Font/Identity Cartridge Installation - Epson LQ-1050 Technical Manual

2.3.1.4 Font/Identity Cartridge Installation and Removal
The font and identity cartridges should not be installed or removed while the power is on. If this is done,
the ROUT signal must be set low to prevent a main board circuit malfunction.
After reset, the CPU starts execution from address
devices. The reset circuit in the
When a cartridge is mounted or removed, the exclusive OR value of
the reset default value, and the DISC signal is set low by the rising edge of the second pulse of the
synchronized
voltage drops to
VN,
ROUT signal goes high and the CPU restarts from address
the signals during this operation.
Also, Table 2-9 shows the relationship between the input at
state of cartridge.
—
Side
Stay
Not stay
Mounting
Removing
Mounting
Removing
counts 32
signal. Consequently, the
the DISC signal goes high and then it begins increasing. When it rises to Vp, the
Table 2-9. State of Cartridge
Mounting
Removing
Mounting
Removing
Not stay
and sends a RD signal to the external memory
pulses and then generates a
voltage begins decreasing. When the
Side
Stay
2-25
and
Figure 2-25 shows the timing of
and of
L
H
L
H
REV.-A
pulse.
changes from
and the
ROUT