{"id":258446,"date":"2024-10-19T17:06:35","date_gmt":"2024-10-19T17:06:35","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-20794-42020\/"},"modified":"2024-10-25T12:44:04","modified_gmt":"2024-10-25T12:44:04","slug":"bs-iso-20794-42020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-20794-42020\/","title":{"rendered":"BS ISO 20794-4:2020"},"content":{"rendered":"<p>This document specifies the CXPI data link layer and the CXPI physical layer.<\/p>\n<p>The DLL is based on:<\/p>\n<ul>\n<li>\n<p>priority-based CXPI network access;<\/p>\n<\/li>\n<li>\n<p>non-destructive content-based arbitration;<\/p>\n<\/li>\n<li>\n<p>broadcast frame transfer and acceptance filtering; and<\/p>\n<\/li>\n<li>\n<p>node related error detection and error signalling.<\/p>\n<\/li>\n<\/ul>\n<p>The CXPI physical layer (PHY) requirements comprise of:<\/p>\n<ul>\n<li>\n<p>physical signalling (PS) sub-layer, which specifies the requirements of the clock generation function, the encoding and decoding of CXPI frames, and bit-wise collision resolution logic;<\/p>\n<\/li>\n<li>\n<p>physical media attachment (PMA) sub-layer, which specifies the requirements of the signal shaping waveform logic;<\/p>\n<\/li>\n<li>\n<p>physical media dependent (PMD) sub-layer, which specifies the requirements of the CXPI network termination, electrostatic discharge protection, etc., and device connector requirements; and<\/p>\n<\/li>\n<li>\n<p>physical media (PM), which specifies the requirements of the CXPI network cable\/wiring harness.<\/p>\n<\/li>\n<\/ul>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>undefined  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>8<b><\/td>\n<td>Introduction  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>4 Symbols and abbreviated terms <br \/> 4.1 Symbols  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>4.2 Abbreviated terms  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>5 Conventions  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>6 Introduction to data link layer and physical layer <br \/> 6.1 Frames <br \/> 6.2 Frame collision avoidance <br \/> 6.3 Error detection and indication <br \/> 6.4 Clock transmission and detection <br \/> 7 Service interface parameters (SIP) <br \/> 7.1 SIP \u2014 General <br \/> 7.2 SIP \u2014 Data type definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>7.3 SIP \u2014 Ftype, frame type <br \/> 7.4 SIP \u2014 ReqId, request identifier <br \/> 7.5 SIP \u2014 ReqTypeId, request type identifier <br \/> 7.6 SIP \u2014 PDU, protocol data unit  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>7.7 SIP \u2014 Length, length of PDU <br \/> 7.8 SIP \u2014 ev_wakeup_ind, event wake-up indication (optional) <br \/> 7.9 SIP \u2014 cmd_wakeup_req, command wake-up request  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>7.10 SIP \u2014 NMInfo, network management information <br \/> 7.11 SIP \u2014 SCT, sequence count <br \/> 7.12 SIP \u2014 Result, result <br \/> 8 Data link layer (DLL) <br \/> 8.1 SI \u2014 L_Data.req and L_Data.ind service interface  <\/td>\n<\/tr>\n<tr>\n<td><b>19<b><\/td>\n<td>8.2 SI \u2014 L_Data.req and L_Data.ind service interface parameter mapping  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>8.3 DLL \u2014 Service interface with L_Ftype parameter mapping <br \/> 8.3.1 DLL \u2014 L_Data.req and L_Data.ind with L_Ftype = NormalCom (L_Length = NULL)  <\/td>\n<\/tr>\n<tr>\n<td><b>21<b><\/td>\n<td>8.3.2 DLL \u2014 L_Data.req and L_Data.ind with L_Ftype = NormalCom (L_Length \u2265 0016)  <\/td>\n<\/tr>\n<tr>\n<td><b>22<b><\/td>\n<td>8.3.3 DLL \u2014 L_Data.req and L_Data.ind interface with L_Ftype = DiagNodeCfg  <\/td>\n<\/tr>\n<tr>\n<td><b>23<b><\/td>\n<td>8.4 DLL \u2014 Frame fields <br \/> 8.4.1 DLL \u2014 Frame field definition  <\/td>\n<\/tr>\n<tr>\n<td><b>24<b><\/td>\n<td>8.4.2 DLL \u2014 Request type identifier and request identifier fields  <\/td>\n<\/tr>\n<tr>\n<td><b>25<b><\/td>\n<td>8.4.3 DLL \u2014 L_FI (frame information) field  <\/td>\n<\/tr>\n<tr>\n<td><b>26<b><\/td>\n<td>8.4.4 DLL \u2014 L_DATA (data field)  <\/td>\n<\/tr>\n<tr>\n<td><b>27<b><\/td>\n<td>8.4.5 DLL \u2014 L_CRC field  <\/td>\n<\/tr>\n<tr>\n<td><b>29<b><\/td>\n<td>8.5 DLL \u2014 Internal operation  <\/td>\n<\/tr>\n<tr>\n<td><b>30<b><\/td>\n<td>8.6 DLL \u2014 Timing parameters <br \/> 8.6.1 DLL \u2014 IBS timing handling <br \/> 8.6.2 DLL \u2014 IFS timing handling  <\/td>\n<\/tr>\n<tr>\n<td><b>31<b><\/td>\n<td>8.6.3 DLL \u2014 Beginning condition of frame  <\/td>\n<\/tr>\n<tr>\n<td><b>32<b><\/td>\n<td>8.6.4 DLL \u2014 Start of frame <br \/> 8.6.5 DLL \u2014 Frame transmission time  <\/td>\n<\/tr>\n<tr>\n<td><b>33<b><\/td>\n<td>8.7 DLL \u2014 Completion of frame <br \/> 8.7.1 DLL \u2014 General <br \/> 8.7.2 DLL \u2014 Completing condition of L_PTYPE field <br \/> 8.7.3 DLL \u2014 Completing condition of L_PID field  <\/td>\n<\/tr>\n<tr>\n<td><b>34<b><\/td>\n<td>8.7.4 DLL \u2014 Completing condition of frame <br \/> 8.8 DLL \u2014 Byte arbitration <br \/> 8.9 DLL \u2014 Function models <br \/> 8.9.1 DLL \u2014 Transmission logic  <\/td>\n<\/tr>\n<tr>\n<td><b>35<b><\/td>\n<td>8.9.2 DLL \u2014 Reception logic  <\/td>\n<\/tr>\n<tr>\n<td><b>36<b><\/td>\n<td>8.10 DLL \u2014 Error detection <br \/> 8.10.1 DLL \u2014 General <br \/> 8.10.2 DLL \u2014 Byte error (Err_DLL_Byte)  <\/td>\n<\/tr>\n<tr>\n<td><b>37<b><\/td>\n<td>8.10.3 DLL \u2014 CRC error (Err_DLL_CRC) <br \/> 8.10.4 DLL \u2014 Parity error (Err_DLL_Parity) <br \/> 8.10.5 DLL \u2014 Data length code error (Err_DLL_DLC) <br \/> 8.10.6 DLL \u2014 Data length code extension error (Err_DLL_DLCext)  <\/td>\n<\/tr>\n<tr>\n<td><b>38<b><\/td>\n<td>8.10.7 DLL \u2014 Framing error (Err_DLL_Framing) <br \/> 8.10.8 DLL \u2014 Exception handling for L_FI_DLC = &#8216;11112&#8217; detection <br \/> 9 Physical layer (PHY) <br \/> 9.1 PHY \u2014 Overview  <\/td>\n<\/tr>\n<tr>\n<td><b>39<b><\/td>\n<td>9.2 PHY \u2014 Concept of waveform generation  <\/td>\n<\/tr>\n<tr>\n<td><b>40<b><\/td>\n<td>9.3 PHY \u2014 Physical signalling (PS) requirements <br \/> 9.3.1 PHY \u2014 PS general  <\/td>\n<\/tr>\n<tr>\n<td><b>41<b><\/td>\n<td>9.3.2 PHY \u2014 PS physical interface configuration <br \/> 9.3.3 PHY \u2014 PS bit rate <br \/> 9.3.4 PHY \u2014 PS bit sample timing  <\/td>\n<\/tr>\n<tr>\n<td><b>42<b><\/td>\n<td>9.3.5 PHY \u2014 PS encoding and decoding logic  <\/td>\n<\/tr>\n<tr>\n<td><b>45<b><\/td>\n<td>9.3.6 PHY \u2014 PS clock generation  <\/td>\n<\/tr>\n<tr>\n<td><b>46<b><\/td>\n<td>9.3.7 PHY \u2014 PS node clock synchronization and bit synchronization <br \/> 9.3.8 PHY \u2014 PS detection of clock existence  <\/td>\n<\/tr>\n<tr>\n<td><b>47<b><\/td>\n<td>9.3.9 PHY \u2014 PS bit-wise collision resolution <br \/> 9.3.10 PHY \u2014 PS AC parameters  <\/td>\n<\/tr>\n<tr>\n<td><b>48<b><\/td>\n<td>9.3.11 PHY \u2014 PS node transmission of wake-up pulse  <\/td>\n<\/tr>\n<tr>\n<td><b>49<b><\/td>\n<td>9.4 PHY \u2014 Physical medium attachment (PMA) requirements <br \/> 9.4.1 PHY \u2014 PMA general  <\/td>\n<\/tr>\n<tr>\n<td><b>50<b><\/td>\n<td>9.4.2 PHY \u2014 PMA electrical parameters  <\/td>\n<\/tr>\n<tr>\n<td><b>52<b><\/td>\n<td>9.4.3 PHY \u2014 PMA AC parameters  <\/td>\n<\/tr>\n<tr>\n<td><b>60<b><\/td>\n<td>9.4.4 PHY \u2014 PMA wake-up pulse and dominant pulse filter time  <\/td>\n<\/tr>\n<tr>\n<td><b>63<b><\/td>\n<td>9.5 PHY \u2014 Physical media dependent (PMD) sub-layer requirements <br \/> 9.5.1 PHY \u2014 PMD entity requirements <br \/> 9.5.2 PHY \u2014 PMD device interface requirements  <\/td>\n<\/tr>\n<tr>\n<td><b>64<b><\/td>\n<td>9.6 PHY \u2014 Physical media (PM) sub-layer requirements <br \/> 9.7 PHY \u2014 Control and event services <br \/> 9.7.1 PHY \u2014 Control and event service interface  <\/td>\n<\/tr>\n<tr>\n<td><b>65<b><\/td>\n<td>9.7.2 PHY \u2014 Wake-up request <br \/> 9.7.3 PHY \u2014 Wake-up event  <\/td>\n<\/tr>\n<tr>\n<td><b>66<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Road vehicles. Clock extension peripheral interface (CXPI) &#8211; Data link layer and physical layer<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2020<\/td>\n<td>70<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":258448,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[742,2641],"product_tag":[],"class_list":{"0":"post-258446","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-43-040-15","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/258446","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/258448"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=258446"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=258446"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=258446"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}