XR16C2850CM48 EXAR [Exar Corporation], XR16C2850CM48 Datasheet - Page 42

• Manufacturer Part Number: XR16C2850CM48
• Description: 3.3V AND 5V DUART WITH 128-BYTE FIFO
• Manufacturer: EXAR [Exar Corporation]

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GENERAL DESCRIPTION................................................................................................. 1
PIN DESCRIPTIONS .......................................................................................................... 3
1.0 Product DESCRIPTION ........................................................................................................... 6
2.0 FUNCTIONAL DESCRIPTIONS ............................................................................................... 7
3.0 UART INTERNAL REGISTERS ............................................................................................. 18
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F
F
F
T
T
T
T
F
F
F
T
F
F
F
F
F
T
F
F
T
IGURE
IGURE
IGURE
ABLE
ABLE
ABLE
ABLE
IGURE
IGURE
IGURE
ABLE
IGURE
IGURE
IGURE
IGURE
IGURE
ABLE
IGURE
IGURE
ABLE
A
F
ORDERING INFORMATION
DATA BUS INTERFACE........................................................................................................................... 3
MODEM OR SERIAL I/O INTERFACE ..................................................................................................... 3
ANCILLARY SIGNALS.............................................................................................................................. 4
2.1 CPU I
2.2 D
2.3 D
2.4 C
2.5 C
2.6 DMA M
2.7 INTA
2.8 C
2.9 P
2.10 T
2.11 R
2.12 A
2.13 A
2.14 A
2.15 A
2.16 S
2.17 A
2.18 I
2.19 S
2.20 I
EATURES
PPLICATIONS
1: C
2: TXRDY#
3: INTA
4: INTA
5: T
6: A
7: UART CHANNEL A AND B UART INTERNAL REGISTERS ............................................................................................. 18
2.10.1 Transmit Holding Register (THR) - Write Only ....................................................................................... 11
2.10.2 Transmitter Operation in non-FIFO Mode .............................................................................................. 11
2.10.3 Transmitter Operation in FIFO Mode ..................................................................................................... 11
2.11.1 Receive Holding Register (RHR) - Read-Only ....................................................................................... 12
1. XR16C2850 B
2. P
3. XR16C2850 D
4. T
5. E
6. B
7. T
8. T
9. R
10. R
11. A
12. I
13. I
ROGRAMMABLE
EVICE
EVICE
HANNEL
HANNEL
RYSTAL
NFRARED
NTERNAL
RANSMITTER
UTO
UTO
ECEIVER
YPICAL DATA RATES WITH A
HANNEL
UTO
UTO
UTO
PECIAL
UTO
LEEP
YPICAL OSCILLATOR CONNECTIONS
RANSMITTER
RANSMITTER
IN
XTERNAL
AUD
ECEIVER
NFRARED
NTERNAL
UTO
ECEIVER
AND
O
NTERFACE
AND
AND
.................................................................................................................................................. 1
X
RTS (H
X
UT
ODE
R
R
I
RTS H
CTS F
ON
RS485 H
DENTIFICATION AND
RTS
ON
M
ATE
ESET
O
AND
A
A
A
............................................................................................................................................. 1
A
INTB P
INTB P
/X
INTB O
C
ODE WITH
SSIGNMENT
SCILLATOR OR
O
C
AND
M
/X
L
L
AND
AND
....................................................................................................................................... 12
OFF
T
O
HARACTER
G
........................................................................................................................................ 8
PERATION IN NON
LOCK
OOP
AND
OOPBACK
RANSMIT
RXRDY# O
ODE
PERATION IN
ENERATOR AND
OFF
O
O
LOCK
LOW
ARDWARE
YSTERESIS
.................................................................................................................................... 7
B S
(S
PERATION IN NON
PERATION IN
ATA
................................................................................................................................. 11
INS
IN
B S
B I
CTS F
B
B
................................................................................................................................. 7
C
OFTWARE
ALF
ACK IN
UPUTS
ELECT
O
(S
AUD
............................................................................................................................. 15
ONNECTION FOR
D
B
O
NTERNAL
C
PERATION
............................................................................................................................................................. 2
ELECTION
............................................................................................................................. 2
D
US
OFTWARE
IAGRAM
PERATION FOR
-
A
ONTROL
DUPLEX
ATA
LOW
UTO
UTPUTS IN
R
I
....................................................................................................................................................... 7
D
C
NTERCONNECTIONS
..................................................................................................................... 16
FIFO
ATE
14.7456 MH
) F
) F
ETECT
HANNEL
E
.................................................................................................................... 8
E
FIFO
C
-FIFO M
................................................................................................................. 13
P
NCODING AND
................................................................................................................................................ 1
W
LOW
XT
ONTROL
LOW
RESCALER
F
R
AND
R
G
OR
-FIFO M
AKE
EVISION
. C
C
) F
........................................................................................................... 13
EGISTERS
AND
............................................................................................................ 7
ENERATOR
TABLE OF CONTENTS
........................................................................................................................................ 9
C
FIFO
ONTROL
A
R
E
........................................................................................................ 15
A
C
ONTROL
T
LOCK
LOW
-U
ECEIVER
XTENDED
ODE
AND
UTO
RANSMITTER
O
F
ONTROL
Z CRYSTAL OR EXTERNAL CLOCK
LOW
P
PERATION
ODE
AND
............................................................................................................................ 10
........................................................................................................................... 12
B........................................................................................................................ 17
RTS F
C
R
............................................................................................... 16
I
................................................................................................ 7
......................................................................................................................... 7
....................................................................................................................... 15
NPUT
ECEIVE
C
...................................................................................................................... 11
ONTROL
....................................................................................................................... 9
DMA M
........................................................................................... 15
ONTROL
D
............................................................................................ 8
........................................................................................... 9
ATA
LOW
....................................................................................... 13
................................................................................................................ 8
.............................................................................................................. 14
...................................................................................... 9
D
R
ODE
ATA
C
ATE
M
ONTROL
I
............................................................................... 14
ODE
.................................................................................................... 8
D
................................................................................................... 9
ECODING
............................................................................................. 11
M
ODE
3.3V AND 5V DUART WITH 128-BYTE FIFO
................................................................................. 16
............................................................................... 13
.............................................................................. 10
XR16C2850
REV. 2.0.0