Register values in UART

[rudomanenko]

Hi! I am using LPC11uxx and trying to configurate UART smart card mode. When I filled register DLM value, IER also fiiled by the same value? Is it normal? If yes, why it is happens? 

[jeremyzhou]

Hi Anton Rudomanenko,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1） When I filled register DLM value, IER also filled by the same value?
-- Yes, their address is identical, however, the value of DLAB bit determine the writing value be valid or not.

Have a great day,
TIC

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[rudomanenko]

thanks a lot, jeremyzhou, but I can't show you code and hardware - it's private project