參數(shù)資料
型號: CD1284
廠商: Intel Corp.
英文描述: IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
中文描述: 符合IEEE 1284兼容并行接口控制器兩個高速異步串行端口
文件頁數(shù): 84/176頁
文件大小: 2255K
代理商: CD1284
CD1284
IEEE 1284-Compatible Parallel Interface Controller
84
Datasheet
At reset, all bits in the GPIO are cleared and the signals are programmed as inputs.
Note:
Interrupts are not generated on signal changes within the General-Purpose I/O port; the CPU must
periodically poll GPIO to detect changes in external conditions. Therefore, if it is necessary to
detect changes, use the port with signals that change with low-duty cycles.
5.16
Parallel Port Interface
The CD1284 parallel port signals are implemented with Level 2 characteristics
as defined in the
IEEE STD 1284 specification with the exception of transient protection. The port can be directly
connected to the interface cable with the addition of a few external components. The components
consist of passive pull-up resistors, series-impedance-matching resistors, and clipping diodes.
Additional noise-filtering may be required in an end system.
Figure 13 on page 85
shows a typical
interface with the components listed above.
Some system designs may require buffers between the CD1284 and the cable. Systems that require
drive cables longer than the specified maximum of 10 m or those that need to protect the CD1284
require inexpensive buffers between it and the cable. The device provides two signal outputs,
PDBEN and EBDIR, that can to connect and control buffers (such as, 74AS245 or equivalent).
These signals do not allow direct control of the buffer. However, the addition of an XNOR gate
provides both an enable control signal and a signal to select the direction of the buffer. PDBEN and
EBDIR are outputs from the control state machine that indicate its current state (see
Figure 14 on
page 86
).
相關(guān)PDF資料
PDF描述
CD13002 NPN SILICON PLANAR EPITAXIAL, HIGH VOLTAGE FAST SWITCHING POWER TRANSISTOR
CD14538 CMOS DUAL PRECISION MONOSTABLE MULTIVIBRATOR
CD14538BMS CMOS Dual Precision Monostable Multivibrator
CD15B-15MB CD105B
CD105B CD105B
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CD-12AFFM-QL8D01 功能描述:MIDDLE 制造商:amphenol ltw 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:10
CD-12AFFM-QR8D01 功能描述:MIDDLE 制造商:amphenol ltw 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:10
CD-12AMMM-QL8D01 功能描述:MIDDLE 制造商:amphenol ltw 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:10
CD-12BFFA-LL7001 功能描述:MIDDLE 制造商:amphenol ltw 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:10
CD-12BFFA-QL8SP0 功能描述:CONN PLUG FMALE 12POS CRIMP 制造商:amphenol ltw 系列:X-Lok 包裝:散裝 零件狀態(tài):在售 連接器類型:插頭,母型插口 針腳數(shù):12(數(shù)據(jù)) 外殼尺寸 - 插件:C 外殼尺寸,MIL:- 安裝類型:自由懸掛 端接:壓接 緊固類型:推挽式 朝向:帶標(biāo)記 侵入防護(hù):IP68 - 防塵,防水 外殼材料,鍍層:聚酰胺(PA),尼龍,玻璃纖維增強(qiáng)型 觸頭鍍層:金 特性:后殼,應(yīng)力消除 電壓 - 額定:- 額定電流:5A 觸頭鍍層厚度:- 工作溫度:-20°C ~ 80°C 標(biāo)準(zhǔn)包裝:1