USB flashing Note

I dont know which idiot invented this serial port stuff, but that you need to connect RXD-->TXD and TXD-->RXD makes totally no sense to me
[ph.bressy] This is the case for 99%9 of the serial connections

I wasted 2 hours trying to flash with TXD to TXD and RXD to RXD connection between USB flash tool and oven main board
[ph.bressy] It is written, that you should connect TxD to Rxd, and RxD to Txd page [Flashing the LPC21xx controller]

Just as en explanation: The transmit dataline (TXD) of one device is connected to the receive dataline (RXD) of another device, just the same as you would connect outputs of one device to the inputs of another...