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XR16M2650 PDF预览

XR16M2650

更新时间: 2024-11-22 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
47页 1112K
描述
HIGH PERFORMANCE LOW VOLTAGE DUART WITH 32-BYTE FIFO

XR16M2650 数据手册

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XR16M2650  
HIGH PERFORMANCE LOW VOLTAGE DUART WITH 32-BYTE FIFO  
MAY 2007  
REV. 1.0.2  
FEATURES  
GENERAL DESCRIPTION  
1.62 to 3.63 Volt Operation  
1
The XR16M2650 (M2650) is a high performance  
dual universal asynchronous receiver and transmitter  
(UART) with 32 bytes TX and RX FIFOs. The device  
operates from 1.62 to 3.63 volts and is pin-to-pin and  
software compatible to the ST16C2550, XR16V2550  
and XR16V2650. It supports Exar’s enhanced  
features of selectable FIFO trigger level, automatic  
hardware (RTS/CTS) and software flow control, 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 16 Mbps at 3.3 Volt with 4X  
sampling clock. The M2650 is available in 48-pin  
TQFP and 32-pin QFN packages.  
Pin-to-pin and software compatible to ST16C2550  
in the 48-TQFP package  
Pin-to-pin and software compatible to XR16L2550,  
XR16V2550 and XR16V2650  
Two independent UART channels  
Register set is 16550 compatible  
Data rate of up to 16 Mbps at 3.3 V  
Data rate of up to 12.5 Mbps at 2.5 V  
Data rate of up to 8 Mbps at 1.8V  
Fractional Baud Rate Generator  
Transmit and Receive FIFOs of 32 bytes  
Selectable TX and RX FIFO Trigger Levels  
Automatic Hardware (RTS/CTS) Flow Control  
Automatic Software (Xon/Xoff) Flow Control  
Wireless Infrared (IrDA 1.0) Encoder/Decoder  
Automatic sleep mode  
NOTE: 1 Covered by U.S. Patent #5,649,122  
APPLICATIONS  
Portable Appliances  
Telecommunication Network Routers  
Ethernet Network Routers  
Full modem interface  
Device Identification and Revision  
Cellular Data Devices  
Crystal oscillator (up to 24MHz) or external clock  
(up to 64MHz) input  
Factory Automation and Process Controls  
48-TQFP and 32-QFN packages  
FIGURE 1. XR16M2650 BLOCK DIAGRAM  
1.62 to 3.63 Volt VCC  
A2:A0  
D7:D0  
GND  
IOR#  
IOW#  
UART Channel A  
TXA, RXA, DTRA#,  
32 Byte TX FIFO  
CSA#  
CSB#  
UART  
DSRA#, RTSA#,  
CTSA#, CDA#, RIA#,  
OP2A#  
Regs  
IR  
ENDEC  
TX & RX  
8-bit Data  
Bus  
Interface  
INTA  
INTB  
BRG  
32 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  
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com  

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