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UART S3C2410A
11-12
UART CONTROL REGISTER (Continued)
UCONn Bit Description Initial State
Transmit Mode [3:2] Determine which function is currently able to write Tx data to the
UART transmit buffer register. (UART Tx Enable/Disable)
00 = Disable
01 = Interrupt request or polling mode
10 = DMA0 request (Only for UART0),
DMA3 request (Only for UART2)
11 = DMA1 request (Only for UART1)
00
Receive Mode [1:0] Determine which function is currently able to read data from UART
receive buffer register. (UART Rx Enable/Disable)
00 = Disable
01 = Interrupt request or polling mode
10 = DMA0 request (Only for UART0),
DMA3 request (Only for UART2)
11 = DMA1 request (Only for UART1)
00
NOTE: When the UART does not reach the FIFO trigger level and does not receive data during 3 word time in DMA receive
mode with FIFO, the Rx interrupt will be generated (receive time out), and the users should check the FIFO status
and read out the rest.