XR16L580 Exar Corporation, XR16L580 Datasheet - Page 21

• Manufacturer Part Number: XR16L580
• Description: Smallest 2.25 to 5.5V Uart With 16-Byte Fifo And Power-save
• Manufacturer: Exar Corporation

áç
áç
REV. 1.2.0
.
áç
áç
A
A2-A0
DDRESS
0 0 0
0 0 0
0 0 1
0 1 0
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 0 0
0 0 1
T
ABLE
DREV
N
DVID
RHR
MCR
MSR
THR
FCR
SPR
DLM
LCR
LSR
R
DLL
IER
ISR
AME
EG
6: INTERNAL REGISTERS DESCRIPTION.
RD/WR
RD/WR Divisor
RD/WR
RD/WR
RD/WR
RD/WR
W
R
WR
WR
RD
RD
RD
RD
RD
RD
EAD
RITE
/
RX FIFO
RX FIFO
CTS Int.
Enabled
Enable
Enable
Trigger
Global
FIFOs
Pres-
B
BRG
caler
Error
Input
Bit-7
Bit-7
CD#
Bit-7
Bit-7
Bit-7
Bit-7
IT
0/
0/
0
-7
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
RX FIFO
IR Mode
RTS Int.
Enabled
ENable
Enable
Trigger
Set TX
THR &
FIFOs
Empty
Break
B
Input
Bit-6
Bit-6
TSR
Bit-6
Bit-6
Bit-6
Bit-6
RI#
IT
0/
0/
0
-6
16C550 Compatible Registers
Baud Rate Generator Divisor
TX FIFO
Set Par-
Xoff Int.
XonAny
Source
Enable
Trigger
Empty
DSR#
B
Input
Bit-5
Bit-5
Bit-5
THR
Bit-5
Bit-5
Bit-5
Bit-5
INT
ity
IT
0/
0/
0/
0/
0
-5
21
TX FIFO
Internal
Source
Enable
Trigger
Enable
Break
Sleep
Mode
Parity
Loop-
CTS#
B
Even
Input
Bit-4
Bit-4
Bit-4
back
Bit-4
Bit-4
Bit-4
Bit-4
INT
RX
IT
0/
0/
0/
0
-4
S
HADED BITS ARE ENABLED WHEN
RX Fram-
INT Out-
ing Error
Stat. Int.
Modem
(OP2#)
Enable
Source
Enable
Enable
Enable
Mode
Parity
B
Delta
DMA
Bit-3
Bit-3
Bit-3
Bit-3
Bit-3
Bit-3
Bit-3
CD#
INT
put
IT
0
-3
RX Line
(OP1#)
Enable
Source
IR RX
Reset
Parity
Invert
B
FIFO
Delta
Error
Bit-2
Bit-2
Stat.
Bit-2
Stop
Bit-2
Bit-2
Bit-2
Bit-2
INT
Bits
RI#
Int.
RX
TX
IT
0
-2
Source
Control
Enable
Length
Output
Empty
Reset
DSR#
RTS#
Over-
B
Word
Delta
FIFO
Error
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
INT
RX
RX
run
TX
Int
IT
0
-1
EFR B
Control
Enable
Source
Enable
Length
Output
Ready
FIFOs
DTR#
CTS#
B
Word
Delta
Data
Data
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
INT
RX
Int.
RX
IT
1
-0
IT
-4=1
XR16L580
LCR
LCR
LCR
DLM=0x00
DLL=0x00
C
LCR[7]=0
LCR[7]=1
LCR[7]=1
OMMENT
0xBF
0xBF
0xBF