參數(shù)資料
型號: XR17V252IM
廠商: Exar Corporation
文件頁數(shù): 24/69頁
文件大小: 0K
描述: IC UART PCI BUS DUAL 100TQFP
產(chǎn)品變化通告: Leaded UART, V&I Obsolescence 11/Apr/2011
標準包裝: 90
特點: *
通道數(shù): 2,DUART
FIFO's: 64 字節(jié)
規(guī)程: RS485
電源電壓: 3.3V,5V
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
安裝類型: 表面貼裝
封裝/外殼: 100-TQFP
供應(yīng)商設(shè)備封裝: 100-TQFP(14x14)
包裝: 托盤
XR17V252
30
66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT
REV. 1.0.2
4.2
Automatic Hardware (RTS/CTS or DTR/DSR) Flow Control Operation
Automatic hardware or RTS/DTR and CTS/DSR flow control is used to prevent data overrun to the local
receiver FIFO and remote receiver FIFO. The RTS#/DTR# output pin is used to request remote unit to
suspend/restart data transmission while the CTS#/DSR# input pin is monitored to suspend/restart local
transmitter. The auto RTS/DTR and auto CTS/DSR flow control features are individually selected to fit specific
application requirement and enabled through EFR bit[6:7] and MCR bit [2] for either RTS/CTS or DTR/DSR
control signals. The auto RTS/DTR function must be started by asserting RTS/DTR# output pin (MCR bit [0] or
bit [1] to logic 1) after it is enabled. Figure 12 below explains how it works.
Two interrupts associated with RTS/DTR and CTS/DSR flow control have been added to give indication when
RTS/DTR# pin or CTS/DSR# pin is de-asserted during operation. The RTS/DTR and CTS/DSR interrupts must
be first enabled by EFR bit [4], and then enabled individually by IER bits [7:6], and chosen with MCR bit [2].
Automatic hardware flow control is selected by setting bits [7 (CTS): 6 (RTS)] of the EFR register to logic 1. If
CTS# pin transitions from LOW to HIGH indicating a flow control request, ISR bit [5] will be set to logic 1, (if
enabled via IER bit [7:6]), and the UART will suspend TX transmissions as soon as the stop bit of the character
in process is shifted out. Transmission is resumed after the CTS# input returns to LOW, indicating more data
may be sent.
相關(guān)PDF資料
PDF描述
XR17V254IV-F IC UART PCI BUS QUAD 144LQFP
XR17V258IV-F IC UART PCI BUS OCTAL 144LQFP
XR17V352IB113-F IC UART PCIE 256B DUAL 113FPBGA
XR17V354IB176-F IC UART PCIE 256B QUAD 176FPBGA
XR17V358IB176-F IC UART PCIE OCTAL 176FPBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR17V252IM-0A-EVB 功能描述:UART 接口集成電路 Supports V252 100 ld TQFP, PCI Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR17V252IM-F 功能描述:UART 接口集成電路 66MHz Dual PCI UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR17V252IMTR-F 制造商:Exar Corporation 功能描述:UART 2-CH 64Byte FIFO 3.3V 100-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR17V252IMTR-F
XR17V254 制造商:EXAR 制造商全稱:EXAR 功能描述:66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT
XR17V254_08 制造商:EXAR 制造商全稱:EXAR 功能描述:66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT