CT74LS48的引脚
\u5355\u7247\u673a\u80fd\u5f15\u811a\u63a5\u5f15\u811a\u5417\uff1f\u53ef\u4ee5\u7684 \u53ea\u8981\u8bbe\u8ba1\u9700\u8981 \u5c31\u53ef\u4ee5\uff0c\u5982\u626b\u63cf\u952e\u76d8 \u5c31\u662f IO \u4e0e IO \u7528\u6309\u94ae \u8fde\u63a5 \u8bfb\u53d6\u72b6\u6001\u3002
\u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4eff\u771f\u5b9e\u4f8b\uff0c\u8bd5\u8bd5\u3002
\u7528\u6570\u5b57\u4e07\u7528\u8868\uff0c\u5904\u4e8e\u4e8c\u6781\u7ba1\u6863\uff0c\u5206\u522b\u7528\u7ea2\u3001\u9ed1\u8868\u7b14\u63a5\u89e6LED\u76842\u4e2a\u5f15\u811a\uff0c\u4e0d\u4eae\uff0c\u4ea4\u6362\u8868\u7b14\uff0cLED\u4eae\uff0c\u7ea2\u7b14\u63a5\u7684\u5c31\u662fLED\u7684\u6b63\u6781\uff0c\u9ed1\u7b14\u63a5\u7684\u5c31\u662fLED\u7684\u8d1f\u6781\u3002
BCD-7段译码显示驱动器，从手册上找的1脚：A 2脚：B 3脚：LT低电平有效 4脚：BI/RBO低电平有效
5脚：RBI低电平有效 6脚：C 7脚：D 8脚：地 9脚：e
10脚：d 11:c 12:b 13:a 14:g 15:f 16:VCC
LT灯测试 BI消隐输入 RBO消隐输出 RBI消隐输入
绛旓細1鑴氾細A 2鑴氾細B 3鑴氾細LT浣庣數骞虫湁鏁 4鑴氾細BI/RBO浣庣數骞虫湁鏁 5鑴氾細RBI浣庣數骞虫湁鏁 6鑴氾細C 7鑴氾細D 8鑴氾細鍦 9鑴氾細e 10鑴氾細d 11:c 12:b 13:a 14:g 15:f 16:VCC LT鐏祴璇 BI娑堥殣杈撳叆 RBO娑堥殣杈撳嚭 RBI娑堥殣杈撳叆 ...
绛旓細浣滀负杈撳叆(BI)浣庣數骞虫椂,G21涓0,鎵鏈夊瓧娈佃緭鍑虹疆0,鍗冲疄鐜版秷闅愬姛鑳姐備綔涓鸿緭鍑(RBO),鐩稿綋浜嶭T,鍙CT0鐨勪笌鍧熺郴,鍗矻T=1,RBI=0,DCBA=0000鏃惰緭鍑轰綆鐢靛钩,鍙疄鐜板姩鎬佺伃闆跺姛鑳姐3鍙(LT)绔湁鏁堜綆鐢靛钩鏃,V20=1,鎵鏈夊瓧娈电疆1,瀹炵幇鐏祴璇曞姛鑳姐寮曡剼鍔熻兘璇存槑1銆7娈佃瘧鐮佸姛鑳(LT=1,RBI=1)鍦ㄧ伅娴嬭瘯杈撳叆绔(LT)鍜屽姩鎬佺伃...
绛旓細CT74LS190娌℃湁涓撻棬鐨勭疆0杈撳叆绔,浣嗗彲浠ュ熷姪浜庢暟鎹瓺3D2D1D0=0000鏃,瀹炵幇璁℃暟鍣ㄧ殑缃0鍔熻兘銆74LS190鐨勫紩鑴鍥俱佸姛鑳借〃濡備笅鍥炬墍绀恒4.1.1 74LS190鐨勫紩鑴氬浘琛4.1.1 74LS190鐨勫姛鑳借〃杈撳叆 杈撳嚭CP R0(1) R0(2) S9(1) S9(2) QA QB QC QDX 1 1 0 X 0 0 0 0 1 1 X 0 0 0 0 0 X X 1 1 1...
绛旓細(1)CT74LS161鐨勫紩鑴鎺掑垪鍜岄昏緫鍔熻兘绀烘剰鍥炬敞:74LS163鐨勫紩鑴氭帓鍒楀拰74LS161鐩稿悓,涓嶅悓涔嬪鏄74LS163閲囩敤鍚屾娓呴浂鏂瑰紡.(2)CT74LS161鐨勯昏緫鍔熻兘鈶=0鏃跺紓姝ユ竻闆.C0=0鈶=1,=0鏃跺悓姝ュ苟琛岀疆鏁.鈶==1涓擟PT=CPP=1鏃,鎸夌収4浣嶈嚜鐒朵簩杩涘埗鐮佽繘琛屽悓姝ヤ簩杩涘埗璁℃暟.鈶==1涓擟PT路CPP=0鏃,璁℃暟鍣ㄧ姸鎬佷繚鎸佷笉鍙.4,鍙嶉缃...
绛旓細74LS90鐨勫紩鑴鍥惧強鍏跺姛鑳藉浘濡備笅鍥炬墍绀: 74LS90寮曡剼鍥74LS90 鍔熻兘琛 3.璁℃暟鍣ㄦ湰璁捐鎵閲囩敤鐨勬槸鍗佽繘鍒惰鏁板櫒74SL160,鏍规嵁鏃跺垎绉掑悇涓儴鍒嗙殑鐨勪笉鍚屽姛鑳,璁捐鎴愪笉鍚岃繘鍒剁殑璁℃暟鍣ㄣ傜鐨勪釜浣,闇瑕10杩涘埗璁℃暟鍣,鍗佷綅闇6杩涘埗璁℃暟鍣(璁℃暟鍒59鏃舵竻闆跺苟杩涗綅),绉掗儴鍒嗚璁′笌鍒嗛挓鐨勮璁″畬鍏ㄧ浉鍚;鏃堕儴鍒嗙殑璁捐涓哄綋鏃堕挓璁℃暟鍒...
绛旓細娈甸夋病閫変笂),濡傛灉鍙湁涓涓樉绀轰笉鍑烘潵閭ｄ釜鏁板瓧閭ｅ氨鍙兘鏄偅娈佃繛绾跨殑浣嶉夌嚎杩炴帴鎴栬呬綅閫夋暟鎹湁闂(浣嶉夋病閫変笂),濡傛灉纭閮芥病闂閭ｅ氨鏄潖浜.杩樻湁浣犻偅涓笉浜殑涔熸槸鐪嬬湅椹卞姩鏁版嵁鍜岀‖浠惰繛鎺,瑕佹槸涔熺‘瀹氭病闂,鑰屼笖浠涔堟暟鎹兘涓嶆樉绀哄彧鑳借鏄庡潖浜.澶氬崐搴旇鏄綅閫夋病閫変笂....
绛旓細74LS48灞炰簬TTL鐢佃矾锛屽簲璇ュ湪TTL鍏冧欢搴撻噷銆備笅闈㈡槸寮曡剼鍥撅紝鐢卞紩鑴氬浘鍙互鐪嬪嚭锛4鍙绠¤剼绔叿鏈夎緭鍏ュ拰杈撳嚭鍙岄噸鍔熻兘銆備綔涓鸿緭鍏ワ紙BI锛変綆鐢靛钩鏃讹紝G21涓0锛屾墍鏈夊瓧娈佃緭鍑虹疆0锛屽嵆瀹炵幇娑堥殣鍔熻兘銆備綔涓鸿緭鍑猴紙RBO锛夛紝鐩稿綋浜嶭T锛屽強CT0鐨勪笌鍧熺郴锛屽嵆LT=1锛孯BI=0锛孌CBA=0000鏃惰緭鍑轰綆鐢靛钩锛屽彲瀹炵幇鍔ㄦ佺伃闆跺姛鑳姐3鍙凤紙...
