SX8661Z datasheet(67/87 Pages) SEMTECH

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ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Revision v4.0, February 2016

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SX8661Z

Low Power, Capacitive Button Touch and Proximity Controller

(8 sensors) with LED Drivers and Analog Output

6.2

I2C read

The format of the I2C read is given in Figure 55.

After the start condition [S], the slave address (SA) is sent, followed by an eighth bit (‘0’) indicating a Write. The

SX8661Z then acknowledges [A] that it is being addressed, and the master responds with an 8 bit data consisting

of the Register Address (RA). The slave acknowledges [A] and the master sends the Repeated Start Condition

[Sr]. Once again, the slave address (SA) is sent, followed by an eighth bit (‘1’) indicating a Read.

The SX8661Z responds with acknowledge [A] and the Read Data byte (RD0). If the master needs to read more

data it will acknowledge [A] and the SX8661Z will send the next read byte (RD1). This sequence can be repeated

until the master terminates with a NACK [N] followed by a stop [P].

Start condition

SA:

Slave Address

Sr:

Repeated Start condition

Acknowledge

Not Acknowledge (terminating read stream)

RA:

RDn: Read Data byte (0...n)

Stop condition

from master to slave

from slave to master

RD0

optional

1 A

RD1

optional

RDn

Figure 55

I2C read

SX8661Z Datasheet(PDF) 67 Page - Semtech Corporation