ESC U n, Esc @ | Citizen Systems iDP-3550, iDP-3551 specification

ESC "U" n

[Function]	Selecting the Unidirectional/Bidirectional print mode
[Code]	<1B>H <55>H n
[Range]	0 ≤ n ≤ 255
[Outline]	This command selects or deselects unidirectional print.

		n0 = 0	Bidirectional print
		n0 = 1	Unidirectional print
ESC "@"
[Function]	Initializing the printer
[Code]	<1B>H <40>H
[Outline]	This command cancels various conditions set after power-on to initializes the printer to the
	conditions having existed at power-on. However, the input buffer is not initialized.