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S3C2416X RISC MICROPROCESSOR
UART
14-5
2.1.4 Non Auto-Flow Control (Controlling nRTS and nCTS by Software)
If users want to connect a UART to a Modem, disable auto flow control bit in UMCONn register and control the
signal of nRTS by software.
Example:
Rx Operation with FIFO
1. Select receive mode (Interrupt or DMA mode).
2. Check the value of Rx FIFO count in UFSTATn register. If the value is less than 32, users have to set the
value of UMCONn[0] to '1' (activating nRTS), and if it is equal or larger than 32 users have to set the
value to '0' (inactivating nRTS).
3. Repeat the Step 2.
Tx Operation with FIFO
1. Select transmit mode (Interrupt or DMA mode).
2. Check the value of UMSTATn[0]. If the value is '1' (activating nCTS), users write the data to Tx FIFO
register.
3. Repeat the Step 2.
2.1.5 RS-232C Interface
If the user wants to connect the UART to modem interface (instead of null modem), nRTS, nCTS, nDSR, nDTR,
DCD and nRI signals are needed. In this case, the users can control these signals with general I/O ports by
software because the AFC does not support the RS-232C interface.
Summary of Contents for S3C2416
Page 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Page 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Page 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Page 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Page 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Page 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Page 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Page 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Page 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Page 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Page 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...