Specifications

REV.-A

2.3.10 EEPROM Control Circuit

This printer is provided with an

EEPROM

to store the data such as panel settings, paper position data

(Paper cut position/Current printed line), wasted ink drain tank replacement counter, etc. when the main

power is OFF. When the main power is ON, the data is stored in the RAM. But the data in the RAM will

be erased as soon as the main power is turned off. To maintain the data, this printer monitors +35

VDC

line through PST529C

(IC7)

and, as soon as the voltage goes lower than +25

VDC

(approx.),

transfers the data from the RAM to the

EEPROM.

The data in

EEPROM

is read/written by/to E05A65 in serial mode.

+35VDC

PST529C

CPU

BUS

Serial

EEPROM

(IC7)

E05A65

(IC2)

NMI (IC12)

(IC5)

RAM

Figure 2-51.

EEPROM

Control Circuit

..,

;

(-‘

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