DSP28346上电

DSP手册（Power Sequencing）有如下描述:

In any configuration, all the rails should ramp up within tpup (5 ms, typical) to allow early stability of clocks and IOs.

自己顶下

手动操作完成，核心电压到外设电压延时估计得有数秒，

数据手册的6.9 Power Sequencing对上电顺序及其原因有说明，是为了保证芯片正常复位。

手动操作不知是否有保证两个电压上电间隔以确保不会烧坏芯片。有参考设计：controlCARDs\CC2834xHWdevPkg

No special requirements are placed on the power up/down sequence of the various power pins to ensure
the correct reset state for all the modules. However, if the 3.3-V transistors in the level shifting output
buffers of the I/O pins are powered prior to the 1.1-V/1.2-V transistors, it is possible for the output buffers
to turn on, causing a glitch to occur on the pin during power up. To avoid this behavior, power the
VDD pins prior to or simultaneously with the VDDIO pins, ensuring that the VDD pins have reached 0.7-V
before the VDDIO pins reach 0.7 V. The 1.8-V rail for the PLL and oscillator logic can be powered up along
with VDD/VDDIO rails. The 1.8-V rail must be powered even if the PLL is not used. It should never be left
unpowered. In any configuration, all the rails should ramp up within tpup (5 ms, typical) to allow early
stability of clocks and IOs.

谢谢，不知道其他人有没操作经验

上电顺序会导致的问题：

1.上电瞬间功耗增大

2.导致加载不能完成，启动失败

但不至于损坏，我建议你全部一起上，别手动控制上电顺序

上电顺序会导致的问题：

1.上电瞬间功耗增大

2.导致加载不能完成，启动失败

但不至于损坏，我建议你全部一起上，别手动控制上电顺序

@mangui zhang，好的，谢谢

@mangui zhang,不过手册上的上电时序有如下描述：

To avoid this behavior, power the VDD pins prior to or simultaneously with the VDDIO pins, ensuring that the VDD pins have reached 0.7-V
before the VDDIO pins reach 0.7 V.

即核心电压1.2V优先于3.3V上电