XR16C854CV EXAR [Exar Corporation], XR16C854CV Datasheet - Page 25

• Manufacturer Part Number: XR16C854CV
• Description: 2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
• Manufacturer: EXAR [Exar Corporation]

xr
REV. 3.0.1
A
A2-A0
X X X
DDRESS
0 0 0
0 0 0
0 0 1
0 0 0
0 0 1
0 0 0
0 0 1
0 1 0
1 0 0
1 0 1
1 1 0
1 1 1
T
ABLE
XOFF1 RD/WR
XOFF2 RD/WR
FSTAT
DREV
XON1 RD/WR
XON2 RD/WR
FCTR RD/WR
N
DVID
DLM
TRG
R
EFR
DLL
FC
AME
EG
9: INTERNAL REGISTERS DESCRIPTION.
RD/WR
RD/WR
RD/WR
W
R
WR
RD
RD
RD
RD
EAD
RITE
/
RDYD#
Enable
RX/TX
Mode
CTS#
B
Bit-7
Bit-7
Bit-7
Bit-7
Bit-7
Auto
Bit-7
Bit-7
Bit-7
Bit-7
RX-
IT
0
-7
SCPAD
RDYC#
Enable
Swap
RTS#
B
Bit-6
Bit-6
Bit-6
Bit-6
Bit-6
Auto
Bit-6
Bit-6
Bit-6
Bit-6
RX-
IT
0
-6
Baud Rate Generator Divisor
Enhanced Registers
RDYB#
Special
Select
Table
B
Char
Bit-5
Bit-5
Bit-5
Bit-5
Bit-5
Bit-1
Bit-5
Bit-5
Bit-5
Bit-5
Trig
RX-
IT
0
-5
25
FCR[5:4],
IER [7:4],
ISR [5:4],
MCR[7:5]
RDYA#
Enable
B
Table
Bit-4
Bit-4
Bit-4
Bit-4
Bit-4
Bit-0
Bit-4
Bit-4
Bit-4
Bit-4
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
Trig
RX-
IT
1
-4
S
HADED BITS ARE ENABLED WHEN
Direction
RDYD#
Control
RS485
B
ware
Bit-3
Bit-3
Bit-3
Bit-3
Bit-3
Auto
Soft-
Flow
Bit-3
Bit-3
Bit-3
Bit-3
Bit-3
Cntl
TX-
IT
0
-3
RDYC#
RX IR
B
Input
ware
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Soft-
Flow
Bit-2
Bit-2
Bit-2
Bit-2
Bit-2
Cntl
TX-
Inv.
IT
1
-2
RDYB#
B
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
Auto
Bit-1
Soft-
ware
Flow
Bit-1
Bit-1
Bit-1
Bit-1
Bit-1
RTS
Hyst
Cntl
TX-
IT
0
-1
RDYA#
EFR B
B
ware
Flow
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Auto
RTS
Hyst
Bit-0
Soft-
Bit-0
Bit-0
Bit-0
Bit-0
Bit-0
Cntl
XR16C854/854D
TX-
IT
0
-0
IT
-4=1
LCR ≠ 0xBF
LCR ≠ 0xBF
FSRS# pin is
a logic 0. No
address lines
DLM=0x00
LCR=0
LCR[7] = 1
LCR[7] = 1
DLL=0x00
C
required.
OMMENT
X
BF