The UARTS in the LPC15xx have both a STAT and an INTSTAT register.
Is there any difference in reading a UART's STAT register vs. INTSTAT?
Put another way, if an interrupt flag bit is set in INTSTAT will it always be set in STAT also?
Is there any reason to use INTSTAT instead of STAT in an ISR? (Understanding that INTSTAT is read only and may include bits that are not interrupt flags.)