xr16c2850im Exar Corporation, xr16c2850im Datasheet - Page 51

• Manufacturer Part Number: xr16c2850im
• Description: Dual Uart With Tx And Rx Fifo Counters, 128 Bytes Of Fifos And Automatic Rs-485 Half Duplex Control
• Manufacturer: Exar Corporation

xr
REV. 2.1.3
ABSOLUTE MAXIMUM RATINGS .................................................................................. 38
TYPICAL PACKAGE THERMAL RESISTANCE DATA (MARGIN OF ERROR: ± 15%) 38
ELECTRICAL CHARACTERISTICS................................................................................ 38
PACKAGE DIMENSIONS (48 PIN TQFP - 7 X 7 X 1
PACKAGE DIMENSIONS (44 PIN PLCC) ....................................................................... 47
PACKAGE DIMENSIONS (40 PIN PDIP) ........................................................................ 48
T
ABLE OF
DC E
AC E
TA=0
APPLICABLE
R
4.4 INTERRUPT STATUS REGISTER (ISR) - READ-ONLY ............................................................................... 25
4.5 FIFO CONTROL REGISTER (FCR) - WRITE-ONLY ..................................................................................... 26
4.6 LINE CONTROL REGISTER (LCR) - READ/WRITE ..................................................................................... 28
4.7 MODEM CONTROL REGISTER (MCR) OR GENERAL PURPOSE OUTPUTS CONTROL - READ/WRITE 29
4.8 LINE STATUS REGISTER (LSR) - READ ONLY ........................................................................................... 30
4.9 MODEM STATUS REGISTER (MSR) - READ ONLY .................................................................................... 31
4.10 SCRATCH PAD REGISTER (SPR) - READ/WRITE .................................................................................... 32
4.11 ENHANCED MODE SELECT REGISTER (EMSR) ...................................................................................... 32
4.12 FIFO LEVEL REGISTER (FLVL) - READ-ONLY ......................................................................................... 33
4.13 BAUD RATE GENERATOR REGISTERS (DLL AND DLM) - READ/WRITE .............................................. 33
4.14 DEVICE IDENTIFICATION REGISTER (DVID) - READ ONLY .................................................................... 33
4.15 DEVICE REVISION REGISTER (DREV) - READ ONLY .............................................................................. 33
4.16 TRIGGER LEVEL / FIFO DATA COUNT REGISTER (TRG) - WRITE-ONLY ............................................. 34
4.17 FIFO DATA COUNT REGISTER (FC) - READ-ONLY ................................................................................. 34
4.18
4.19 ENHANCED FEATURE REGISTER (EFR) .................................................................................................. 35
4.20 SOFTWARE FLOW CONTROL REGISTERS (XOFF1, XOFF2, XON1, XON2) - READ/WRITE ................ 36
EVISION
T
T
T
T
T
T
T
T
F
F
F
F
F
F
F
F
F
F
F
F
ABLE
ABLE
ABLE
ABLE
ABLE
ABLE
ABLE
ABLE
IGURE
IGURE
IGURE
IGURE
IGURE
IGURE
IGURE
IGURE
IGURE
IGURE
IGURE
IGURE
LECTRICAL
LECTRICAL
O TO
4.4.1 INTERRUPT GENERATION: ...................................................................................................................................... 25
4.4.2 INTERRUPT CLEARING: ........................................................................................................................................... 25
FEATURE CONTROL REGISTER (FCTR) - READ/WRITE ....................................................................... 34
9: I
10: T
11: P
12: S
13: E
14: T
15: S
16: UART RESET CONDITIONS FOR CHANNEL A AND B............................................................................................ 37
14. XR16C2850 VOL S
15. XR16C2850 VOH S
16. C
17. M
19. D
18. D
20. R
21. T
22. R
23. R
24. T
25. T
H
C
70
ISTORY
................................................................................................................................................. 40
NTERRUPT
ONTENTS
O
RANSMIT AND
ARITY SELECTION
CRATCHPAD
XTENDED
RIGGER
OFTWARE
RANSMIT
RANSMIT
RANSMIT
LOCK
ATA
ATA
ECEIVE
ECEIVE
ECEIVE
C (-40
ODEM
C
C
HARACTERISTICS
HARACTERISTICS
B
B
...................................................................................................................................... 49
T
US
US
I
T
IMING
NPUT
S
R
R
R
ABLE
O TO
RTS H
F
R
R
R
OURCE AND
W
R
EADY
EADY
EADY
LOW
EADY
EADY
EADY
EAD
............................................................................................................
S
RITE
R
/O
WAP
............................................................................................................................................................. 41
S
ECEIVE
+85
UTPUT
ELECT
& I
& I
& I
C
YSTERESIS
T
........................................................................................................................................................ 29
T
& I
& I
& I
ONTROL
IMING
S
IMING
NTERRUPT
NTERRUPT
NTERRUPT
INK
ELECTION
OURCE
NTERRUPT
NTERRUPT
NTERRUPT
O
P
C
FIFO T
............................................................................................................................................... 34
T
RIORITY
C
.............................................................................................................................................. 42
IMING
............................................................................................................................................ 42
URRENT
FOR INDUSTRIAL GRADE PACKAGE
.............................................................................................................. 38
.............................................................................................................. 40
F
........................................................................................................................................ 33
C
UNCTIONS
URRENT
T
T
T
RIGGER
.................................................................................................................................... 32
F
T
T
T
IMING
IMING
IMING
OR
L
IMING
IMING
IMING
EVEL
C
C
HART
HANNELS
[N
[FIFO M
[FIFO M
........................................................................................................................ 35
C
T
....................................................................................................................... 25
[N
[FIFO M
[FIFO M
HART
ABLE AND
ON
ON
................................................................................................................... 39
-FIFO M
-FIFO M
............................................................................................................. 39
ODE
ODE
A & B ................................................................................................. 41
ODE
ODE
L
II
, DMA D
, DMA E
EVEL
2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS
ODE
, DMA M
, DMA M
ODE
]
S
FOR
]
ELECTION
FOR
NABLED
ISABLED
ODE
ODE
C
mm
C
HANNELS
HANNELS
D
E
), V
]
)................................................ 46
]
ISABLED
NABLED
FOR
.......................................................................... 27
FOR
CC IS
C
A & B ......................................................... 43
C
A & B ....................................................... 43
HANNELS
]
HANNELS
]
FOR
FOR
2.90V
C
C
HANNELS
HANNELS
A & B......................................... 44
A & B........................................ 44
TO
5.5V, 70
A & B ............................ 45
A & B ........................... 45
P
F L
XR16C2850
OAD WHERE
I