ISP via Infrared UART

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by brownm on Tue Jun 10 01:29:41 MST 2014
Hi all

We are implementing ISP via an Infrared UART using a Vishay IRDA TFBS4711 Infrared transceiver

Datasheet here.

The datasheet states on page 7

TFBS4711 echoes the TXD signal at the RXD output during
transmission. For communication this signal is to be correctly
ignored by the controller or the software.

Is this a problem for the 11U68 or 11E68 (or any other LPC for that matter) while the device is in ISP boot mode? The user manual documentation doesn't mention anything about it being a problem.

It's not a problem when the 11U68 is running as we can disable the RX interrupts when we are transmitting.


Marshall Brown