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**
Relationship Between Data and Dot Wires
**
Fig. 3-6 shows the relationship between the graphic data and the dot wires
in the print head.
Dot Wire of
Print Head
Upper
. 1 - - - - - - - - '
.~------------~
.~--------------~
Lower
•
7-bit Interface
8-bit Interface
Fig. 3-6
Relationship Between Data
&
Dot Wires
If a bit is "1", the print head fires.
If a bit is "0", the print head
does not fire.
For example, assume that data are given as follows;
"0"
"0"
110
11
•
"1"
•
"I"
"0"
"0"
•
"1°
"0"
"0"
•
"1"
•
1'1"
"0"
"0"
110"
•
111
1 '
(Example A)
(Example B)
where a box with "." denotes the bit "1" and a blank box denoted the bit "0".
According to the chart in Appendix, you can define "00100100" in binary as
"24" in hexadecimal, "36" in decimal for the example A, and "01010101" in
binary as "55" in hexadecimal, "85" in decimal for the example B.
As you can see the first 4 bits are defined from column and the second
4 bits are defined from row.
Namely, "0010" in binary
=
"2" in hexadecimal and "0100" in binary
hexadecimal.
-35-
"4" in
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