參數(shù)資料
型號： XR16L2450
廠商： Exar Corporation
英文描述： 2.25V TO 5.5V DUART
中文描述： 2.25V至5.5V的杜阿爾特
文件頁數(shù)： 29/30頁
文件大?。?/td> 511K
代理商： XR16L2450
xr
2.25V TO 5.5V DUART
XR16L2450
REV. 1.1.0
I
TABLE OF CONTENTS
GENERAL DESCRIPTION.................................................................................................1
A
PPLICATIONS
...............................................................................................................................................1
F
EATURES
.....................................................................................................................................................1
F
IGURE
1. XR16L2450 B
LOCK
D
IAGRAM
......................................................................................................................................... 1
F
IGURE
2. P
IN
O
UT
A
SSIGNMENT
..................................................................................................................................................... 2
ORDERING
INFORMATION
................................................................................................................................2
PACKAGE PIN DESCRIPTIONS ......................................................................................3
P
IN
D
ESCRIPTIONS
........................................................................................................................................3
1.0 PRODUCT DESCRIPTION ....................................................................................................................6
2.0 FUNCTIONAL DESCRIPTIONS ............................................................................................................6
2.1 CPU INTERFACE ............................................................................................................................................. 6
F
IGURE
3. XR16L2450 D
ATA
B
US
I
NTERCONNECTIONS
.................................................................................................................. 6
2.2 5-VOLT TOLERANT INPUTS ........................................................................................................................... 6
2.3 DEVICE RESET ................................................................................................................................................ 6
2.4 DEVICE IDENTIFICATION AND REVISION .................................................................................................... 7
2.5 CHANNEL A AND B SELECTION ................................................................................................................... 7
T
ABLE
1: C
HANNEL
A
AND
B S
ELECT
............................................................................................................................................... 7
2.6 CHANNEL A AND B INTERNAL REGISTERS ................................................................................................ 7
2.7 INTA AND INTB OUTPUTS .............................................................................................................................. 7
T
ABLE
2: INTA
AND
INTB P
INS
O
PERATION
FOR
T
RANSMITTER
........................................................................................................ 7
2.8 CRYSTAL OSCILLATOR OR EXTERNAL CLOCK INPUT ............................................................................. 7
F
IGURE
4. T
YPICAL
OSCILLATOR
CONNECTIONS
................................................................................................................................. 8
2.9 PROGRAMMABLE BAUD RATE GENERATOR ............................................................................................. 8
T
ABLE
3: T
YPICAL
DATA
RATES
WITH
A
14.7456 MH
Z
CRYSTAL
OR
EXTERNAL
CLOCK
........................................................................ 9
2.10 TRANSMITTER ............................................................................................................................................... 9
2.10.1 TRANSMIT HOLDING REGISTER (THR) - WRITE ONLY......................................................................................... 9
F
IGURE
5. T
RANSMITTER
O
PERATION
............................................................................................................................................... 9
2.11 RECEIVER .................................................................................................................................................... 10
2.11.1 RECEIVE HOLDING REGISTER (RHR) - READ-ONLY .......................................................................................... 10
F
IGURE
6. R
ECEIVER
O
PERATION
................................................................................................................................................... 10
2.12 INTERNAL LOOPBACK ............................................................................................................................... 11
F
IGURE
7. I
NTERNAL
L
OOP
B
ACK
IN
C
HANNELS
A
AND
B ................................................................................................................ 11
3.0 UART INTERNAL REGISTERS ...........................................................................................................12
T
ABLE
4: UART CHANNEL A AND B UART INTERNAL REGISTERS ..................................................................................... 12
T
ABLE
5: INTERNAL REGISTERS DESCRIPTION................................................................................................................... 13
4.0 INTERNAL REGISTER DESCRIPTIONS ............................................................................................13
4.1 RECEIVE HOLDING REGISTER (RHR) - READ- ONLY ............................................................................... 13
4.2 TRANSMIT HOLDING REGISTER (THR) - WRITE-ONLY ............................................................................ 13
4.3 INTERRUPT ENABLE REGISTER (IER) - READ/WRITE ............................................................................. 13
4.3.1 INTERRUPT MODE OPERATION.............................................................................................................................. 14
4.3.2 POLLED MODE OPERATION.................................................................................................................................... 14
4.4 INTERRUPT STATUS REGISTER (ISR) - READ-ONLY ............................................................................... 14
4.4.1 INTERRUPT GENERATION:...................................................................................................................................... 15
4.4.2 INTERRUPT CLEARING: ........................................................................................................................................... 15
T
ABLE
6: I
NTERRUPT
S
OURCE
AND
P
RIORITY
L
EVEL
....................................................................................................................... 15
4.5 LINE CONTROL REGISTER (LCR) - READ/WRITE ..................................................................................... 15
T
ABLE
7: P
ARITY
SELECTION
.......................................................................................................................................................... 16
4.6 MODEM CONTROL REGISTER (MCR) OR GENERAL PURPOSE OUTPUTS CONTROL - READ/WRITE 17
4.7 LINE STATUS REGISTER (LSR) - READ ONLY ........................................................................................... 17
4.8 MODEM STATUS REGISTER (MSR) - READ ONLY .................................................................................... 18
4.9 SCRATCH PAD REGISTER (SPR) - READ/WRITE ...................................................................................... 19
4.10 BAUD RATE GENERATOR REGISTERS (DLL AND DLM) - READ/WRITE .............................................. 19
4.11 DEVICE IDENTIFICATION REGISTER (DVID) - READ ONLY .................................................................... 19
4.12 DEVICE REVISION REGISTER (DREV) - READ ONLY .............................................................................. 19
T
ABLE
8: UART RESET CONDITIONS FOR CHANNEL A AND B.............................................................................................. 20
ABSOLUTE MAXIMUM RATINGS ..................................................................................21
TYPICAL PACKAGE THERMAL RESISTANCE DATA (MARGIN OF ERROR: ± 15%)21
ELECTRICAL CHARACTERISTICS................................................................................21
相關(guān)PDF資料
PDF描述
XR16L2450IJ 97-3108A20-29S-KIT
XR16L2450IM 2.25V TO 5.5V DUART
XR16L2550IJ LOW VOLTAGE DUART WITH 16-BYTE FIFO
XR16L2550IL LOW VOLTAGE DUART WITH 16-BYTE FIFO
XR16L2550IM LOW VOLTAGE DUART WITH 16-BYTE FIFO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16L2450_05 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART
XR16L2450IJ 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART
XR16L2450IJ-0A-EB 功能描述:UART 接口集成電路 Supports L2450 44 ld PLCC, ISA Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16L2450IJ-F 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16L2450IM 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART
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