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使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="spi-d4445e6962" class="topicref" data-id="spi" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action spi-d4445e6962-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/spi/spi_user_guide.html" id="spi-d4445e6962-link">SPI 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d4445e7075" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d4445e7075-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/psadc/psadc_user_guide.html" id="id-d4445e7075-link">PSADC 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="uart_user_guide-d4445e7215" class="topicref" data-id="uart_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action uart_user_guide-d4445e7215-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/uart/uart_user_guide.html" id="uart_user_guide-d4445e7215-link">UART 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_user_guide-d4445e7299" class="topicref" data-id="usb_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_user_guide-d4445e7299-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb_user_guide.html" id="usb_user_guide-d4445e7299-link">USB 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d4445e7944" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d4445e7944-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d4445e7944-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/pbus/pbus-user-guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">PBUS 使用指南</h1>
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<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div>
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<div class="- topic/body concept/conbody body conbody">
|
||
<p class="- topic/p p" data-ofbid="d209395e33__20250123155224">Parallel
|
||
Bus (PBUS) 模块功能主要实现了一组外部并行总线，可与外部
|
||
FPGA 和
|
||
SRAM
|
||
等元器件实现连接和高效通信，提高系统的灵活性和扩展性。此外，PBUS
|
||
模块支持 AHB
|
||
总线访问配置寄存器和外部设备，从而有效管理和控制与之相连的外部设备，确保数据的顺畅传输。通过合理的寄存器配置和使用约定的映射地址空间，PBUS
|
||
模块可提供更多的操作灵活性并提高系统性能。</p>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="pbus_user_guide__table_rn4_vcs_21c" data-ofbid="pbus_user_guide__table_rn4_vcs_21c" data-cols="3"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">术语定义</span></caption><colgroup><col style="width:33.33333333333333%"/><col style="width:33.33333333333333%"/><col style="width:33.33333333333333%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
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<th class="- topic/entry entry colsep-1 rowsep-1" id="pbus_user_guide__table_rn4_vcs_21c__entry__1">术语</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="pbus_user_guide__table_rn4_vcs_21c__entry__2">定义</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="pbus_user_guide__table_rn4_vcs_21c__entry__3">注释说明</th>
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</tr>
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</thead><tbody class="- topic/tbody tbody">
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<tr class="- topic/row">
|
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="pbus_user_guide__table_rn4_vcs_21c__entry__1">PBus</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="pbus_user_guide__table_rn4_vcs_21c__entry__2">Parallel Bus</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="pbus_user_guide__table_rn4_vcs_21c__entry__3">并行总线</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="pbus_user_guide__table_rn4_vcs_21c__entry__1">AHB</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="pbus_user_guide__table_rn4_vcs_21c__entry__2">Advanced High performance Bus</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="pbus_user_guide__table_rn4_vcs_21c__entry__3">（高速）系统总线</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="pbus_user_guide__table_rn4_vcs_21c__entry__1">APB</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="pbus_user_guide__table_rn4_vcs_21c__entry__2">Advanced Peripheral Bus</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="pbus_user_guide__table_rn4_vcs_21c__entry__3">外设/外围总线</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="pbus_user_guide__table_rn4_vcs_21c__entry__1">DMA</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="pbus_user_guide__table_rn4_vcs_21c__entry__2">Direct Memory Access</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="pbus_user_guide__table_rn4_vcs_21c__entry__3">直接存储器访问</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="- topic/p p" data-ofbid="d209395e117__20250123155224">PBus 模块支持的特性有：<ul class="- topic/ul ul" id="pbus_user_guide__ul_gkf_tds_21c" data-ofbid="pbus_user_guide__ul_gkf_tds_21c">
|
||
<li class="- topic/li li" data-ofbid="d209395e121__20250123155224">
|
||
<p class="- topic/p p" data-ofbid="d209395e123__20250123155224">支持 AHB 总线访问配置寄存器和外部设备地址空间</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d209395e127__20250123155224">
|
||
<p class="- topic/p p" data-ofbid="d209395e133__20250123155224">AHB 与 PBUS 仅支持 Single 操作，不支持 Burst 操作</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d209395e141__20250123155224">
|
||
<p class="- topic/p p" data-ofbid="d209395e143__20250123155224">16-bit 地址和数据总线复用</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d209395e147__20250123155224">
|
||
<p class="- topic/p p" data-ofbid="d209395e149__20250123155224">外部设备地址空间为 64 KB</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d209395e153__20250123155224">
|
||
<p class="- topic/p p" data-ofbid="d209395e155__20250123155224">每笔操作可实现 16 bit 数据读/
|
||
写</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d209395e160__20250123155224">
|
||
<p class="- topic/p p" data-ofbid="d209395e162__20250123155224">可灵活配置 NCS/ NADV/ NWE/ NOE/ AD 信号时序</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d209395e166__20250123155224">
|
||
<p class="- topic/p p" data-ofbid="d209395e168__20250123155224">可支持 DMA 对外部设备地址空间进行读写访问</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d209395e172__20250123155224">支持两路片选信号 CS0/1</li>
|
||
|
||
<li class="- topic/li li" data-ofbid="d209395e183__20250123155224">支持最大 16 bit 独立地址线</li>
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</ul></div>
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