PCA9632DP2 datasheet(21/38 Pages) NXP

21 / 38 page

PCA9632_3

Product data sheet

Rev. 03 — 15 July 2008

21 of 38

NXP Semiconductors

PCA9632

4-bit Fm+ I2C-bus low power LED driver

Bus transactions

(1) 10-pin version only.

(2) See Table 5 for register deﬁnition.

Fig 15. Write to a speciﬁc register

A1 A0

slave address(1)

START condition

R/W

acknowledge

from slave

002aad043

data for register D3, D2, D1, D0(2)

0 D3 D2 D1 D0

control register

Auto-Increment flag

Auto-Increment options

acknowledge

from slave

acknowledge

from slave

STOP

condition

(1) 10-pin version only.

Fig 16. Write to all registers using the Auto-Increment feature

A1 A0

slave address(1)

START condition

R/W

acknowledge

from slave

002aad044

MODE1 register

control register

Auto-Increment on

Auto-Increment

on all registers

acknowledge

from slave

acknowledge

from slave

STOP

condition

(cont.)

MODE1

selection

MODE2 register

acknowledge

from slave

SUBADR3 register

acknowledge

from slave

ALLCALLADR register

acknowledge

from slave

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