Bar Code Descriptor For Maxicode - Lexmark T656 Technical Reference Manual

This example prints a PDF417 bar code with the following settings:
• ECC Level 4
• X dimension = 8/600ths
• Y Ratio = 16/600ths
• Non-truncated
• Aspect Ratio = 1:4
Note: Using this Aspect Ratio, the bar code symbol is constructed as nearly as possible
with a height-to-width ratio of 1:4.
PCL5 Data:
ESC
&x16W0001 04 02 0008 02 00 00 00 01 04 0000 0000
ESC
&y39WHere_are_39_bytes_of_data_to_be_encoded
Note that the bar code descriptor data is in bold. Each digit is really a hex nibble. Two nibbles make
each byte and thus there are 32 nibbles. Each descriptor field is separated by a space to make the
header more readable. These spaces would not be sent with the data.

Bar code descriptor for MaxiCode

Below is the header definition of the bar code descriptor for MaxiCode:
Bytes MSB
0 – 1 Symbology ID byte 1 (00x)
2 – 3 Mode
Symbology ID bytes 0 and 1: (Required = 00 02x)
These two bytes signify the symbology. All bar code descriptors must reserve the first two bytes for
the symbology ID so the remaining bytes can be interpreted accordingly, because most descriptors
are of different sizes and information. For MaxiCode, these two bytes must be 00x and 02x.
Mode: (Default = 02x)
This field designates what mode to use when interpreting the input data. Valid modes are (in hex):.
Value Description
02x Structured carrier message with numeric postal code
03x Structured carrier message with alphanumeric postal code
04x Standard symbol with standard error correction
05x Full symbol with enhanced error correction
06x Reader program with standard error correction
Two-dimensional bar codes
52
LSB
Symbology ID byte 2 (02x)
Reserved