TI中文支持网最近在做UCD3138的一个项目，想对芯片进行加密处理，但是看了手册，貌似只有i/o等物理检测后的flash擦除操作。
请问UCD系列芯片有无类似单片机的熔断机制 或者 DSP的写密码区操作？
Wu JW：
The UCD doesn't have any hardware support for encryption.Presumably you could implement various encryption algorithms in the UCD, but we haven't done so atTI that I know of.
There is a capability to protect the installed object code.The secret is to not enable the JTAG, and to disable the memory debugger support for flash, and probably for RAM as well, just in case the code is hackable that way.Also, instead of offering a command for checksum clear to return to ROM Mode, use a flash erase in production code.At reset, the JTAG is disabled by remapping a JTAG pin using the IOMUX.
