PCA9635_7

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 07 — 16 July 2009

9 of 35

NXP Semiconductors

PCA9635

7.3 Register definitions

[1]

Only D[4:0] = 0 0000 to 1 1011 are allowed and will be acknowledged. D[4:0] = 1 1100 to 1 1111 are reserved and will not be

acknowledged.

[2]

When writing to the Control register, bit 4 must be programmed with logic 0 for proper device operation.

Table 4.

Register summary[1][2]

Register number (hex)

D4

D3

D2

D1

D0

Name

Type

Function

00

00000

MODE1

read/write

Mode register 1

01

00001

MODE2

read/write

Mode register 2

02

00010

PWM0

read/write

brightness control LED0

03

00011

PWM1

read/write

brightness control LED1

04

00100

PWM2

read/write

brightness control LED2

05

00101

PWM3

read/write

brightness control LED3

06

00110

PWM4

read/write

brightness control LED4

07

00111

PWM5

read/write

brightness control LED5

08

01000

PWM6

read/write

brightness control LED6

09

01001

PWM7

read/write

brightness control LED7

0A

01010

PWM8

read/write

brightness control LED8

0B

01011

PWM9

read/write

brightness control LED9

0C

01100

PWM10

read/write

brightness control LED10

0D

01101

PWM11

read/write

brightness control LED11

0E

01110

PWM12

read/write

brightness control LED12

0F

01111

PWM13

read/write

brightness control LED13

10

10000

PWM14

read/write

brightness control LED14

11

10001

PWM15

read/write

brightness control LED15

12

10010

GRPPWM

read/write

group duty cycle control

13

10011

GRPFREQ

read/write

group frequency

14

10100

LEDOUT0

read/write

LED output state 0

15

10101

LEDOUT1

read/write

LED output state 1

16

10110

LEDOUT2

read/write

LED output state 2

17

10111

LEDOUT3

read/write

LED output state 3

18

11000

SUBADR1

read/write

19

11001

SUBADR2

read/write

1A

11010

SUBADR3

read/write

1B

11011

ALLCALLADR

read/write