Blackfin Irda

Hi I am interested in having the information on the Analog Devices ADSP-BF535 Blackfin Hardware Reference Manual: Irda Transmitter Description?

[Pathak]

IrDA Transmitter Description is as mentioned below for the information on the Analog Devices ADSP-BF535 Blackfin Hardware Reference Manual.

Irda Transmitter Description

To create the IrDA beat transmitted by the UART, the typical NRZ yield of the transmitter is initially altered, so a 0 is transmitted as a high beat of 16 UART clock periods and a 1 is transmitted as a low heartbeat for 16 UART clock periods. The main edge of the beat is then deferred by six UART clock periods. Correspondingly, the trailing edge of the beat is truncated by eight UART clock periods.

This outcomes in the last representation of the first 0 as a high beat of just 3/16 check periods in a 16-cycle UART clock period. The beat is revolved around the center of the bit time, as appeared in figure below. The last IrDA heartbeat is nourished to the off-chip infrared driver.



This regulation methodology guarantees a heartbeat width yield from the UART of three cycles high out of each 16 UART clock cycles.

The blunder terms connected with the baud rate generator are little and well inside the resistance of generally infrared handset details.