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XR16L570_07

更新时间： 2024-09-17 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 972K
描述
SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE

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XR16L570  
SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE  
MAY 2007  
REV. 1.0.1  
FEATURES  
GENERAL DESCRIPTION  
• Smallest Full Featured UART  
• 1.62V to 5.5V Supply Voltage  
• 5V Tolerant Inputs (except XTAL1/CLK)  
• ’0 ns’ Address Hold Time (TAH and TADH  
• Software Compatible to industry standard 16C450,  
16C550, ST16C580, ST16C650A, XR16C850 and  
XR16L580  
The XR16L570 (L570) is a 1.62 to 5.5 volt Universal  
Asynchronous Receiver and Transmitter (UART) with 5 volt  
tolerant inputs and a reduced pin count. It is software  
compatible to industry standard 16C450, 16C550,  
ST16C580, ST16C650A, XR16C850 and XR16L580  
UARTs. It has 16 bytes of TX and RX FIFOs and is capable  
of operating with a serial data rate of up to 4 Mbps at 5V, 3  
Mbps at 3.3V,1 Mbps at 2.5V and 750 Kbps at 1.8V. The  
internal registers are compatible to the 16C550 register set  
plus enhanced registers for additional features to support  
today’s high bandwidth data communication needs. The  
)
• 16-byte Transmit FIFO  
• 16-byte Receive FIFO with Errors Flags  
• Selectable RX and TX FIFO Trigger Levels  
• Automatic Hardware (RTS/CTS) Flow Control  
• Automatic Software (Xon/Xoff) Flow Control  
• Up to 4 Mbps data rate at 5.0V Operation  
• Up to 3 Mbps data rate at 3.3V Operation  
• Up to 1 Mbps data rate at 2.5V Operation  
• Up to 750 Kbps data rate at 1.8V Operation  
• Infrared (IrDA) Encoder/Decoder  
enhanced features include  
automatic hardware and  
software flow control to prevent data loss, selectable RX  
and TX trigger levels for more efficient interrupt service,  
wireless infrared (IrDA) encoder/decoder for wireless  
applications and a unique Power-Save mode to increase  
battery operating time. The device comes in 32-QFN and  
24-QFN packages in industrial temperature range.  
APPLICATIONS  
• Handheld Terminals and Tablets  
• Handheld Computers  
• Wireless Portable Point-of-Sale Terminals  
• Cellular Phones DataPort  
• GPS Devices  
• Personal Digital Assistants Modules  
• Battery Operated Instruments  
• Complete Modem Interface  
• Power-Save Mode to conserve battery power  
• Sleep Mode with Wake-up Interrupt  
• Very small packages: 24-QFN (4x4x0.9mm) and 32-QFN  
(5x5x0.9mm)  
• Industrial Temperature Grade(-40 to +85oC)  
FIGURE 1. BLOCK DIAGRAM  
VCC  
(1.62 to 5.5 V)  
*5 V Tolerant Inputs  
(Except for CLK)  
PwrSave  
A2:A0  
GND  
D7:D0  
IOR#  
UART  
TX  
RX  
IOW#  
CS#  
16 Byte TX FIFO  
RTS#  
CTS#  
DTR#  
DSR#  
CD#  
RI#  
UART  
Regs  
IR  
TX & RX  
ENDEC  
INT  
Data Bus  
Interface  
RESET  
16 Byte RX FIFO  
Clock Buffer  
BRG  
XTAL1 (CLK)  
XTAL2  
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com  
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