Part Number:TMS320DM642
TMS320DM642AGNZ 连接仿真器时出现不能连接的情况,连接不上仿真器。当先加核心电压1.4V,再后加3.3V的IO电压,连接仿真器正常,也能正常的烧写flash。当同时加1.4V和3.3V时,仿真器就是连接不上。请问是什么原因?
Nancy Wang:
请看一下手册上电要求。
5.3.1 Power-Supply Sequencing
TI DSPs do not require specific power sequencing between the core supply and the I/O supply. However, systems should be designed to ensure that neither supply is powered up for extended periods of time (>1 second) if the other supply is below the proper operating voltage.
https://www.ti.com.cn/cn/lit/ds/symlink/tms320dm642.pdf
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user5076681:
你好,数据手册我看了,这段关于上电顺序的话我也看了。但是目前遇到的情况是先上内核1.4V电压,再上3.3VIO电压就正常,同时上电有的能正常有的片子不正常。先上3.3VIO电压肯定不正常。请问怎么回事,谢谢。