X24C02 Datasheet, PDF (3/16 Pages) Xicor Inc. – Serial E2PROM

X24C02
DEVICE OPERATION
The X24C02 supports a bidirectional bus oriented pro-
tocol. The protocol defines any device that sends data
onto the bus as a transmitter and the receiving device as
the receiver. The device controlling the transfer is a
master and the device being controlled is the slave. The
master will always initiate data transfers and provide the
clock for both transmit and receive operations. There-
fore, the X24C02 will be considered a slave in all
applications.
Figure 1. Data Validity
Clock and Data Conventions
Data states on the SDA line can change only during SCL
LOW. SDA state changes during SCL HIGH are re-
served for indicating start and stop conditions. Refer to
Figures 1 and 2.
Start Condition
All commands are preceded by the start condition,
which is a HIGH to LOW transition of SDA when SCL is
HIGH. The X24C02 continuously monitors the SDA and
SCL lines for the start condition and will not respond to
any command until this condition has been met.
SCL
SDA
DATA STABLE DATA
CHANGE
3838 FHD F06
3