XR17D154 Exar Corporation, XR17D154 Datasheet - Page 30

• Manufacturer Part Number: XR17D154
• Description: Four-channel Pci-bus Uart
• Manufacturer: Exar Corporation

áç
áç
áç
áç
PRELIMINARY
T
A
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 1
0 0 0 1
0 0 1 0
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 0
1 0 1 1
1 0 1 1
ABLE
A3-A0
DDRESS
11: UART CHANNEL CONFIGURATION REGISTERS DESCRIPTION.
RXTRG
TXTRG
RXCNT
TXCNT
FCTR
N
MCR
RHR
DLM
MSR
MSR
THR
FCR
LCR
SPR
EFR
R
DLL
LSR
IER
ISR
AME
EG
W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
EAD
RITE
W
W
W
W
W
R
R
R
R
R
/
Auto CTS/
DSR# Int.
Prescaler
RX FIFO
RX FIFO
Enable
Enable
Trigger
Divisor
Enable
RS485
Enable
E
FIFOs
DLY-3
B
CTS/
Table
BRG
DSR
Bit-7
Bit-7
Bit-7
Bit-7
Bit-7
TRG
Bit-7
Bit-7
Bit-7
Bit-7
RROR
Bit-1
CD
IT
0/
0/
-7
Auto RTS/
DTR# Int.
RX FIFO
Enable
Enable
Trigger
Set TX
Enable
RS485
Enable
Empty
FIFOs
Break
DLY-2
B
Table
RTS/
Bit-6
Bit-6
Bit-6
Bit-6
Bit-6
TRG
DTR
Bit-6
Bit-6
Bit-6
Bit-6
TSR
Bit-0
IR
RI
IT
0/
0/
-6
Set Parity Even Par-
Xon/Xoff/
Sp. Char.
Flow Cntl
TX FIFO
XonAny
Special
Enable
Trigger
RS485
RS485
Enable
Empty
Select
Delta-
DLY-1
B
DSR
Char
Bit-5
Bit-5
Bit-5
Bit-5
THR
Bit-5
Auto
Bit-5
Bit-5
Bit-5
Bit-5
Int.
IT
0/
0/
0/
0/
-5
30
RS485 DLY-
MCR[7:5,2]
RX Break
FCR[5:4],
IER [7:5],
ISR [5:4],
MSR[7:4]
Xoff/spe-
TX FIFO
RX Input
cial char
Lopback
Invert IR
Internal
Trigger
Enable
Enable
UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART
B
Bit-4
Bit-4
Bit-4
Bit-4
CTS
Bit-4
Bit-4
Bit-4
Bit-4
Bit-4
IT
ity
0/
0/
0
0
-4
Status Int.
RX Fram-
Reserved Reserved Reserved Reserved
RTS/DTR
Hyst Bit-3
Flow Cntl
ing Error
Software
Modem
Source
Enable
Enable
(OP2)
Mode
Parity
B
Delta
DMA
Bit-3
Bit-3
Bit-3
Bit-3
Bit-3
CD#
Bit-3
Bit-3
Bit-3
Bit-3
Bit-3
Bit-3
INT
IT
-3
1
Status Int.
Hyst Bit-2
RTS/DTR
RX Parity
RTS/DTR
Flow Cntl
Stop Bits
Software
TX FIFO
Flow Sel
RX Line
Enable
Source
(OP1)
Reset
B
Delta
Error
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
INT
RI#
IT
-2
S
1
HADED BITS ARE ENABLED BY
TX Empty
RTS# Pin
RTS/DTR
Hyst Bit-1
RX Over-
Flow Cntl
RX FIFO
Software
Source
Control
Enable
Length
Reset
DSR#
B
Word
Delta
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
INT
run
Int.
IT
-1
DTR# Pin
Hyst Bit-0
RTS/DTR
Flow Cntl
Software
RX Data
RX Data
Enable
Source
Enable
Control
Length
Ready
FIFOs
CTS#
B
Word
Delta
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
INT
Int.
IT
-0
XR17D154
REV. P1.0.0
EFR B
User Data
C
LCR[7]=0
LCR[7]=0
LCR[7]=1
LCR[7]=1
OMMENT
IT
-4.