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XR16M2750 PDF预览

XR16M2750

更新时间: 2024-11-07 04:23:31
品牌 Logo 应用领域
艾科嘉 - EXAR 先进先出芯片
页数 文件大小 规格书
53页 1079K
描述
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO

XR16M2750 数据手册

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PRELIMINARY  
XR16M2750  
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO  
JUNE 2007  
REV. P1.0.0  
FEATURES  
GENERAL DESCRIPTION  
1.62 to 3.6 Volt Operation  
1
The XR16M2750 (M2750) is a high performance  
dual universal asynchronous receiver and transmitter  
(UART) with 64 byte TX and RX FIFOs. The device  
operates from 1.62 to 3.6 volts and is pin-to-pin  
compatible to Exar’s ST16C2550 and XR16V2750.  
The M2750 register set is identical to the XR16V2750  
and is compatible to the ST16C2550 and the  
XR16C2850 enhanced features. It supports the  
Exar’s enhanced features of programmable FIFO  
trigger level and FIFO level counters, automatic  
hardware (RTS/CTS) and software flow control,  
automatic RS-485 half duplex direction control output  
and a complete modem interface. Onboard registers  
provide the user with operational status and data  
error flags. An internal loopback capability allows  
system diagnostics. Independent programmable  
baud rate generators are provided in each channel to  
select data rates up to 8 Mbps at 3.3 Volt and 8X  
sampling clock. The M2750 is available in 48-pin  
TQFP and 32-pin QFN packages.  
Pin-to-pin compatible to Exar’s XR16V2750 and  
TI’s TL16C752B in the 48-TQFP package  
Two independent UART channels  
Register set compatible to XR16V2750  
Data rate of up to 8 Mbps at 3.3 V, 6.25 Mbps  
at 2.5 V and 4 Mbps at 1.8 V with 8X sampling  
rate  
Fractional Baud Rate Generator  
Transmit and Receive FIFOs of 64 bytes  
Programmable TX and RX FIFO Trigger Levels  
Transmit and Receive FIFO Level Counters  
Automatic Hardware (RTS/CTS) Flow Control  
Selectable Auto RTS Flow Control Hysteresis  
Automatic Software (Xon/Xoff) Flow Control  
Automatic RS-485 Half-duplex Direction  
Control Output via RTS#  
NOTE: 1 Covered by U.S. Patent #5,649,122  
Wireless Infrared (IrDA 1.0) Encoder/Decoder  
Automatic sleep mode  
APPLICATIONS  
Full modem interface  
Portable Appliances  
Device Identification and Revision  
Telecommunication Network Routers  
Ethernet Network Routers  
Crystal oscillator (up to 32MHz) or external clock  
(upto 64MHz) input  
Cellular Data Devices  
48-TQFP and 32-QFN packages  
Factory Automation and Process Controls  
FIGURE 1. XR16M2750 BLOCK DIAGRAM  
1.62 to 3.6 Volt VCC  
A2:A0  
D7:D0  
GND  
IOR#  
IOW#  
UART Channel A  
TXA, RXA, DTRA#,  
64 Byte TX FIFO  
CSA#  
CSB#  
UART  
DSRA#, RTSA#,  
DTSA#, CDA#, RIA#,  
OP2A#  
Regs  
IR  
ENDEC  
TX & RX  
8-bit Data  
Bus  
Interface  
INTA  
INTB  
BRG  
64 Byte RX FIFO  
TXRDYA#  
TXRDYB#  
RXRDYA#  
RXRDYB#  
TXB, RXB, DTRB#,  
DSRB#, RTSB#,  
CTSB#, CDB#, RIB#,  
OP2B#  
UART Channel B  
(same as Channel A)  
Reset  
XTAL1  
XTAL2  
Crystal Osc/Buffer  
2750BLK  
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com  

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