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我用的dsp是2407，可以下载到外部ram在线运行，但是现在不能烧写到内部flash里面了，错误是：Read status value 0x0001 from symbol PRG-status Flash algorithm during clear operration.请问是什么原因造成的，是dsp坏了？还是烧写工具有问题？还是要重装ccs？谢谢！
Jones Chen：
是DSP损坏了。 请按照下面的提示进行flash的烧写操作。
Note: All input pin buffers used in LF240xA are not 5-V compatible. Input voltage of all GPIO and ADC should be in range between -0.3V and +4.6V, otherwise may cause permanent damage to the device. The checklist and tips are based on CCS2.21 with flash plug-in tools v1.12.5, CCS3.1 with flash plug-in tools v1.13.0 and SDFlash v1.63 with flash algorithm v26-Oct-2005.
1.1. Is the Vccp pin directly connected to +5V (Do not use any current-limiting resistor in series with the +5V supply on Vccp pin.)? Is the +5V power supply’s output current greater than 500mA current output ability, and output voltage in range between +4.75V and +5.25V? Is +3.3V output voltage for Vdd and Vcca in range between +3.0V and +3.6V?
确认DSP的Vccp脚直接连接到＋5V的电源（不要在＋5V电源的输出到DSP的Vccp脚间加任何限流电阻），请确认＋5电源的电流输出能力大于500毫安，电压输出精度为5%，即电压输出在+4.75~5.25的范围内。请确认＋3.3电源的电流输出能力大于250毫安，电压输出精度为10%，即电压输出在+3.0V~+3.6V的范围内。并满足VCP(5V)的精度在+/-5%以内，且VDD(3.3V)先于VCCP(5V)上电。（如下附图）
Note:a. The Flash cannot be programmed if Vccp pin is connected to GND.
b. When not programming the Flash (i.e., during normal device operation), Vccp should be tied to GND. Vccp pin must not be left floating at any time.
c. Do not use any current-limiting resistor in series with the 5-V supply on Vccp pin.
注意！a. 如果Vccp脚被连接到地(GND), 片上闪存将不能被擦写。
b. 建议Vccp应该被连接到地(GND)当闪存不被擦写时（例如正常运行时）。任何时候Vccp不能悬空，必须连接到+5V或地(GND)。（如下附图）
c. 不要在+5V与Vccp脚之间加任何阻值的限流电阻。
