LX2080

[YY2410]

My processor is LX2080. When using (SDHC2) EMMC for booting, in both cases, it can be loaded via EMMC. At this time, a Codewarrior emulator must be connected:
After powering on, the EMMC can only start up after the processor is connected through the emulator. At this time, the emulator can also be connected to the CPU.
2. When the power is turned on, the simulator forcibly pulls the output low and then releases it. At this point, the system can be started via EMMC.
The connection failure situation is as follows:
The emulator is not connected or the USB interface of the emulator is not connected (even after the aforementioned reset, the device still cannot be started)

Could you please tell me what the problem is and how to solve it?

thanks!

我处理器是LX2080，使用(SDHC2)EMMC启动时，在两种情况下，可以通过EMMC加载，此时必须连接codewarrior仿真器：

1. 上电后通过仿真器连接一下处理器后EMMC才能启动，此时仿真器同样可以连接到CPU；

2. 上电时仿真器复位输出强行拉低，然后释放，此时可以通过EMMC启动。

连接不上情况如下：

1.未连接仿真器或仿真器USB接口未连接（通过上述复位也无法启动）

麻烦问下这个是什么问题？怎么解决？

谢谢！

[June_Lu]

如果是上次的eMMC问题已经解决了，板卡可以启动了，但仿真器影响eMMC启动，可以判断一下，连接仿真器影响的是PORESET_n还是上电启动。

是否上电复位时，有些信号还没有准备好，造成无法启动？

连接仿真器，是否PORESET_n的输入源信号差异，造成的影响。

仿真器的设计请参考

AN5407_Layerscape LX2160A and LX2162A Design Checklist

Figure 36. JTAG interface connection

如果板卡已经启动起来了，状态符合LX2160A Reference Manual, Table 11. Power-On Reset Sequence，stage24，

如是eMMC有数据，可以看一下RESET_REQ信号是否正常