先楫官方工程师干货：HPM6000电源管理系统功能和特性、功耗实测
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<p><strong>作者：先楫应用工程师全立</strong><br />
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<section style="white-space:normal; box-sizing:border-box">本文介绍了HPM6000电源管理系统功能和特性，低功耗管理系统的功能和特性，低功耗应用开发的示例，最后基于HPM6300EVK开发板测试验证了HPM6300 MCU在各个电源模式下的功耗指标，方便用户快速评估和上手低功耗相关的应用开发。感兴趣的快来看看吧！</section>
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<p ><strong style="box-sizing:border-box">低功耗管理</strong></p>
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<p >HPM6000系列支持多种功耗模式，本节以HPM6700系列为例，介绍其模式，它们的功耗水平从高到低和唤醒时间从短到长依次为： </p>
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<section style="white-space:normal; box-sizing:border-box"><strong>运行模式 (RUN) ：</strong>运行模式下CPU正常执行指令，所有必要的功能模块正常工作。可关闭不需要的功能模块，CPU时钟频率和供电电压可用软件调节。CPU1作为从核，在配置之后，CPU1随后会从入口地址开始运行程序。</section>
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<section style="white-space:normal; box-sizing:border-box"><strong>等待模式 (WAIT) ：</strong>等待模式下CPU核心时钟因 WFI 指令触发而关闭，其他功能模块保持运行模式下的状态，出现中断时CPU能够立即恢复运行并处理中断。 </section>
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<section style="white-space:normal; box-sizing:border-box"><strong>停止模式 (STOP) ：</strong>停止模式由CPU的WFI指令触发，通过预先配置，系统电源域内各子系统和模块，包括 CPU 自身的电源能够在SYSCTL模块的控制下灵活关闭或保持，其中PLL和24M晶振也可以根据需要关闭或保持。</section>
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<section style="white-space:normal; box-sizing:border-box"><strong>休眠模式 (STANDBY) ：</strong> 休眠模式下整个系统电源域都处于复位或掉电状态，DCDC可随之关闭或者进入低功耗模式，可以根据应用设置一个较低的电压。该模式可以由 CPU 的 WFI 指令触发，也可以通过软件操作触发。 </section>
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<section style="white-space:normal; box-sizing:border-box"><strong>关机模式 (SHUTDOWN) ：</strong>关机模式下电源管理域和系统电源域都处于复位或掉电状态，仅保留电池备份域工作，该模式可以通过软件操作触发，也可以通过引脚信号触发。</section>
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<p>在HPM6300系列中，也是拥有相同的低功耗模式，并且与HPM6700系列中低功耗模式中的行为和表现是基本一致的，唯一的区别是系统电源域中，HPM6300系列的系统电源域内只包含一个CPU0。</p>
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<p><strong>功耗实测</strong></p>
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<section ><strong><em>（本章节使用HPM6300EVK测试验证）</em></strong></section>
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<p >本节对不同低功耗模式下的功耗进行实测，例如在主频为480Mhz，总线频率在160Mhz的运行模式下，测试三种电流相加仅为42.5mA左右，那么运行模式下动态功耗小于87uA/Mhz,。而在关机模式下测得VBAT电流仅有1.4uA。</p>
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<section style="white-space:normal; box-sizing:border-box"><strong>测试结果：</strong></section>
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<section>*注：VPMC是指电源管理域，电源管理域内的外设有通用定时器（PTMR），电源域内的看门狗(PWDG)，电源管理域内的通用异步收发器(PUART), 电源管理域 GPIO 控制器(PGPIO)等。本次测试中使用PGPIO唤醒，其余外设未开启。</section>
<section>VBAT是指电池备份域，电池备份域内的外设有实时时钟（RTC）,电池备份域GPIO控制器（BGPIO）,侵入检测模块(TAMP)等。本次测试中使用BGPIO唤醒，32k晶振开启，其余外设未开启。</section>
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<p><strong>唤醒实测</strong></p>
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<p >使用HPM6300EVK测试验证，在等待，停止，休眠模式中，发送字符触发中断唤醒。在关机模式中，通过按键触发中断唤醒。</p>
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<section >测试结果：</section>
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<section >A.<strong style=" letter-spacing:1px">等待模式</strong><strong style=" letter-spacing:1px"> WAIT</strong></section>
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<section >配置从GPIO起中断，通过PGPIO模块的中断唤醒，设定中断触发条件并使能中断。C1为PC12的信号，C2为PY07的信号。</section>
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<section >B.停止模式 STOP</section>
<section > 配置从GPIO起中断，通过PGPIO模块的中断唤醒，设定中断触发条件并使能中断。C1为PC12的信号，C2为PY07的信号。</section>
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<section >C.休眠模式 STANDBY</section>
<section >C1为PC12的信号，C2为PY07的信号。本次测试将PC12拉高的配置放入main函数的开头：gpio_set_pin_output_with_initial(HPM_GPIO0, GPIO_DI_GPIOC, 12, 1);并配置好相应时钟。</section>
<p>（*图中X2黄线处有发送字符后触发的下降沿，由于当前截图为5ms/div，因此显示得较细。）</p>
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<section >D.关机模式 SHUTDOWN</section>
<section >因为关机模式下系统只能从电池备份域唤醒，所以需在 BPOR中SELECT位域寄存器中使能唤醒源：GPIO，可以允许使用BGPIO来自动开机。随后将PZ02配置为GPIO，并配置BGPIO的中断。这样轻按一下PZ02便可以唤醒。下图中C1为PC12的信号，C2为PZ02的信号。</section>
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<p ><strong style="box-sizing:border-box">总结</strong></p>
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<p >本文介绍HPM6000电源管理的功能特性及低功耗模式的功能特性。HPM6000支持4种低功耗模式，从本次HPM6300的实际测试结果来看，在关机模式下VBAT电流仅有1.4uA且唤醒时长最短可达19毫秒，性能指标是非常的强悍，极大的满足了用户低功耗应用的各种场景。</p>
<p>低功耗与主频有关</p>
<p>主频480Mhz，总线频率在160Mhz，电流相加仅为42.5mA左右，动态功耗小于87uA/Mhz，关机模式VBAT电流仅有1.4uA</p>
<p>厉害</p>
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<p>我的HPM6750的DCDC没有输出，不知道原因，求助，22067776@qq.com </p>
locust_boom88 发表于 2024-12-28 20:55
我的HPM6750的DCDC没有输出，不知道原因，求助，22067776@qq.com
<p>直接发一个求助的帖子，说明具体现象、相关电路、相关代码，这样坛子里相关玩过这款单片机的网友，就可以帮你瞅瞅了</p>
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