Planar LookThru Transparent OLED Display User Manual
020-1380-00B
Page | 26
IR Command Protocol
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
06
F9
01
FE
Binary
00000110
11111001
00000001
11111110
Function
Address Byte
1
Address Byte
2
Command
Command (Logical
Inverse)
Leader Pulse
0 0 0 0 0
0
1
1
9 ms
4.5 ms
Address Byte 1
Address Byte 2
Command Byte
Command Byte (logical inverse)
0 0
0 0 0 0 0 0 0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
End Pulse
13.5 ms
27 ms
27 ms
