MDS1526 P

3

Revision 051310

Integrated Device Technology, Inc. www.idt. com Tech Support: www.idt.com/go/clockhelp

(IDT™/ICS™)

Section 1 Overview

ICS1526 Data Sheet

1.4 I2C Bus Serial Interface

The ICS1526 uses a 5 volt tolerant, industry-standard

I2C-bus serial interface that runs at either low speed

(100 kHz) or high speed (400 kHz). The interface uses

12 word addresses for control and status: one

write-only, eight read/write, and three read-only

addresses.

Two ICS1526 devices can sit on the same I2C bus,

each selected by the Master according to the state of

the I2CADR pin. The 7-bit device address is 0100110

(binary) when I2CADR is low. The device address is

0100111 (binary) when I2CADR is high. See Section 4,

“Programming”