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Vertical Direction Horizontal Direction
Dots
Dot Density Dot Density
Max. Dots
0 8-dot single density 8 67 DPI 101 DPI 192
1 8-dot double density 8 67 DPI 203 DPI 384
20 24-dot single density 24 203 DPI 101 DPI 192
21 24-dot double density 24 203 DPI 203 DPI 384
ESC * m n1 n2 [d] k
[Function] Specifying the Bit Image Mode
[Code] <1B>H<2A>H<m><n1><n2> [d] k
[Range] {m= 0, 1, 20, 21(Hex)}
{0 =< n1 =< FF(Hex)}
{0 =< n2 =< 1(Hex)}
{0 =< d =< FF(Hex)}
{k = n1 + FF(Hex) x n2} (m=0, 1(Hex)) Number of bytes containing image data
{k = (n1 + FF(Hex) x n2) x 3} (m=20, 21(Hex)) Number of bytes containing image data
[Outline] According to the number of dots specified in n1, n2, specify the bit image of mode m.
• The No. of dots printed is divided by 256, whose quotient is taken as n2 and residual
as n1.
• Bit image data is sent starting from the top to bootom and from the left to right
(vertical columns scanning). In modes m=0, and 1 only one byteper column is sent
and in mode m-20h, 21h 3 bytes for each column are sent.
• d is bit image data, the bits subject to printing are taken as “1” and those not as
“0”.
• The bit image modes specified by m are shown as follows:
[Caution] • When the values set in m (bit image mode) are out of the above range, the data
following after n1 is processed as normal printing data.
• After completion of bit image printing, printer returns to normal data processing
mode.
• Line space is automatically set to 0.
Modem (Hex)