NEC NP-M311W Command Manual page 38

Command example:
* Sending the AUTO key code
02H 0FH 00H 00H 02H 05H 00H 18H
* Sending the AUTO (SHORT) key code
02H 0FH 00H 00H 02H DDH 00H F0H
------------------------------------------
* cycle/toggle volume mute
* cycle/toggle picture mute
* cycle/toggle picture freeze
02H 0FH 00H 00H 02H DATA01 DATA02 CKS
Data Portion Contents
--------------------------------------------------------------------
DATA01/DATA02 12H/00H : Volume mute
DATA01/DATA02 11H/00H : Picture mute
DATA01/DATA02 8AH/00H : Picture freeze
------------------------------------------
* cycle aspect ratio
02H 0FH 00H 00H 02H DATA01 DATA02 CKS
Data Portion Contents
--------------------------------------------------------------------
DATA01/DATA02 A3H/00H : Aspect Ratio
------------------------------------------
* all menu functionality (digits 0-9, cursor movement, enter, select, return, back, clear, etc)
02H 0FH 00H 00H 02H DATA01 DATA02 CKS