Epson Stylus Color 440

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles
55
EEPROM
The EEPROM of St
y
lus COLOR 440, 640, and 740 contains the
followin
g
:

Ink cartrid
g
e consumption data
(
Blk, CMY
)

Ink waste pad counter

Printhead cleanin
g
information
(
keeps track of previous cleanin
g
operations
)

Destination information

Ad
j
ustment values
(
Bi-D, printhead volta
g
e ID, etc.
)

Default values set b
y
the user
As shown in the fi
g
ures below, the EEPROM connects to the
g
ate arra
y
(
IC2
)
b
y
4 lines which perform the followin
g
functions:

CS: Chip select si
g
nal

CK: Clock pulse

DI: Data in
(
writin
g
of serial data at power off
)

DO: Data out
(
readin
g
of serial data at power on
)
Figure 2-20. EEPROM Control Circuit for Stylus COLOR 440
Figure 2-21. EEPROM Control Circuit Stylus COLOR 640
Figure 2-22. EEPROM Control Circuit for Stylus COLOR 740
+5V
8
6
5
AT93C 46
(IC 1 1 )
Vcc
GND
ORG
E05B 44
(IC 2 )
127
128
126
125
1
2
3
4
CS
CK
DI
DO
ECS
ECK
ECO
ECI
+5V
8
6
5
AT93C 46
(IC 11)
Vcc
GND
ORG
E05B 43
(IC 2 )
130
129
128
127
1
2
3
4
CS
CK
DI
DO
ECS
ECK
ECO
ECI
+5V
8
6
5
AT93C 46
(IC 7 )
Vcc
GND
ORG
E05B 588
(IC 2 )
206
205
204
203
1
2
3
4
CS
CK
DI
DO
EECS
EECK
EECO
EECI