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Po2
:
Print data output (seria output)
POo1
:
Print data shift clock
PHO:
Printer magnet data strobe signal
PHI:
Printer magnet data output enable signal
M1
Print magnet drive signal
Mio
VP:
Printer power
a
:
Printer timing signal
Mit:
Receipt side magnet common
Mi2.:
Journal side magnet common
Mi4_:
STAMP drive
M15:
Receipt feed
M16:
Journal feed
Printer control procedure
Printer is controtled mainly with CPU signals PHO, PH1, PO1,
PO2, a, and P22.
1) Make P22 high to drive the motor with the CPU. This activates
VP to rotate the printer motor.
2) a (Timing Signal) from the printer allows output of the first line
print data,
8) Print data is outputted serial-parallel converted in TC4094 and
internally latched by the strobe signal of PHO.
When PH1 output enabie signal is inputted. The latched data
is outputted as M1~M16.
4) The next & is detected and procedure 3) is repeated.
T4094
internai circuit
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Timing
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ovrivr
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as
&
ae
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ee
—10—
PAARL,
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