XR16L570 Exar Corporation, XR16L570 Datasheet - Page 20

• Manufacturer Part Number: XR16L570
• Description: SMALLEST 1.62V TO 5.5V UART
• Manufacturer: Exar Corporation

XR16L570
SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
.
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
MCR
MSR
RHR
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
R
W
WR
WR
RD
RD
RD
RD
RD
RD
EAD
RITE
/
RX FIFO
RX FIFO
CTS Int.
Enabled
Enable
Trigger
Enable
Global
FIFOs
B
Pres-
BRG
caler
Error
Input
Bit-7
Bit-7
Bit-7
Bit-7
Bit-7
Bit-7
CD#
IT
0/
0/
0
-7
RX FIFO
IR Mode
RTS Int.
Enabled
ENable
Enable
Trigger
Set TX
THR &
Empty
FIFOs
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-
XonAny
Xoff Int.
Enable
Source
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
20
TX FIFO
Internal
Source
Enable
Trigger
Enable
Sleep
Mode
Parity
Loop-
Break
CTS#
B
Even
Input
back
Bit-4
Bit-4
Bit-4
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
Enable
Source
Enable
Enable
Enable
(OP2#)
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
Enable
Source
(OP1#)
Reset
IR RX
Invert
Parity
B
FIFO
Delta
Error
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Stat.
Stop
INT
Bits
RI#
Int.
RX
TX
IT
0
-2
Source
Control
Enable
Length
Output
Empty
Reset
DSR#
RTS#
Over-
Word
B
FIFO
Error
Delta
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
INT
run
TX
RX
RX
Int
IT
0
-1
EFR B
Control
Enable
Source
Enable
Length
Output
Ready
FIFOs
DTR#
CTS#
B
Word
Delta
Bit-0
Bit-0
Data
Bit-0
Bit-0
Data
Bit-0
Bit-0
Bit-0
Bit-0
INT
RX
Int.
RX
xr
IT
1
-0
IT
-4=1
LCR ≠ 0xBF
LCR ≠ 0xBF
LCR ≠ 0xBF
DLM=0x00
DLL=0x00
C
LCR[7]=0
LCR[7]=1
LCR[7]=1
REV. 1.0.0
OMMENT