PCA9532D NXP Semiconductors, PCA9532D Datasheet - Page 5

• Manufacturer Part Number: PCA9532D
• Description: LED Drivers I2C LED DIMMER 16BIT
• Manufacturer: NXP Semiconductors

Specifications of PCA9532D

• Number Of Digits: 16
• Low Level Output Current: 6.5 mA
• Operating Supply Voltage: 2.3 V to 5.5 V
• Maximum Supply Current: 200 mA
• Maximum Power Dissipation: 400 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-137
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PCA9532D,112

NXP Semiconductors
6. Functional description
PCA9532_4
Product data sheet
6.1 Device address
6.2 Control register
Refer to
Following a START condition, the bus master must output the address of the slave it is
accessing. The address of the PCA9532 is shown in
internal pull-up resistors are incorporated on the hardware selectable address pins and
they must be pulled HIGH or LOW.
The last bit of the address byte defines the operation to be performed. When set to logic 1
a read is selected, while a logic 0 selects a write operation.
Following the successful acknowledgement of the slave address, the bus master will send
a byte to the PCA9532, which will be stored in the Control register.
The lowest 4 bits are used as a pointer to determine which register will be accessed.
If the Auto-Increment (AI) flag is set, the four 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 ‘0000’ 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 INPUT0 register
(B3 B2 B1 B0
Only the 4 least significant bits are affected by the AI flag. Unused bits must be
programmed with zeroes.
Fig 5.
Fig 6.
Figure 1 “Block diagram of
PCA9532 slave address
Reset state: 00h
Control register
0 0 0 0).
Rev. 04 — 17 March 2009
Auto-Increment flag
1
0
1
0
fixed
PCA9532”.
slave address
0
0
AI
0
A2
B3
register address
selectable
hardware
A1
B2
Figure
A0 R/W
B1
002aae523
002aac505
B0
5. To conserve power, no
16-bit I
2
C-bus LED dimmer
PCA9532
© NXP B.V. 2009. All rights reserved.
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