Using Discrete Ir Codes; Ir Command Protocol - Planar ultrares User Manual

Using Discrete IR Codes

The UltraRes display accepts commands in the form of IR signals that conform to the
NEC protocol. Each UltraRes remote control has an NEC control code associated with
it. You can use these codes to program a third-party "universal" remote control to
work with the UltraRes. 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.

IR Command Protocol

The IR control codes have the following characteristics:
For example, below is the NEC control code for the ON button of the UltraRes remote
control (assuming the default address is used).
Binary
Function
The following example shows the pulse train for this command.
• 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.
Hex 06
00000110
Address Byte 1 Address Byte 2
Planar UltraRes User Manual
F9 01
11111001 00000001
Command
Using Discrete IR Codes
FE
11111110
Command (Logical
Inverse)
112