6

FN8241.3

September 5, 2006

SDA vs SCL Timing

A0, A1 Pin Timing

Pin Descriptions

Potentiometer Pins

equivalent to the fixed terminals of a mechanical

position of the wiper and not the voltage potential on the

terminals. With WR set to 127, the wiper will be closest to

R

W

terminal of a mechanical potentiometer. The position of the

wiper within the array is determined by the WR.

Bus Interface Pins

SERIAL DATA INPUT/OUTPUT (SDA)

The SDA is a bidirectional serial data input/output pin for the

device at the rising edge of the serial clock SCL, and it shifts

out data after each falling edge of the serial clock SCL.

SDA requires an external pull-up resistor, since it’s an open

drain input/output.

SERIAL CLOCK (SCL)

SCL requires an external pull-up resistor, since it’s an open

drain input.

DEVICE ADDRESS (A1-A0)

The Address inputs are used to set the least significant 2 bits

address serial data stream must be made with the Address

input pins in order to initiate communication with the

ISL95711. A maximum of 4 ISL95711 devices may occupy

SCL

SDA

(INPUT TIMING)

SDA

(OUTPUT TIMING)

SCL

SDA IN

A0, A1

Clk 1

START

STOP

Test Circuit

Equivalent Circuit

FORCE

CURRENT

TEST POINT

ISL95711