SD1200 Datasheet, PDF (20/35 Pages) List of Unclassifed Manufacturers – Analog-Interface XGA/SXGA TFT LCD Display Controller

SmartASIC, Inc.
SD1200
PRELIMINARY DATA SHEET
3.5. EEPROM interface
As mentioned in previous sections, the external EEPROM stores much crucial
information for the SD1200 internal operations. The SD1200 interfaces with the
EEPROM through a 2-wire I²C serial interface. The suggested EEPROM device is an
industry standard serial-interface EEPROM (24x08). The I²C interface scheme is
briefly described here and detail description can be found in many public literatures.
3.5.1.
I²C serial interface
The I²C serial interface used 2 wires, SCL and SDA. The SCL is driven by the
SD1200, and used mainly as the sampling clock and the SDA is a bi-directional signal
and used mainly for data signal. Figure 4 shows the basic bit definitions of I²C serial
interface.
The I²C serial interface supports random read and sequential read operations. Figure 5
and 6 shows the data sequences for random read and sequential read operations.
Figure 4: START, STOP AND DATA Definitions in I²C serial interface
START
DATA
DATA
STABLE
CHANGE
DATA
CHANGE
STOP
September, 1998
SmartASIC Confidential
20