SOIC (3.9mm Width)
• 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: 568-3369-5; 935274731112; PCA9531D

NXP Semiconductors
PCA9531_6
Product data sheet
6.2.1 Control register definition
6.3.1 INPUT - Input register
6.2 Control register
6.3 Register descriptions
Following the successful acknowledgement of the slave address, the bus master will send
a byte to the PCA9531, which will be stored in the Control register.
The lowest 3 bits are used as a pointer to determine which register will be accessed.
If the Auto-Increment flag is set, the three low order bits of the Control register are
automatically incremented after a read or write. This allows the user to program the
registers sequentially. The contents of these bits will rollover to ‘000’ after the last register
is accessed.
When Auto-Increment flag is set (AI = 1) and a read sequence is initiated, the sequence
must start by reading a register different from the Input register (B2 B1 B0
Only the 3 least significant bits are affected by the AI flag. Unused bits must be
programmed with zeroes.
Table 3.
The INPUT register reflects the state of the device pins. Writes to this register will be
acknowledged but will have no effect.
Table 4.
Remark: The default value ‘X’ is determined by the externally applied logic level (normally
logic 1) when used for directly driving LED with pull-up to V
B2
0
0
0
0
1
1
1
Bit
Symbol
Default
Fig 6.
B1
0
0
1
1
0
0
1
Reset state: 00h
Control register
Register summary
INPUT - Input register description
LED7
X
B0
0
1
0
1
0
1
0
7
Symbol
INPUT
PSC0
PWM0
PSC1
PWM1
LS0
LS1
Rev. 06 — 19 February 2009
LED6
6
X
Auto-Increment flag
0
LED5
Access
read only
read/write
read/write
read/write
read/write
read/write
read/write
X
5
0
0
LED4
AI
4
X
0
register address
Description
input register
frequency prescaler 0
PWM register 0
frequency prescaler 1
PWM register 1
LED0 to LED3 selector
LED4 to LED7 selector
B2
LED3
B1
002aac506
X
3
B0
DD
.
LED2
8-bit I
X
2
2
C-bus LED dimmer
PCA9531
© NXP B.V. 2009. All rights reserved.
LED1
X
1
0 0 0).
LED0
X
0
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