仿真时出现了状况，求解 settings, Trouble, address, package, memory

reporter

仿真的时候出现
C55xx: Trouble Halting Target CPU: (Error -2130 @ 0x400) Unable to access device memory. Verify that the memory address is in valid memory. If error persists, confirm configuration, power-cycle board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 5.0.747.0)
什么情况呢？