Planar LookThru LO552 User Manual page 26

IR Command Protocol
The Planar LookThru displays accept commands in the form of IR signals that conform to
the NEC protocol. Each Planar LookThru remote control has an NEC control code
associated with it. These codes can be used to program a third-party "universal" remote
control to work with the Planar LookThru displays. These third-party products usually
come with a computer software application for this purpose. For more information, consult
the documentation provided with the remote control.
The IR control codes have the following characteristics:

Each code consists of the following:

A leader pulse (a modulated pulse of 9 ms followed by a non-modulated pulse of
4.5 ms)

16 address bits. The default address is 1785 (0x06F9, binary 00000110
11111001)

16 data bits: eight (8) bits for the command followed by the logical inverse of the
command

An end pulse (a modulated pulse of 0.56 ms, similar to the modulated pulse in
the '0' and '1' bits). The end of the modulated pulse constitutes the end of the
data transmission.

The carrier frequency is 38 kHz, with the modulated pulses having a 33% duty cycle.

Commands are sent at a maximum rate of 9 Hz.
For example, below is the NEC control code for the ON button of the Planar LookThru
remote control (assuming the default address is used).
Hex
Binary
Function
Leader Pulse
9 ms 4.5 ms 0 0 0 0 0
13.5 ms
Planar LookThru Transparent OLED Display User Manual
020-1380-00D
06 F9
00000110 11111001
Address Byte Address Byte
1 2
Address Byte 1 Address Byte 2
1 1 0 1 1 1 1
27 ms
01
00000001
Command (Logical
Command
Command Byte
1 0 0 1 0 0 0 0 0 0 0 1 1
IR Command Protocol
FE
11111110
Inverse)
Command Byte (logical inverse)
1 1 1 1 1 1 0
27 ms
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