xr16v2751im Exar Corporation, xr16v2751im Datasheet - Page 52

• Manufacturer Part Number: xr16v2751im
• Description: High Performance Duart With 64-byte Fifo And Powersave Feature
• Manufacturer: Exar Corporation

XR16V2751
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO AND POWERSAVE FEATURE
ABSOLUTE MAXIMUM RATINGS.................................................................................. 40
TYPICAL PACKAGE THERMAL RESISTANCE DATA (MARGIN OF ERROR: ± 15%) 40
ELECTRICAL CHARACTERISTICS ............................................................................... 40
DC E
AC E
P
R
ACKAGE
4.3 INTERRUPT ENABLE REGISTER (IER) - READ/WRITE................................................................................. 24
4.4 INTERRUPT STATUS REGISTER (ISR) - READ-ONLY .................................................................................. 26
4.5 FIFO CONTROL REGISTER (FCR) - WRITE-ONLY......................................................................................... 27
4.6 LINE CONTROL REGISTER (LCR) - READ/WRITE......................................................................................... 29
4.7 MODEM CONTROL REGISTER (MCR) OR GENERAL PURPOSE OUTPUTS CONTROL - READ/WRITE.. 30
4.8 LINE STATUS REGISTER (LSR) - READ ONLY.............................................................................................. 32
4.9 MODEM STATUS REGISTER (MSR) - READ ONLY ....................................................................................... 32
4.10 SCRATCH PAD REGISTER (SPR) - READ/WRITE ....................................................................................... 33
4.11 ENHANCED MODE SELECT REGISTER (EMSR) ......................................................................................... 33
4.12 FIFO LEVEL REGISTER (FLVL) - READ-ONLY............................................................................................. 35
4.13 BAUD RATE GENERATOR REGISTERS (DLL, DLM AND DLD) - READ/WRITE ....................................... 35
4.14 DEVICE IDENTIFICATION REGISTER (DVID) - READ ONLY....................................................................... 35
4.15 DEVICE REVISION REGISTER (DREV) - READ ONLY ................................................................................. 35
4.16 TRIGGER LEVEL REGISTER (TRG) - WRITE-ONLY .................................................................................... 35
4.17 RX/TX FIFO LEVEL COUNT REGISTER (FC) - READ-ONLY ....................................................................... 35
4.18 FEATURE CONTROL REGISTER (FCTR) - READ/WRITE........................................................................... 35
4.19 ENHANCED FEATURE REGISTER (EFR) ..................................................................................................... 36
TA=0o to 70oC (-40o to +85oC for industrial grade package), Vcc is 2.25V to 3.6V ............................................. 40
Unless otherwise noted: TA=0o to 70oC (-40o to +85oC for industrial grade package), Vcc=2.25 - 3.63V, 70 pF load
where applicable....................................................................................................................................................... 41
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
4.3.1 IER VERSUS RECEIVE FIFO INTERRUPT MODE OPERATION ............................................................................... 25
4.3.2 IER VERSUS RECEIVE/TRANSMIT FIFO POLLED MODE OPERATION .................................................................. 25
4.4.1 INTERRUPT GENERATION: ........................................................................................................................................ 26
4.4.2 INTERRUPT CLEARING: ............................................................................................................................................. 26
4.19.1 SOFTWARE FLOW CONTROL REGISTERS (XOFF1, XOFF2, XON1, XON2) - READ/WRITE .............................. 38
10: I
11: T
12: P
13: S
14: A
15: T
16: S
17: UART RESET CONDITIONS FOR CHANNEL A AND B ............................................................................................ 39
13. C
14. M
15. 16 M
16. 16 M
17. 68 M
18. 68 M
19. R
20. T
21. R
22. R
23. T
24. T
D
H
IMENSIONS
ISTORY
NTERRUPT
RANSMIT AND
RIGGER
ARITY SELECTION
CRATCHPAD
UTO
OFTWARE
RANSMIT
RANSMIT
RANSMIT
LOCK
ECEIVE
ECEIVE
ECEIVE
ODEM
C
C
RTS H
ODE
ODE
ODE
ODE
HARACTERISTICS
HARACTERISTICS
...................................................................................................................................... 50
T
T
I
IMING
NPUT
R
R
R
ABLE
(I
(I
(M
(M
S
F
R
R
R
EADY
EADY
EADY
NTEL
NTEL
OURCE AND
LOW
YSTERESIS
EADY
EADY
EADY
(48
OTOROLA
OTOROLA
S
R
/O
WAP
............................................................................................................................................................. 42
S
ECEIVE
) D
) D
UTPUT
& I
& I
& I
ELECT
C
PIN TQFP
& I
& I
& I
........................................................................................................................................................ 30
ONTROL
S
ATA
ATA
NTERRUPT
NTERRUPT
NTERRUPT
ELECTION
NTERRUPT
NTERRUPT
NTERRUPT
) D
) D
FIFO T
T
................................................................................................................................................ 34
................................................................................................................................................ 36
B
B
P
IMING
ATA
ATA
US
US
RIORITY
F
............................................................................................................. 40
............................................................................................................. 41
UNCTIONS
R
W
B
B
- 7
EAD
T
T
T
RIGGER
RITE
US
US
F
.................................................................................................................................... 34
T
T
T
IMING
IMING
IMING
OR
IMING
IMING
IMING
X
L
R
W
T
EVEL
T
C
EAD
7
IMING
RITE
IMING
HANNELS
[N
[FIFO M
[FIFO M
X
T
........................................................................................................................ 37
[N
[FIFO M
[FIFO M
ABLE AND
ON
T
1
..................................................................................................................... 27
T
ON
IMING
................................................................................................................... 43
.................................................................................................................. 44
IMING
-FIFO M
mm
-FIFO M
ODE
ODE
A & B ................................................................................................. 43
.......................................................................................................... 44
)................................................................................... 49
ODE
ODE
......................................................................................................... 45
L
, DMA D
, DMA E
II
EVEL
ODE
, DMA M
, DMA M
ODE
]
S
FOR
]
ELECTION
FOR
NABLED
ISABLED
ODE
ODE
C
C
HANNELS
HANNELS
D
E
]
NABLED
]
ISABLED
FOR
FOR
.......................................................................... 28
C
A & B ......................................................... 45
C
A & B ....................................................... 46
HANNELS
]
HANNELS
]
FOR
FOR
C
C
HANNELS
HANNELS
A & B......................................... 47
A & B........................................ 46
A & B ............................ 48
A & B............................ 47
REV. 1.0.1