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id="i0w6msu" class="authorTimeSource"> <span>作者：</span> <span>時間：2023-01-04</span> <span>來源：半導(dǎo)體產(chǎn)業(yè)縱橫</span> <link rel="stylesheet" type="text/css"/> <span style="float:right; width:150px;margin-right:0px; text-align:right;"> <div id="am6oiaw" class="nav0"> <ul> <li style="width:150px;"><a href="javascript:void(0);"><img src="http://www.ex-cimer.com/event/action/images/icon_add_4.png" width="20" border="0" align="absmiddle" />英飛凌汽車電子生態(tài)圈</a> <ul> <li style="width:150px;text-align:center;"><img src="http://www.ex-cimer.com/event/company/images/code_2.jpg" width="150"><br />掃碼關(guān)注<br />獲取最新最全汽車電子<br />技術(shù)方案與實用技巧</li> </ul> </li> </ul> </div> </span> <span style="float:right; width:30px;margin-right:0px; text-align:right;"><a rel="nofollow">收藏</a></span> </div> <div id="0oo0s0o" class="hAd4_Afinal20a_back">  <iframe id='a890e388' name='a890e388' src='https://ad.eepw.com.cn/www/delivery/afr.php?zoneid=88&cb=INSERT_RANDOM_NUMBER_HERE' frameborder='0' scrolling='no' width='660' height='60'><a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=88&cb=INSERT_RANDOM_NUMBER_HERE&n=a635e61e' border='0' alt='' /></a></iframe> </div> <div style="margin-top:28px;"></div> <div id="gesgiom" class="content" id="contentDiv" style="position:relative;"> <div id="a00omu0" class="ad_300x180_Afinal13_back">  <iframe id='a225770a' name='a225770a' src='https://ad.eepw.com.cn/www/delivery/afr.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE' frameborder='0' scrolling='no' width='300' height='200'><a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE&n=a576c0a2' border='0' alt='' /></a></iframe> </div> <span id="contentlabels" style="font-size:14px;"><p style="text-indent: 2em; text-align: left;">最近<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/特斯拉"><em>特斯拉</em></a>再次成為了焦點。一方面，CEO馬斯克在推特的一舉一動引發(fā)話題；另一方面<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/特斯拉"><em>特斯拉</em></a>公司陷入各種困境：上海工廠停產(chǎn)計劃延期、大量訂單被取消、股市表現(xiàn)崩盤......</p>本文引用地址：<a href="http://www.ex-cimer.com/article/202301/442346.htm">http://www.ex-cimer.com/article/202301/442346.htm</a><p style="text-indent: 2em; text-align: left;">山雨欲來風(fēng)滿樓，內(nèi)憂外患之中的<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/特斯拉"><em>特斯拉</em></a>身上的光環(huán)似乎正在變?nèi)?。盡管存在許多挑戰(zhàn)，特斯拉自研芯片的進度卻并沒有太受影響。近日供應(yīng)鏈消息顯示，特斯拉將使用4納米制程打造其下一代自動駕駛芯片，這一訂單可能會讓特斯拉成為第七大客戶。特斯拉在自研芯片上的努力，對于其他車企來說又能學(xué)到什么？</p><p style="text-indent: 2em; text-align: left;"><strong>特斯拉的造芯之路</strong></p><p style="text-indent: 2em; text-align: left;">2021年在全球車企因缺芯大幅減產(chǎn)的時候，2021年特斯拉美國和中國的工廠開工率一直保持著9成左右，數(shù)據(jù)顯示2021年特斯拉全球交付量超過93萬，同比增長了87%。在各大車廠都因為缺芯發(fā)愁時，“特斯拉為何不缺芯”成為了各個車廠研究的課題。</p><p style="text-indent: 2em; text-align: left;">究其原因，一方面，特斯拉在新冠疫情擴大的情況下也并未下調(diào)產(chǎn)量計劃，這對其從零部件廠商手中獲得穩(wěn)定采購發(fā)揮了有益作用。另一方面，特斯拉針對缺貨的半導(dǎo)體，通過改寫軟件為這些產(chǎn)品找到了替代品，由此減少了半導(dǎo)體缺貨對生產(chǎn)帶來的影響。由此可見，掌握芯片核心技術(shù)，是特斯拉的競爭力之一。</p><p style="text-indent: 2em; text-align: left;">特斯拉的造芯之路經(jīng)歷了從買到造的過程。特斯拉的智能駕駛功能經(jīng)歷了從 Autopilot 1.0 到 Autopilot 2.0、再到 FSD（Full-Self Driving）的迭代升級，其硬件系統(tǒng)也從 Hardware 1.0 逐步升級至 Hardware 3.0。</p><p style="text-indent: 2em; text-align: left;">在 HW 1.0 時代，特斯拉采用了來自 Mobileye 的 EyeQ 系列芯片。進入 HW 2.0 時代，特斯拉找到了英偉達作為 Mobileye 的替代，采用定制版的英偉達 Drive PX2 自動駕駛計算平臺（由 1 顆 Tegra Parker 芯片和 1 顆 Pascal 架構(gòu) GPU 芯片構(gòu)成）。后來又升級為 HW 2.5，增加了一顆 Tegra Parker 芯片。但馬斯克認為無論是Mobileye還是Nvidia，都無法滿足特斯拉對于性能、研發(fā)進度、成本、功率方面的要求。自此，特斯拉走上了自研芯片之路。</p><p style="text-indent: 2em; text-align: left;">2016年，前AMD 首席架構(gòu)師Jim Keller加入特斯拉，任職Autopilot硬件工程師總裁。自此，特斯拉開啟了自研芯片之路。</p><p style="text-indent: 2em; text-align: left;"><strong>特斯拉的自研芯片</strong></p><p style="text-indent: 2em; text-align: left;">特斯拉的自研芯片F(xiàn)SD用于HW 3.0 完全自動駕駛計算平臺中。2018 年 12 月，特斯拉開始使用新的硬件和軟件堆棧對員工汽車進行改造。2019 年 3 月，特斯拉開始在其 Model S 和 Model X 汽車中批量出貨 FSD 芯片和計算機。特斯拉 Model 3 的量產(chǎn)發(fā)貨于 2019 年 4 月開始。</p><p style="text-indent: 2em; text-align: left;">FSD芯片采用三星的14納米工藝。包含 3 個四核Cortex-A72集群，總共 12 個 2.2 GHz 的 CPU，一個 1 GHz 的 Mali G71 MP12 GPU，2個2 GHz 的神經(jīng)處理單元，以及各種其他硬件加速器。FSD的圖像處理器能夠提供0.6TFLOPS計算能力，運行頻率為1GHz；2個神經(jīng)網(wǎng)絡(luò)處理器運行在2.2GHz頻率下能提供72TOPS的處理能力。</p><p style="text-indent: 2em; text-align: left;">為了提升神經(jīng)網(wǎng)絡(luò)處理器的內(nèi)存存取速度以提升計算能力，每顆FSD芯片內(nèi)部還集成了32MB高速緩存。HW 3.0的圖像處理速度提升了21倍，成本降低了20%，代價僅僅是功耗從 57w 增加到了 72w。</p><p style="text-indent: 2em; text-align: left;">安全系統(tǒng)方面FSD包含一個雙核鎖步CPU，該CPU對汽車執(zhí)行器進行最后決策，該CPU確定FSD控制器上的兩個FSD芯片生成的兩個策略是否匹配，以及是否可以安全地驅(qū)動執(zhí)行器。在相機接口方面，F(xiàn)SD芯片具有一個攝像頭串行接口，該接口能夠進行每秒高達25億像素的處理。</p><p style="text-indent: 2em; text-align: left;">在視頻編碼器方面，F(xiàn)SD芯片集成了H.265(HEVC)視頻編碼器，可用于各種應(yīng)用，例如備用攝像頭的顯示，行車記錄儀和云剪輯記錄等。在圖像信號處理器方面，F(xiàn)DS芯片集成了內(nèi)部帶有24bit流水線的信號處理器（ISP），該流水線旨在處理特斯拉汽車上配備的八個HDR傳感器，并能夠每秒處理十億像素。而且具有降噪能力。</p><p style="text-indent: 2em; text-align: left;">在神經(jīng)處理單元方面，F(xiàn)SD芯片集成了兩個定制的NPU，每個NPU都封裝了32MB的SRAM，用于存儲臨時數(shù)據(jù)，從而減少數(shù)據(jù)存入主存儲器。</p><p style="text-indent: 2em; text-align: left;">每個周期，NPU從SRAM讀取256字節(jié)的激活數(shù)據(jù)和另外128字節(jié)的權(quán)重數(shù)據(jù)到MAC陣列中。每個NPU擁有96x96 MAC，另外在精度方面，乘法為8x8bit，加法為32bit，兩種數(shù)據(jù)類型的選擇很大程度上取決于他們降功耗的努力。在2GHz的工作頻率下，每個NPU的算力為36.86TOPS，F(xiàn)SD芯片峰值算力為73.7TOPS。在點積運算之后，數(shù)據(jù)轉(zhuǎn)移到激活硬件，最后寫入緩存，以匯總結(jié)果。FSD支持許多激活功能，包括ReLU、SiLU和TanH。每個周期，將128字節(jié)的數(shù)據(jù)寫回SRAM。所有操作同時且連續(xù)地進行，重復(fù)直到完成整個計算。</p><p style="text-indent: 2em; text-align: left;">特斯拉將一些硬件簡化，雖然這會增加軟件的復(fù)雜性，但這樣可以降低芯片的成本。</p><p style="text-indent: 2em; text-align: left;">只有深入了解軟硬件之間的相互作用是什么，才能清楚到底應(yīng)該用什么樣的芯片去支持什么樣的算法。FSD芯片徹底奠定了特斯拉在自動駕駛領(lǐng)域的領(lǐng)先地位。通過自研芯片特斯拉讓硬件能與自家的軟件算法更加契合，獲得更好的兼容性和匹配度，提升產(chǎn)品核心競爭力。</p><p style="text-indent: 2em; text-align: left;">特斯拉除了在自動駕駛芯片上有成果，更是在2022年推出了Dojo處理器芯片。該芯片由臺積電制造，采用7納米制造工藝，擁有500億個晶體管，芯片面積為645mm2，小于英偉達的A100（826 mm2）和AMD Arcturus（750 mm2）。據(jù)Dojo項目負責(zé)人Ganesh Venkataramanan介紹，特斯拉Dojo是史上最快的AI訓(xùn)練計算機。相比于業(yè)內(nèi)其他芯片，同成本下性能提升4倍，同能耗下性能提高1.3倍，占用空間節(jié)省5倍。而使得Dojo完成訓(xùn)練AI算法的重任，就是特斯拉自研神經(jīng)網(wǎng)絡(luò)訓(xùn)練芯片——D1芯片。</p><p style="text-indent: 2em; text-align: left;">一家車企，不但攻克了自動駕駛芯片，還攻克了AI芯片。這樣的車企在現(xiàn)階段只有特斯拉一家，這是特斯拉在同行中芯片研發(fā)實力最好的體現(xiàn)。</p><p style="text-indent: 2em; text-align: left;">特斯拉的特別之處</p><p style="text-indent: 2em; text-align: left;">人們總把特斯拉與蘋果相提并論，特斯拉高度的定制化，是市場將特斯拉視作另一個蘋果的重要原因。與蘋果一樣，特斯拉經(jīng)歷了買芯片到完全自主研發(fā)的過程。蘋果從過去產(chǎn)品高度依賴英特爾的芯片，到現(xiàn)在M系產(chǎn)品性能完全不輸英特爾。特斯拉也是從依靠英特爾、英偉達到自研核心芯片。</p><p style="text-indent: 2em; text-align: left;">同蘋果一樣，特斯拉是的大客戶。根據(jù)預(yù)測特斯拉或?qū)⒃?022年成為第七大客戶；此外，據(jù)產(chǎn)業(yè)內(nèi)消息，特斯拉Hardware 4.0 將由代工并在美國生產(chǎn)，未來特斯拉在對于或許會更加重要。業(yè)界以特斯拉生產(chǎn)計劃預(yù)估，特斯拉明年生產(chǎn)規(guī)模將有望從300萬輛起跳。如果特斯拉最新自動駕駛芯片在 2023 年開始量產(chǎn)，并且在 2024 年開始大批量上車的話，那么特斯拉的仍然會處于全球最領(lǐng)先的水平。</p><p style="text-align:center"><img width="600" height="939" src="http://editerupload.eepw.com.cn/202301/1672803739614825.png" title="" alt=""/></p><p><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"></span>話說回來，車企造芯并不是什么新鮮事。雖然中國造車新勢力都宣稱要開啟自研自動駕駛芯片之路，但特斯拉是首先拿出成果，實現(xiàn)自動駕駛芯片量產(chǎn)的車企。還有一批車企，更多的是通過合作、投資其他公司的方式布局芯片賽道；并且他們選擇了門檻相對較低的MCU、IGBT等芯片。在沒有新的車企發(fā)布自研芯片之前，特斯拉仍將在同行中一騎絕塵。畢竟這么多年，也沒有幾個手機廠超越了蘋果。</p><p><strong>離不開中國市場的特斯拉</strong></p><p>中國市場是新能源汽車最大的市場，作為電動汽車銷量最高的車企，特斯拉離不開中國市場。為了降低成本，特斯拉也在中國投資了多個企業(yè)。特斯拉在中國山東濟南成立合資企業(yè)，注冊資本額為1.5 億美元。顯示特斯拉除了正在利用臺積電龐大的產(chǎn)能，為自己的車用與超級運算的芯片提供重要來源之外，也在車用芯片的設(shè)計上積極布局。</p><p><br/></p><p style="text-align: center;"><img width="800" height="1041" src="http://editerupload.eepw.com.cn/202301/1672803740587600.png" title="" alt=""/></p><p><br/></p><p>根據(jù)上圖，特斯拉帶動了相當(dāng)一部分中國的供應(yīng)商的業(yè)務(wù)。對于中國供應(yīng)商來說，特斯拉來了，為了跟成本更低的中國品牌競爭，肯定要大規(guī)模國產(chǎn)，這導(dǎo)致供應(yīng)鏈必然更傾向于中國本地廠商或者將原供應(yīng)商引入中國。不管怎么樣，特斯拉對應(yīng)的供應(yīng)鏈、產(chǎn)業(yè)鏈要在中國落地生根。這也就帶動了中國的新能源汽車供應(yīng)鏈。</p><p>總的來看，雖然面臨著多事之冬，特斯拉的芯片實力仍在。如果說特斯拉在芯片領(lǐng)域存在競爭，那么最大的對手并非其他車企，而是來自英偉達與高通。就在特斯拉自研芯片發(fā)布后，英偉達推出了最新的Orin 芯片，單芯片算力還是計算平臺算力達到了250TFLOP；2020 年初，高通發(fā)布了 Snapdragon Ride 自動駕駛計算平臺，其算力和能效比都碾壓了特斯拉 HW 3.0；2022年英偉達公布Thor芯片，單顆芯片算力達到2000TFLOPS，將于2025量產(chǎn)，這一芯片更是將汽車芯片算力帶到了新時代。</p><p>隨著汽車算力競賽開啟，特斯拉還能領(lǐng)先多久？或許正在推特忙碌的馬斯克，并不知道答案。</p></span>  <div class="80a0se0" id="coverDiv" class="article_reg" style="width:100%;overflow:hidden;display:none;z-index:10;position:absolute;left:0;background:#fff;"> <center> <img src="https://webstorage.eepw.com.cn/images/display/reg.jpg" border="0" usemap="#Map" /> <map name="Map" id="Map"> <area shape="rect" coords="133,235,319,253" 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