LSI Logic Confidential
15-88
Serial I/O Port
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
When changing from FIFO mode to NS16450 mode and
vice versa, data is automatically cleared from the FIFOs.
This bit must be 1 when other FCR bits are written to, or
they will not be programmed. If the user wishes to have
the DMA Engine automatically fill/drain the UART FIFOs
with data, then this bit must be set to 1 to have the FIFOs
enabled in the first place.
By default, non-FIFO mode is enabled.
UART1 Line Control Register (UART1_LCR)
UART2 Line Control Register (UART2_LCR)
Offset = 0xBE010C / 0xBE018C
Read/Write
Default = 0x0000 0000
The UART is configured to operate as follows:
•
Transmit 5 bits/character and 1 stop bit
•
Parity disabled
•
Odd parity selected
•
SP is 0, SB is disabled, DLAB is 0
which means that the first access to the DLL-THR-RBR and the DLM-
IER registers will not be to baud generator registers.
DLAB
Divisor Latch Select
31
1 = Select the divisor latches to be accessed during
read/write operations to the DLL-THR-RBR and the DLM-
IER registers.
SB
Set Break
30
1= The SOUT pin goes low.
31
30
29
28
27
26
25
24
23
16
DLAB
SB
SP
EPS
PEN
STB
WLS1
WLS0
RSVD
15
0
RSVD