IRMAN PROTOCOL

                         Universal Infrared Receiver

                              Interface Protocol

-- Serial settings

   The settings of the serial port must be 9600 Baud, 1 stop bit, no parity and no flow-control.

-- Initialization

1) The device is powered up by setting RTS and DTR high on the host. 

After a few milliseconds the microcontroller is up and running. During 

powerup the output pins of the microcontroller are not yet stable.

This gives some garbage on the RXD line of the host. So clear the input

fifo on the host, a few milliseconds after setting RTS and DTR high.

2) Next the host must send a character 'I' and a character 'R' with at

least a 500 microsecond delay in between. The microntroller responds with

sending the characters 'O' and 'K'. 

3) Now the initialization is done and the microcontroller will start 

sending decoded infrared-trains to the host from this point on.

-- Receiving Remote Keypresses

Once the device is initialized, the microcontroller sends 6 bytes to the

host, every time a decodable infrared pulsetrain comes in from the infrared

receiver. These 6 bytes are pseudorandom, but constant for every specific

key on a remote.