{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","id":"38270854-596f-4a26-8183-db8c968c6020","uuid":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","normalized_title":"编码隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","isbns":["9787121181184","0123456789","6044921875","3039331000","0000000000","0000000000000"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":438,"navigation_url":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020","title_url":"https://workshop.closeclaw.top/ai/title/%E7%BC%96%E7%A0%81%20%E9%9A%90%E5%8C%BF%E5%9C%A8%E8%AE%A1%E7%AE%97%E6%9C%BA%E8%BD%AF%E7%A1%AC%E4%BB%B6%E8%83%8C%E5%90%8E%E7%9A%84%E8%AF%AD%E8%A8%80","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/38270854-596f-4a26-8183-db8c968c6020","page_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/page","search_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/search"},"page":{"printed_page":271,"pdf_page":287,"physical_index":287,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"da3ffcef31194443edeb110a2d163196385acbef8b6ec3d7ace370f3a0a15128"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"《TTL数据手册》中其至还囊括了这个芯片中每个触发器的逻辑图。\n\n除了使用的是异或门外，你会发现上面的这个图与第14章结尾的图很相似。《TTL数据手册》中的逻辑表也稍微不同。\n\n表格中， $^ { \\ast } \\mathrm { { H } ^ { \\prime \\prime } }$ 代表高电平，“L”代表低电平。当然，可以将这些想象成1和 $\\scriptstyle \\mathbf { 0 } _ { \\circ }$ 在触发器中，预置（Pre）和清零输入（Clr）通常为0；这里通常为1。\n\n继续阅读《TTL数据手册》会发现，7483芯片是一个4位二进制全加法器，74151是一个8-1的数据选择器，74154芯片是一个4-16的解码器，74161芯片是一个4位同步二进制计数器，以及74175芯片是一个带清零的4输入D型触发器。从上述芯片中挑出两种可以制作一个8位锁存器。\n\n现在你应该知道我是怎么想出从第11章中就开始使用的这么多不同种类的组件的，这些都是从《TTL数据手册》借鉴而来。\n\n18 从算盘到芯片\n\n271","previous_page":270,"next_page":272}