PCA9632DP2,118【PDF 11/39 页】IC LED DRIVER RGBA 10-TSSOP

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NXP Semiconductors

PCA9632

4-bit Fm+ I 2 C-bus low power LED driver

7.3.1 Mode register 1, MODE1

Table 6. MODE1 - Mode register 1 (address 00h) bit description

Legend: * default value.

Bit

7

Symbol

AI2

Access

read only

Value

0

Description

Register Auto-Increment disabled

1*

Register Auto-Increment enabled

6

AI1

read only

0*

Auto-Increment bit 1 = 0

1

Auto-Increment bit 1 = 1

5

AI0

read only

0*

Auto-Increment bit 0 = 0

1

Auto-Increment bit 0 = 1

4

SLEEP

R/W

0

Normal mode [1] .

1*

Low power mode. Oscillator off [2] .

3

SUB1

R/W

0*

PCA9632 does not respond to I 2 C-bus subaddress 1.

1

PCA9632 responds to I 2 C-bus subaddress 1.

2

SUB2

R/W

0*

PCA9632 does not respond to I 2 C-bus subaddress 2.

1

PCA9632 responds to I 2 C-bus subaddress 2.

1

SUB3

R/W

0*

PCA9632 does not respond to I 2 C-bus subaddress 3.

1

PCA9632 responds to I 2 C-bus subaddress 3.

0

ALLCALL

R/W

0

PCA9632 does not respond to LED All Call I 2 C-bus address.

1*

PCA9632 responds to LED All Call I 2 C-bus address.

[1]

[2]

It takes 500 ? s max. for the oscillator to be up and running once SLEEP bit has been set to logic 0. Timings on LEDn outputs are not

guaranteed if PWMx, GRPPWM or GRPFREQ registers are accessed within the 500 ? s window.

When the oscillator is off (Sleep mode), the LED outputs cannot be turned on, off or dimmed/blinked.

7.3.2 Mode register 2, MODE2

Table 7. MODE2 - Mode register 2 (address 01h) bit description

Legend: * default value.

Bit

7

6

5

Symbol

-

-

DMBLNK

Access

read only

read only

R/W

Value

0*

0*

0*

Description

reserved

reserved

Group control = dimming

1

Group control = blinking

4

INVRT [1]

R/W

0*

Output logic state not inverted. Value to use when no external driver used.

1

Output logic state inverted. Value to use when external driver used.

3

OCH

R/W

0*

Outputs change on STOP command. [2]

1

Outputs change on ACK.

2

OUTDRV [1]

R/W

0*

The 4 LED outputs are configured with an open-drain structure.

1

The 4 LED outputs are configured with a totem pole structure.

1 to 0

OUTNE[1:0]

R/W

01*

unused

[1]

[2]

See Section 7.6 “ Using the PCA9632 with and without external drivers ” for more details. Normal LEDs can be driven directly in either

mode. Some newer LEDs include integrated Zener diodes to limit voltage transients, reduce EMI, protect the LEDs, and these must be

driven only in the open-drain mode to prevent overheating the IC.

Change of the outputs at the STOP command allows synchronizing outputs of more than one PCA9632. Applicable to registers from

02h (PWM0) to 08h (LEDOUT) only.

PCA9632

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 5 — 27 July 2011

? NXP B.V. 2011. All rights reserved.

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