http://vmcc.vicp.net:9090/wiki/ 2026-04-18T01:15:56+00:00 http://vmcc.vicp.net:9090/wiki/ http://vmcc.vicp.net:9090/wiki/lib/tpl/dokuwiki/images/favicon.ico text/html 2025-04-29T10:55:49+00:00 Anonymous (anonymous@undisclosed.example.com) http://vmcc.vicp.net:9090/wiki/doku.php?id=%E5%8D%8F%E8%AE%AE%E5%AD%A6%E4%B9%A0:amba:apb&rev=1745895349&do=diff apb apb读写传输分为地址阶段和数据阶段。 penable拉高，表示数据阶段开始。 1. apb 1.0 这个是最早的apb版本， 是固定2个cycle完成读写操作。 2. apb 2.0 这个是升级版本，数据阶段可以支持no ready wait text/html 2024-12-26T10:32:37+00:00 Anonymous (anonymous@undisclosed.example.com) http://vmcc.vicp.net:9090/wiki/doku.php?id=%E5%8D%8F%E8%AE%AE%E5%AD%A6%E4%B9%A0:amba:axi3&rev=1735180357&do=diff AXI3 1. Burst len (AWLEN ARLEN) ARLEN/AWLEN Number of data transfers b0000 1 b0001 2 b0010 3 b0011 4 b0100 5 b0101 6 text/html 2024-12-26T10:32:27+00:00 Anonymous (anonymous@undisclosed.example.com) http://vmcc.vicp.net:9090/wiki/doku.php?id=%E5%8D%8F%E8%AE%AE%E5%AD%A6%E4%B9%A0:amba:axi4_lite&rev=1735180347&do=diff axi4-lite AXI4 signals not supported in AXI4-Lite The AXI4-Lite interface does not support the following signals: AWLEN, ARLEN The burst length is defined to be 1, equivalent to an AxLEN value of zero. AWSIZE, ARSIZE All accesses are defined to be the width of the data bus. Note AXI4-Lite requires a fixed data bus width of either 32-bit or 64-bit. AWBURST, ARBURST The burst type has no meaning because the burst length is 1. AWLOCK, ARLOCK All accesses are defined as Normal accesses, e…