xr16l2750im Exar Corporation, xr16l2750im Datasheet - Page 48

• Manufacturer Part Number: xr16l2750im
• Description: High-performance 2.25v - 5.5v Duart
• Manufacturer: Exar Corporation

XR16L2750
2.25V TO 5.5V DUART WITH 64-BYTE FIFO
ABSOLUTE MAXIMUM RATINGS...................................................................................37
TYPICAL PACKAGE THERMAL RESISTANCE DATA (MARGIN OF ERROR: ± 15%) 37
ELECTRICAL CHARACTERISTICS ................................................................................37
DC E
AC E
P
P
R
4.4 INTERRUPT STATUS REGISTER (ISR) - READ-ONLY ............................................................................... 24
4.5 FIFO CONTROL REGISTER (FCR) - WRITE-ONLY ...................................................................................... 25
4.6 LINE CONTROL REGISTER (LCR) - READ/WRITE ...................................................................................... 27
4.7 MODEM CONTROL REGISTER (MCR) OR GENERAL PURPOSE OUTPUTS CONTROL - READ/WRITE 28
4.8 LINE STATUS REGISTER (LSR) - READ ONLY ........................................................................................... 29
4.9 MODEM STATUS REGISTER (MSR) - READ ONLY .................................................................................... 30
4.10 SCRATCH PAD REGISTER (SPR) - READ/WRITE .................................................................................... 31
4.11 ENHANCED MODE SELECT REGISTER (EMSR) ...................................................................................... 31
4.12 FIFO LEVEL REGISTER (FLVL) - READ-ONLY .......................................................................................... 32
4.13 BAUD RATE GENERATOR REGISTERS (DLL AND DLM) - READ/WRITE .............................................. 32
4.14 DEVICE IDENTIFICATION REGISTER (DVID) - READ ONLY .................................................................... 32
4.15 DEVICE REVISION REGISTER (DREV) - READ ONLY .............................................................................. 33
4.16 TRIGGER LEVEL REGISTER (TRG) - WRITE-ONLY ................................................................................. 33
4.17 RX/TX FIFO LEVEL COUNT REGISTER (FC) - READ-ONLY .................................................................... 33
4.18
4.19 ENHANCED FEATURE REGISTER (EFR) .................................................................................................. 34
TA=0o to 70oC (-40o to +85oC for industrial grade package), Vcc is 2.25V to 5.5V .............................................. 37
Unless otherwise noted: TA=0o to 70oC (-40o to +85oC for industrial grade package), Vcc=2.25 - 5.5V, 70 pF load
where applicable........................................................................................................................................................ 38
ACKAGE
ACKAGE
EVISION
T
T
T
T
T
T
T
T
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
LECTRICAL
LECTRICAL
4.3.2 IER VERSUS RECEIVE/TRANSMIT FIFO POLLED MODE OPERATION ................................................................ 23
4.4.1 INTERRUPT GENERATION: ...................................................................................................................................... 24
4.4.2 INTERRUPT CLEARING: ........................................................................................................................................... 24
4.19.1 SOFTWARE FLOW CONTROL REGISTERS (XOFF1, XOFF2, XON1, XON2) - READ/WRITE ............................ 35
FEATURE CONTROL REGISTER (FCTR) - READ/WRITE ........................................................................ 33
9: I
10: T
11: P
12: S
13: A
14: T
15: S
16: UART RESET CONDITIONS FOR CHANNEL A AND B............................................................................................ 36
14. C
15. M
17. D
16. D
18. R
19. T
20. R
21. R
22. T
23. T
D
D
H
ISTORY
IMENSIONS
IMENSIONS
NTERRUPT
RANSMIT AND
RIGGER
ARITY SELECTION
CRATCHPAD
UTO
OFTWARE
RANSMIT
RANSMIT
RANSMIT
LOCK
ATA
ATA
ECEIVE
ECEIVE
ECEIVE
ODEM
C
C
RTS H
HARACTERISTICS
HARACTERISTICS
B
B
.......................................................................................................................................46
T
US
US
T
I
IMING
NPUT
S
R
R
R
ABLE
F
R
R
R
OURCE AND
W
R
EADY
EADY
EADY
LOW
(48
(44
YSTERESIS
EADY
EADY
EADY
EAD
S
RITE
R
/O
WAP
............................................................................................................................................................. 39
S
ECEIVE
UTPUT
& I
& I
& I
ELECT
C
PIN TQFP
PIN
T
........................................................................................................................................................ 28
T
& I
& I
& I
ONTROL
IMING
S
IMING
NTERRUPT
NTERRUPT
NTERRUPT
ELECTION
NTERRUPT
NTERRUPT
NTERRUPT
PLCC) .........................................................................................................45
P
................................................................................................................................................ 32
................................................................................................................................................ 33
FIFO T
T
.............................................................................................................................................. 40
RIORITY
IMING
............................................................................................................................................. 40
F
..............................................................................................................37
..............................................................................................................38
UNCTIONS
- 7
T
T
T
RIGGER
.................................................................................................................................... 31
F
IMING
T
IMING
IMING
T
T
OR
L
X
IMING
IMING
IMING
EVEL
7
C
HANNELS
X
[N
[FIFO M
[FIFO M
........................................................................................................................ 34
T
....................................................................................................................... 25
[N
[FIFO M
[FIFO M
ABLE AND
1
ON
ON
MM
-FIFO M
-FIFO M
ODE
ODE
) ....................................................................................44
A & B ................................................................................................. 39
ODE
ODE
L
II
, DMA D
, DMA E
EVEL
ODE
, DMA M
, DMA M
ODE
]
S
FOR
]
FOR
ELECTION
NABLED
ISABLED
ODE
ODE
C
C
HANNELS
HANNELS
D
E
]
NABLED
]
ISABLED
FOR
.......................................................................... 26
FOR
C
A & B ......................................................... 41
C
A & B ....................................................... 41
HANNELS
]
HANNELS
]
FOR
FOR
C
C
HANNELS
HANNELS
A & B......................................... 42
A & B........................................ 42
A & B ............................ 43
A & B............................ 43
xr
REV. 1.2.1