Datasheet > 微控制器和处理器 > 串行 IO/通信控制器> XR17V252

XR17V252

更新时间： 2024-11-23 03:53:03

品牌	Logo	应用领域
艾科嘉 - EXAR		PC
页数	文件大小	规格书
69页	1498K
描述
66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT

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XR17V252 数据手册

XR17V252

66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT

MARCH 2006

REV. 1.0.1

GENERAL DESCRIPTION

• Multi-port RS-232/RS-422/RS-485 Cards

• Point-of-Sale Systems

FEATURES

The XR17V252 (V252) is a single chip 2-channel

66MHz PCI UART (Universal Asynchronous Receiver

and Transmitter) solution, optimized for higher

performance and lower power. The V252 device with

its fifth generation register set is designed to meet the

• High performance 32-bit 66MHz PCI UART

• PCI 3.0 compliant

high

bandwidth

and

power

management

• PCI power management rev. 1.1 compliant

• EEPROM interface for PCI configuration

• 3.3V supply with 5V tolerant non-PCI (serial) inputs

• Data read/write burst operation

requirements for multi-serial communication ports for

system administration and management. The 32-bit

66MHz PCI interface is compliant with PCI 3.0 and

PCI power management revision 1.1 specifications.

The device provides an upgrade path for Exar’s

33MHz 5V and Universal PCI UART family.

• Global interrupt register for both UART channels

• Up to 8 Mbps serial data rate

The V252 consists of two independent UART

channels, each with set of configuration and

enhanced registers, 64 bytes of Transmit (TX) and

Receive (RX) FIFOs, and a fractional Baud Rate

Generator (BRG). A global interrupt source register

provides a complete interrupt status indication for

both channels to speed up interrupt parsing. The

V252 device operates at 33/66MHz and features fully

programmable TX and RX FIFO level triggers,

automatic hardware and software flow control, and

automatic RS-485 half duplex direction control output

for software and hardware design simplification.

• Eight multi-purpose inputs/outputs

• A 16-bit general purpose timer/counter

• Sleep mode with wake-up Indicator

• Two independent UART channels controlled with

■ 16C550 compatible register Set

■ 64-byte TX and RX FIFOs with level counters

and programmable trigger levels

■ Fractional baud rate generator

NOTE 1: Covered by U.S. Patents #5,649,122 and #5,949,787

■ Automatic RTS/CTS or DTR/DSR hardware

flow control with programmable hysteresis

APPLICATIONS

■ Automatic Xon/Xoff software flow control

• Remote Access Servers

■ RS-485 half duplex direction control output

• Storage Network Management

• Factory Automation and Process Control

• Instrumentation

with selectable turn-around delay

• Infrared (IrDA 1.0) data encoder/decoder

FIGURE 1. BLOCK DIAGRAM OF THE XR17V252

3.3 V VCC

(5 V Tolerant

Serial Inputs)

CLK( up to

66 MHz)

RST#

UART Channel 0

AD[31:0]

64 Byte TX FIFO

TX0 , RX0 , DTR0#,

UART

C/BE[3:0]#

FRAME#

Regs

DSR0 #, RTS0#,

CTS0 #, CD0 #,RI0#

ENDEC

TX & RX

PCI Local

IRDY#

BRG

64 Byte RX FIFO

Device

Bus

TRDY#

Configuration

Interface

DEVSEL#

Registers

UART Channel 1

STOP#

INTA#

IDSEL

PERR#

SERR#

TX1 , RX1 , DTR1#,

64 Byte TX FIFO

UART

Regs

DSR1 #, RTS1#,

CTS1 #, CD1 #,RI1#

TX & RX

ENDEC

BRG

64 Byte RX FIFO

PAR

Configuration

PME#

Space

Registers

16-bit

Timer/Counter

Multi-purpose

EECK

EEDI

MPIO0- MPIO7

EEPROM

Interface

Inputs/ Outputs

EEDO

EECS

XTAL1

XTAL2

Crystal Osc / Buffer

ENIR

EN485#

TMRCK

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com

12 3 4 5 6 7...69

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与XR17V252相关器件

型号	品牌	获取价格	描述	数据表
XR17V252_08	EXAR	获取价格	66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT
XR17V252IM	EXAR	获取价格	66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT
XR17V252IM-F	EXAR	获取价格	Serial I/O Controller, PQFP100
XR17V254	EXAR	获取价格	66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT
XR17V254_08	EXAR	获取价格	66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT
XR17V254IV	EXAR	获取价格	66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT
XR17V254IV-F	EXAR	获取价格	暂无描述
XR17V258	EXAR	获取价格	66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
XR17V258_08	EXAR	获取价格	66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
XR17V258IV	EXAR	获取价格	66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT

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