Eeprom Control Circuits - Epson Stylus Color 600 Service Manual

2.2.2.3 EEPROM Control Circuits

The EEPROM of Stylus Color 600 has following contents. Gate array E05B43(IC2) controls operations of
reading data when the power is on and writing data when the power is off.

Ink consumption(Bk, CMY)

CL counter(Various cleaning operations that are previously done are memorized)

Destination information

Information of various adjustment values(Bi-D, VH voltage, etc.)

CPSI pass word

Other various setting values by the user
EEPROM is connected to the Gate array by 4 lines and performs following functions.
The figure below shows EEPROM control circuit.

CS : Chip selection signal

CK : Data synchronism clock pulse

DI : Data writing line(serial data) at power off.

DO : Data reading line(serial data) at power on.
Rev. A
Figure 2-22. EEPROM Circuit Block Diagram
Chapter2 Operating Principles
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