Brother TD-2120N - Manual (Page 69)

ESC/P Command Reference
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5. Control Command Details
When m=0, 1, 2, 3, 4, 6
 n1 and n2 indicate the number of dot positions.
n1: The remainder from dividing the number of dot positions by 256
n2: The quotient from dividing the number of dot positions by 256
B7 B6 B5 B4 B3 B2 B1 B0
Relationship between the image data and the dots
 First, the data is lined up in one row as follows:
1b
yte
1b
yte
1b
yte
1b
yte
…
1b
yte
1b
yte
n1+n2*256 bytes
MSB
LSB
 One dot of the image data is enlarged as follows, according to the value of m.
m=0 m =1 m =2 m =3 m =4 m =6
 As a result, the image is sized depending on the value of m, as follows:
m=0 48 dots vertically×(n1+n2*256)*6 dots horizontally
m=1 48 dots vertically×(n1+n2*256)*3 dots horizontally
m=2 48 dots vertically×(n1+n2*256)*3 dots horizontally
m=3 48 dots vertically×(n1+n2*256)*2 dots horizontally
m=4 48 dots vertically×(n1+n2*256)*4 dots horizontally
m=6 48 dots vertically×(n1+n2*256)*4 dots horizontally