PFBK 164
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廈門莫格電氣自動(dòng)化有限公司經(jīng)過(guò)幾年的快速發(fā)展，現(xiàn)已成為國(guó)內(nèi)實(shí)力的工控備件商之一，
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PFBK 164
廈門莫格電氣自動(dòng)化有限公司是一家專業(yè)提供工業(yè)自動(dòng)化領(lǐng)域的備件服務(wù)商，產(chǎn)品品種齊全、價(jià)格合理，公司實(shí)力雄厚，重信用、守合同、保證產(chǎn)品質(zhì)量，以多品種經(jīng)營(yíng)特色和薄利多銷的原則，贏得了廣大客戶的信任。
我們主營(yíng)PLC可編程控制器模塊，DCS卡件，ESD系統(tǒng)卡件，振動(dòng)監(jiān)測(cè)系統(tǒng)卡件，汽輪機(jī)控制系統(tǒng)模塊，燃?xì)獍l(fā)電機(jī)備件等，公司致力于為工業(yè)用戶提供自動(dòng)化解決方案，打造工控備件一站式供應(yīng)平臺(tái)。
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(a)配置成16位復(fù)用地址/數(shù)據(jù)總線的工作方式
(b)配置成8位非復(fù)用地址/數(shù)據(jù)總線的工作方式
(4)片內(nèi)EPROM 片內(nèi)256k位的EPROM，可配置為32k×8或16k×16，為優(yōu)化地址譯碼而劃分為8個(gè)相等的可映射存儲(chǔ)塊，每個(gè)存儲(chǔ)塊結(jié)構(gòu)為4k×8或2k×16，由PADA的輸出ES0～ES7來(lái)選擇。存儲(chǔ)器的訪問(wèn)時(shí)間為90ns，包括輸入鎖存和PAD地址譯碼的時(shí)間。
(5)片內(nèi)RAM 片內(nèi)16k靜態(tài)RAM：可配置為2k×8或1k×16，由PADA的輸出RSO來(lái)選擇。它的訪問(wèn)時(shí)間也為90ns，包括輸入鎖存和PAD地址譯碼的時(shí)間。
(6)片內(nèi)加密 可實(shí)現(xiàn)PSD3系列芯片的配置加密和PAD的譯碼加密。由于傳統(tǒng)的硬件電路是由散件構(gòu)成，通過(guò)測(cè)試單個(gè)器件，比較容易破譯電路的設(shè)計(jì)。而PSD3系列芯片的高度集成和本身的加密功能使得電路和程序無(wú)法破譯。
其余的PSD系列芯片在功能上比PSD3更強(qiáng)，主要表現(xiàn)在I/O引腳的增多、EPROM、SRAM容量的擴(kuò)充和PLD的輸入、輸出與乘積項(xiàng)上。如：PSD503，I/O引腳有40個(gè)，PLD的輸入有61個(gè)，乘積項(xiàng)有140個(gè)，中斷有8級(jí)，定時(shí)器/計(jì)數(shù)器有4個(gè)，EPROM有1M，SRAM有16k，且?guī)в泻髠潆姵?。再如：PSD813F1是在系統(tǒng)可編程器件，無(wú)需硬件編程器，可實(shí)現(xiàn)整個(gè)芯片內(nèi)的所有功能塊的配置和程序EPROM的寫入。
4、應(yīng)用實(shí)例
例1：目前，8031系列單片機(jī)應(yīng)用特別廣泛，使用PSD312與8031構(gòu)成單片機(jī)的硬件核心。8031用信號(hào)訪問(wèn)PSD312中程序存儲(chǔ)器，用讀寫PSD312的數(shù)據(jù)存儲(chǔ)器。將PSD312的程序存儲(chǔ)器配置成8個(gè)8k×8的存儲(chǔ)塊，數(shù)據(jù)存儲(chǔ)器配置成一個(gè)2k×8的存儲(chǔ)塊。因?yàn)榈刂纷g碼空間為64k，所以PC0、PC1、PC2配置成I/O端口，不作A16、A17、A18之用。又因?yàn)?031是以8位數(shù)據(jù)/地址復(fù)用方式工作的，所以，將PSD312配置成8位數(shù)據(jù)/地址復(fù)用工作方式，此時(shí)端口A也配置成I/O端口。
例2：在數(shù)字信號(hào)處理領(lǐng)域中，微控制器TMS320系列芯片的應(yīng)用很廣泛，使用PSD100芯片作為TMS320C25的外圍接口芯片，以此構(gòu)成用于數(shù)字信號(hào)處理方面的單片機(jī)的核心電路，比以前用散件構(gòu)成要簡(jiǎn)單得多。PSD100是數(shù)字信號(hào)處理器(DSP)的外圍接口芯片，它是非數(shù)據(jù)/地址復(fù)用型，可與8位或16位數(shù)據(jù)總線的微控制器相接，內(nèi)有128k位的EPROM，32k位的SRAM，存儲(chǔ)器訪問(wèn)時(shí)間為32ns。在圖3中，PSD100配置成八個(gè)1k×16的EPROM。兩個(gè)1k×16的SRAM。TMS320C25用PS選擇PSD100的程序存儲(chǔ)器。用DS選擇PSD100的數(shù)據(jù)存儲(chǔ)器。由于PSD100沒(méi)有專門引腳用作片內(nèi)EPROM的讀脈沖輸入(不同于PSD3XX系列芯片)，這對(duì)PSD100來(lái)說(shuō)，其程序和數(shù)據(jù)存儲(chǔ)器在同一存儲(chǔ)空間，所以，將PS連接到A18，將DS連接到A17，使用不同的地址空間映射，來(lái)選擇程序和數(shù)據(jù)存儲(chǔ)器。
5、結(jié)束語(yǔ)
現(xiàn)在，PSD系列芯片的功能和優(yōu)點(diǎn)尚未被許多人所認(rèn)識(shí)，大多數(shù)人還習(xí)慣于用散件來(lái)構(gòu)造單片機(jī)外圍電路，這種思維方法必將隨著PSD系列芯片的普及應(yīng)用而發(fā)生改變。
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