- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376454 > XR16L2752IJ (EXAR CORP) 2.25V TO 5.5V DUART WITH 64-BYTE FIFO PDF資料下載
參數(shù)資料
| 型號： | XR16L2752IJ |
| 廠商： | EXAR CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2.25V TO 5.5V DUART WITH 64-BYTE FIFO |
| 中文描述： | 2 CHANNEL(S), 6.25M bps, SERIAL COMM CONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 7/49頁 |
| 文件大小： | 619K |
| 代理商： | XR16L2752IJ |
第1頁第2頁第3頁第4頁第5頁第6頁當(dāng)前第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁
xr
REV. 1.2.0
XR16L2752
2.25V TO 5.5V DUART WITH 64-BYTE FIFO
7
2.0
FUNCTIONAL DESCRIPTIONS
2.1
The CPU interface is 8 data bits wide with 3 address lines and control signals to execute data bus read and
write transactions. The 2752 data interface supports the Intel compatible types of CPUs and it is compatible to
the industry standard 16C550 UART. No clock (oscillator nor external clock) is required to operate a data bus
transaction. Each bus cycle is asynchronous using CS#, IOR# and IOW# signals. Both UART channels share
the same data bus for host operations. The data bus interconnections are shown in
Figure 3
CPU Interface
2.2
The 2752 can accept up to 5V inputs even when operating at 3.3V or 2.5V. But note that if the 2752 is
operating at 2.5V, its V
OH
may not be high enough to meet the requirements of the V
IH
of a CPU or a serial
transceiver that is operating at 5V. Caution: XTAL1 is not 5 volt tolerant.
2.3
Device Reset
The RESET input resets the internal registers and the serial interface outputs in both channels to their default
state (see
Table 16 on page 38
). An active high pulse of longer than 40 ns duration will be required to activate
the reset function in the device.
2.4
Device Identification and Revision
The XR16L2752 provides a Device Identification code and a Device Revision code to distinguish the part from
other devices and revisions. To read the identification code from the part, it is required to set the baud rate
generator registers DLL and DLM both to 0x00. Now reading the content of the DLM will provide 0x0A for the
XR16L2752 and reading the content of DLL will provide the revision of the part; for example, a reading of 0x01
means revision A.
2.5
Channel A and B Selection
The UART provides the user with the capability to bi-directionally transfer information between an external
CPU and an external serial communication device. A logic 0 on chip select pin (CS#) allows the user to select
the UART and then using the channel select (CHSEL) pin, the user can select channel A or B to configure,
send transmit data and/or unload receive data to/from the UART. Individual channel select functions are shown
in
Table 1
.
5-Volt Tolerant Inputs
F
IGURE
3. XR16L2750 D
ATA
B
US
I
NTERCONNECTIONS
VCC
VCC
(O P2A#)
DSRA#
CDA#
CTSA#
RTSA#
DTRA#
RXA
TXA
RIA#
(O P2B#)
DSRB#
CDB#
CTSB#
RTSB#
DTRB#
RXB
TXB
RIB#
GND
A0
A1
A2
UART_CS#
UART_CHSEL
IOR#
IOW #
D0
A0
A1
A2
CS#
CHSEL
D0
IOR#
IOW #
UART
Channel A
UART
Channel B
UART_INTB
UART_INTA
INTB
INTA
(RXRDYA#)
TXRDYB#
TXRDYA#
(RXRDYA#)
TXRDYB#
TXRDYA#
(RXRDYB#)
(RXRDYB#)
UART_RESET
RESET
Serial Interface of
RS-232, RS-485
Serial Interface of
RS-232, RS-485
2750int
(BAUDOUTB#)
(BAUDOUTA#)
Pins in parentheses become available through the MF# pin. MF# A/B becomes RXRDY# A/B when AFR[2:1] = '10'. MF# A/B becomes OP2# A/B
when AFR[2:1] = '00'. MF# A/B becomes BAUDOUT# A/B when AFR[1:0] = '01'.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XR16L580 | SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE |
| XR16L580IL | SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE |
| XR16L580IM | SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE |
| XR16L651 | 2.5V, 3.3V and 5V Low Power UART with 32-Byte FIFO(2.5V, 3.3V和5V 低功耗通用異步接收器/發(fā)送器（帶32字節(jié)先進(jìn)先出）) |
| XR16L784 | HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR16L2752IJ-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 |
| XR16L2752IJTR-F | 制造商:Exar Corporation 功能描述:XR16L2752 Series 6.25 Mbps 5.5 V Dual UART With 64-Byte FIFO - PLCC-44 |
| XR16L570 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE |
| XR16L570_07 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE |
| XR16L570IL24 | 功能描述:UART 接口集成電路 UART w/ POWER SAVE 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。