Toshiba B-EP Series Interface Specification page 416

nn: Data length (including start/stop codes)
00 to 32
o: Data code
1: JIS8 code
2: Packed BCD code (only for IrDA: TEC Protocol)
p: Fixed data No.
0 (Fixed value)
CHAPTER 6 LABEL MODE (INTERFACE COMMANDS)
NOTE: When "00" is designated, the length is equivalent to
the data sent by the Data Print Command.
JIS8 code: Data which is delimited by [LF]
Packed BCD code: Data which is delimited by "F"
6-35
B-EP Series