This 8-bit value sets the pulse modulation scheme for the
transmitter. Setting this register will have effect only if IRCOM mode is
selected by the USART, and it must be configured before the USART transmitter is
enabled (TXEN).
| Value | Description |
|---|
| 0x00 |
3/16 of
the baud rate period pulse modulation is used. |
| 0x01-0xFE |
Fixed
pulse length coding is used. The 8-bit value sets the number of peripheral clock
periods for the pulse. The start of the pulse will be synchronized with the
rising edge of the baud rate clock. |
| 0xFF |
Pulse coding disabled. RX and TX signals pass through
the IRCOM module unaltered. This enables other features through the IRCOM
module, such as half-duplex USART, loop-back testing, and USART RX input
from an event channel. |
