LPUART vs DUART

[RajanBedi]

Hello,

What's the difference between the LS1046's LPUART vs DUART functions and do they support RS232, RS422 and RS485?

Is an external PHY required to translate between the LS1046's logic levels and the serial bus voltages?

[mrudangshelat-13]

Hi @RajanBedi,

The main difference between DUART and LPUART is DMA support. LPUART support DMA but there is no support in DUART.

DUART is standard 16550-compatible UART with 64 byte FIFO and character length 5-8 bits.
As in general 16550 UART, you can use parity bit as 9th bit of data. For LPUART - FIFO size is only 4 characters, character length 8,9 or 10 bits.

For more details, you can refer to LS1046ARM.

No, LS1046A doesn't supports RS232, RS422 and RS485 protocol.

Regards,
Mrudang