Brother TD-2120N - Manual (Page 36)

Raster Command Reference
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4. Printing Command Details
Explanation of “TIFF compression mode”
With compression, the data for the “raster graphics transfer” command is based on 56 bytes
(TD-2020/2120N) or 84 bytes (TD-2130N) of the total number of pins (TD-2020/2120N: 448 and TD-2130N:
672). As shown below, with no compression, the sum of the number of offset pins and the number of pins
within the print area is the byte data. However, with compression, the number of unused pins is also added to
the data. In other words, with compression, this becomes 104 bytes when it is expanded by the printer,
regardless of the tape width.
0 pin
Last byte
First byte
Tape margin
Raster line with
compression
Feeding direction
Print area
Pins on print head
Number of
print area
pins
Number
of offset
pins
Total
number
of pins
Number
of unused
pins
Raster line with
no compression