4-3
4.1.2 When previous line history control is not executed
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Preface
CTRL is always set to “Low”.
BCLR should be normally “High”. “Low” forcifully clears the selected block.
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Input of print data
Input of HDAT and HCLK transfer the print data to the shift register in serial input.
“High” means printing and “Low” means no-printing in HDAT.
HDAT data is read in at the rising edge of the HCLK inputs.
The transferred line of data is stored in the latch register by turning LATCH to “Low”.
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Selection of the heat block
BDAT and BCLK input transfer the selected block data in serial input.
“High” means selected and “Low” means unselected in BDAT.
BDAT data is read in at the rising edge of BCLK input.
13 bits selected data input corresponding to the 13 blocks are transferred in serial and the
corresponded blocks are selected.
The 1st input bit corresponds to the 1st block and the last input bit corresponds to the 13th block.
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Input of heat pulse
“High” of DST drivers heat elements of the thermal head. Then, let DST go to “Low after driving for
the period calculated using the formula shown in “2.6 CONTROLLING THE HEAD ACTIVATION
(DST) PULSE WIDTH”.
Repeat the selection of the driving block and input of the pulse to all blocks.
Содержание LTP3445
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