TMS320F2812: 正常运行时，EMU1电平变化导致DSP挂起

这个引脚在datasheet上有这样说明：

Emulator pin 1. When TRST is driven high, this pin is used as an interrupt to or from the emulator system and is defined as input/output through the JTAG scan. This pin is also used to put the device into boundary-scan mode. With the EMU0 pin at a logic-high state and the EMU1 pin at a logic-low state, a rising edge on the TRST pin would latch the device into boundary-scan mode. NOTE: An external pullup resistor is recommended on this pin. The value of this resistor should be based on the drive strength of the debugger pods applicable to the design. A 2.2-kΩ to 4.7-kΩ resistor is generally adequate. Since this is application-specific, it is recommended that each target board be validated for proper operation of the debugger and the application.

你的板子上这个引脚有接上拉电阻吗？

EMU0和EMU1都接的10k上拉,在2812运行过程中EMU0接地没问题,EMU1接地就挂起

额，是不是接太高了。。。手册上要求的是2.2-kΩ ~ 4.7-kΩ。。。

感觉这个影响不大吧,我今天查了查,EMU0在逻辑高电平,EMU1在逻辑低电平,且TRST出现上升沿的时候,会进入边界扫描模式,我感觉可能是这个问题.

这又有新的问题了:在DSP"挂起"(现在看可能不是挂起?)后,还能输出PWM信号,只是占空比不再更新,串口数据不再收发,请问进入边界扫描模式后,DSP的程序还在运行么?哪些模块还会正常工作呀?