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XR16M2551 PDF预览

XR16M2551

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
51页 1191K
描述
HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE

XR16M2551 数据手册

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XR16M2551  
HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE  
MAY 2007  
REV. 1.0.2  
FEATURES  
GENERAL DESCRIPTION  
1.62 to 3.63 Volt Operation  
1
The XR16M2551 (M2551) is a high performance  
dual universal asynchronous receiver and transmitter  
(UART) with 16 byte TX and RX FIFOs. The device  
operates from 1.62 to 3.63 volts and is pin-to-pin  
compatible to the XR16L2551 and XR16V2551. The  
M2551 includes 2 additional capabilities over the  
XR16M2550: Intel and Motorola data bus selection  
and a “PowerSave” mode to minimize the sleep  
current. It supports Exar’s enhanced features of  
selectable FIFO trigger level, automatic hardware  
(RTS/CTS) and software flow control, and a complete  
modem interface. An internal loopback capability  
Pin-to-pin compatible to Exar’s XR16V2551 and the  
XR16L2551  
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 16 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 with wake-up interrupt  
Full modem interface  
allows  
system  
diagnostics.  
Independent  
programmable fractional baud rate generators are  
provided in each channel to select data rates up to 16  
Mbps at 3.3 Volt and 4X sampling clock. The M2551  
is available in 48-pin TQFP and 32-pin QFN  
packages.  
NOTE: 1 Covered by U.S. Patent #5,649,122  
APPLICATIONS  
PowerSave Feature reduces sleep current to 15 µA  
Device Identification and Revision  
Portable Appliances  
Telecommunication Network Routers  
Ethernet Network Routers  
Crystal oscillator (up to 24MHz) or external clock  
(up to 64MHz) input  
48-TQFP and 32-QFN packages  
Cellular Data Devices  
Factory Automation and Process Controls  
FIGURE 1. XR16M2551 BLOCK DIAGRAM  
1.62 to 3.63V VCC  
GND  
PwrSave  
A2:A0  
D7:D0  
UART Channel A  
IOR# (VCC)  
IOW# (R/W#)  
CSA# (CS#)  
TXA, RXA, DTRA#,  
16 Byte TX FIFO  
UART  
Regs  
DSRA#, RTSA#,  
DTSA#, CDA#, RIA#,  
OP2A#  
IR  
TX & RX  
ENDEC  
CSB# (A3)  
BRG  
INTA (IRQ#)  
16 Byte RX FIFO  
INTB (logic 0)  
TXB, RXB, DTRB#,  
DSRB#, RTSB#,  
CTSB#, CDB#, RIB#,  
OP2B#  
TXRDYA#  
TXRDYB#  
RXRDYA#  
RXRDYB#  
UART Channel B  
(same as Channel A)  
Intel or  
Motorola  
Data Bus  
Interface  
XTAL1  
XTAL2  
Reset (Reset#)  
16/68#  
Crystal Osc/Buffer  
CLKSEL  
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com  

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