Table 6.12.5-6 Uart Controller Interrupt Source And Flag List - Nuvoton ISD94124BYI Technical Reference Manual

Table 6.12.5-6 describes the interrupt sources and flags. When an interrupt occurred, its
corresponding flag will be raised (set). Software should clear the interrupt flag after the interrupt is
generated. Writing 1 (to flag) clears the interrupt flag.
Interrupt
Interrupt Source
Indicator
Receive Data Available
RDAINT
Interrupt
Transmit Holding
Register Empty THERINT
Interrupt
Transmitter Empty
TXENDINT
Interrupt
Receive Line Status
RLSINT
Interrupt
Modem Status Interrupt MODEMINT MODEMIEN
Receiver Buffer Time-
RXTOINT
out Interrupt
Buffer Error Interrupt BUFERRINT BUFERRIEN
Wake-up Interrupt WKINT
Auto-Baud Rate
ABRINT
Interrupt

Table 6.12.5-6 UART controller Interrupt Source and Flag List

6.12.5.8 UART Function Mode
The UART controller provides UART function (Setting FUNCSEL (UART_FUNCSEL [1:0]) to '00'
to enable UART function mode). The UART baud rate is up to 921 Kbps.
The UART provides full-duplex and asynchronous communications. The transmitter and receiver
each has 16-byte FIFO. User can program receiver buffer trigger level and receiver buffer time-out
detection for receiver. The transmitting data delay time between the last stop and the next start bit
can be programed by setting DLY (UART_TOUT [15:8]) register. The UART supports hardware
Sep 9, 2019
ISD94100 Series Technical Reference Manual
Interrupt Enable
Interrupt Flag
Bit
RDAIEN RDAIF
THREIF
THREIEN
TXENDIEN TXENDIF
RLSIEN RLSIF
MODEMIF
RXTOIEN RXTOIF
BUFERRIF
WKIEN WKIF
ABRIEN ABRIF
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Flag Caused By Flag Cleared By
N/A Read UART_DAT
N/A Write UART_DAT
N/A Write UART_DAT
RLSIF = BIF Write '1' to BIF
RLSIF = FEF Write '1' to FEF
RLSIF = PEF Write '1' to PEF
RLSIF = ADDRDETF Write '1' to ADDRDETF
MODEMIF =
Write '1' to CTSDETF
CTSDETF
N/A Read UART_DAT
BUFERRIF =
Write '1' to TXOVIF
TXOVIF
BUFERRIF =
Write '1' to RXOVIF
RXOVIF
WKIF = CTSWKF Write '1' to CTSWKF
WKIF = DATWKF Write '1' to DATWKF
WKIF = RFRTWKF Write '1' to RFRTWKF
WKIF = RS485WKF Write '1' to RS485WKF
WKIF = TOUTWKF Write '1' to TOUTWKF
ABRIF = ABRDIF Write '1' to ABRDIF
ABRIF = ABRDTOIF Write '1' to ABRDTOIF
Rev1.09