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STB
128CLK
CLK
5.75 MHz
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iststair
2nd stair
Srdstair
4thstair
5th stair
DATA1-16
paral [para
bata fat paral
a
I
128 data transmission as head one block|
In all 10 blocks of data are transferred in parallel.
(128 data x 10 = 1280 data)
Ped esiceesestieh sie
Stair Generation
4-6-2.
Basic Operation
All the signals are inputted to the head from the gate array IC601. This section only explains the operations for one block.
(The operations for the other blocks are the same.)
(1) The 128 data of print data are inputted to the shift register synchronized with CLK.
(2) When the STB pulse is inputted, the data inputted in (1) is moved from the shift register section to the latch section.
(3) When the DR pulse is inputted, the output stage transistors are switched ON/OFF by the "H" and "L" latch section data.
While the transistor is turned ON, the resistors heat up and thermosensitive paper changes color. The amount of heat
generated is controlled by varying the length of the DR pulses, so the color darkness of the printing on thermosensitive
paper can be varied.
Note:
The BEO terminal goes from "L" to "H' when starting the print, from "H" to "L" when print is ended.
UP-980CE(CE)
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up-980(UC)
4-15
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