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[When TOPIX compression mode is selected]
(1) Length: Total number of bytes of the graphic data (0001H ~ )
Ex. Length = 20 bytes:
(2) L1 parameter: Shows in which large block (512 dots/block) the changed data is contained.
(3) L2 parameter: Shows in which medium block (64 dots/block) the changed data is contained
(of the L1 large block).
(4) L3 parameter: Shows in which small block (8 dots/block) the changed data is contained (of
the L2 medium block).
Exclusive-OR is carried out between the current image data and the
image data one line previous. Only the changed bit is set to ON (1).
The alignment of dots is MSB (left dots) and LSB (right dots).
* The graphic width for only the smaller value of either the designated value or the max. buffer
size (512 KB) is drawn. The minimum unit of the data drawing is 8 dots (1 byte). If the
graphic width is set to 3 dots, it will be reset to 8 dots (1 byte).
L1
L1
Length
Graphic data
L2
L3
First line Second line
Range for length
4
012 3 5 6 7
L1
512 dots512 dots512 dots
0: Not present
1: Present
1 4
0 0
4
012 3 5 6 7
L2
64 dots64 dots64 dots
0: Not present
1: Present
4 012 3 5 6 7
L3
8 dots 8 dots 8 dots
0: Not present
1: Present