PCA9622DR datasheet(9/39 Pages) NXP

9 / 39 page

PCA9622_3

Product data sheet

Rev. 03 — 31 August 2009

9 of 39

NXP Semiconductors

PCA9622

16-bit Fm+ I2C-bus 100 mA 40 V LED driver

7.2 Control register

Following the successful acknowledgement of the slave address, LED All Call address or

LED Sub Call address, the bus master will send a byte to the PCA9622, which will be

stored in the Control register.

The lowest 5 bits are used as a pointer to determine which register will be accessed

(D[4:0]). The highest 3 bits are used as Auto-Increment ﬂag and Auto-Increment options

(AI[2:0]).

When the Auto-Increment ﬂag is set (AI2 = logic 1), the ﬁve low order bits of the Control

program the registers sequentially. Four different types of Auto-Increment are possible,

depending on AI1 and AI0 values.

Remark: Other combinations not shown in Table 3 (AI[2:0] = 001, 010, and 011) are

reserved and must not be used for proper device operation.

AI[2:0] = 000 is used when the same register must be accessed several times during a

single I2C-bus communication, for example, changes the brightness of a single LED. Data

is overwritten each time the register is accessed during a write operation.

AI[2:0] = 100 is used when all the registers must be sequentially accessed, for example,

power-up programming.

AI[2:0] = 101 is used when the 16 LED drivers must be individually programmed with

different values during the same I2C-bus communication, for example, changing color

setting to another color setting.

reset state = 80h

Remark: The Control register does not apply to the Software Reset I2C-bus address.

Fig 6.

Control register

Table 3.

Auto-Increment options

AI2

AI1

AI0

Function

no Auto-Increment

Auto-Increment for all registers. D[4:0] roll over to ‘0 0000’ after the last

Auto-Increment for individual brightness registers only. D[4:0] roll over to

‘0 0010’ after the last register (1 0001) is accessed.

Auto-Increment for global control registers only. D[4:0] roll over to

‘1 0010’ after the last register (1 0011) is accessed.

Auto-Increment for individual and global control registers only. D[4:0] roll

over to ‘0 0010’ after the last register (1 0011) is accessed.

002aac147

AI2

AI1

AI0

Auto-Increment flag

Auto-Increment options

PCA9622DR Datasheet(PDF) 9 Page - NXP Semiconductors

PCA9622DR Datasheet(HTML) 9 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

Datasheet Download

Link URL