Samsung S5PC110 Manual page 822

S5PC110_UM
1.6.1.4 UART Modem Control Register
•
UMCON0, R/W, Address = 0xE290_000C
•
UMCON1, R/W, Address = 0xE290_040C
•
UMCON2, R/W, Address = 0xE290_080C
•
Reserved (Address = 0xE290_0C0C)
There are three UART MODEM control registers in the UART block, namely, UMCON0, UMCON1 and UMCON2.
UMCONn
Reserved
RTS trigger Level
Auto Flow Control (AFC)
Modem Interrupt Enable
Reserved
Request to Send
NOTE: UART 2 supports AFC function, if nRxD3 and nTxD3 are set as nRTS2 and nCTS2 by GPA1CON.
UART 3 does not support AFC function, because the S5PC110 has no nRTS3 and nCTS3.
Bit
[31:8] Reserved
[7:5] Determines the trigger level of Rx FIFO to control nRTS
signal. If AFC bit is enabled and Rx FIFO have bytes that are
greater than or equal to the trigger level, nRTS signal is
deactivated.
[Channel 0]
000 = 255 bytes
010 = 192 bytes
100 = 128 bytes
110 = 64 bytes
[Channel 1]
000 = 63 bytes
010 = 48 bytes
100 = 32 bytes
110 = 16 bytes
[Channel 2]
000 = 15 bytes
010 = 12 bytes
100 = 8 bytes
110 = 4 bytes
[4] 0 = Disables
1 = Enables
[3] 0 = Disables
1 = Enables
[2:1] These bits must be 0
[0] If AFC bit is enabled, this value will be ignored. In this case
the S5PC110 controls nRTS signals automatically.
If AFC bit is disabled, the software must control nRTS signal.
0 = 'H' level (Inactivate nRTS)
1 = 'L' level (Activate nRTS)
1 UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER
Description
001 = 224 bytes
011 = 160 bytes
101 = 96 bytes
111 = 32 bytes
101 = 6 bytes
111 = 2 bytes
001 = 56 bytes
011 = 40 bytes
101 = 24 bytes
111 = 8 bytes
001 = 14 bytes
011 = 10 bytes
Initial State
0
000
0
0
00
0
1-20