Epson 440 Manuale Utente
Chapter2 Operating Principles
Rev. A
2-25
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.
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.
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.
+5V
CS
CK
DI
DO
1
130
ECS
ECK
EDO
EDI
93C46(IC11)
E05B43(IC2)
VCC
ORG
GND
8
6
5
2
3
4
129
128
127
Figure 2-22. EEPROM Circuit Block Diagram