TI中文支持网现在遇到一个问题，之前买的CC2460R2开发套件由于不能进行多设备定位，故买了几片2642R1F的芯片替换开发板上的2640R2F芯片，当然晶振从24MHz换为了48MHz。现在遇到个问题，下载的时候报错，不能下载。ccs版本为最新的10.1版本。
然后我用用smartRF Flash Programmer 2 Ver.1.8.1版本进行flash烧录也提示失败。擦除flash是ok的，就是烧录程序的时候报错：Failed to read last page.
具体报错如下：
Cortex_M4_0: Error: (Error -1170 @ 0x0) Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.2.0.00002)
Cortex_M4_0: Trouble Halting Target CPU: (Error -2064 @ 0x0) Unable to read device status. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.2.0.00002)
Cortex_M4_0: Error: (Error -1170 @ 0x0) Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.2.0.00002)
Cortex_M4_0: Trouble Halting Target CPU: (Error -2064 @ 0x0) Unable to read device status. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.2.0.00002)
Cortex_M4_0: Error: (Error -1170 @ 0x0) Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.2.0.00002)
Cortex_M4_0: Trouble Halting Target CPU: (Error -2064 @ 0x0) Unable to read device status. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.2.0.00002)
Cortex_M4_0: Error: (Error -1170 @ 0x0) Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.2.0.00002)
Cortex_M4_0: Trouble Halting Target CPU: (Error -2064 @ 0x0) Unable to read device status. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.2.0.00002)
YiKai Chen：
看來是替換芯片出了問題，你可能要重來一次試試
long：
回复 YiKai Chen:
芯片重新试过很多次了，一直是这个问题，可以确保芯片焊接没问题的
YiKai Chen：
回复 long:
我指的是換開發板重上芯片
long：
回复 YiKai Chen:
开发板也换过几个，另外用uniflash自动连接开发板，提示的还是CC2640R2开发板，并不是CC2642，同时用uniflash下载程序也失败。 如果手动选择CC2642R1芯片就能下载进去。
YiKai Chen：
回复 long:
為什麼不直接買LAUNCHXL-CC26X2R1?
long：
回复 YiKai Chen:
年前买了8片LAUNCHXL-CC2640R2的套件包括2个AOA板，用来做AOA定位，但是不支持多设备连接，所以现在只能换2642的芯片了，再换套件那成本太高了。
YiKai Chen：
回复 long:
你繼續換下去到時候還是要換板子、又多浪費時間
long：
回复 YiKai Chen:
如果在开发套件上确认好了功能就自己打板设计硬件了啊
long：
回复 YiKai Chen:
现在手上有8块官方 的开发板不可能全部不用了啊，2642和2640是pin to pin的，只要替换了不就可以用了嘛
YiKai Chen：
回复 long:
替換芯片本來就不容易、幫不上忙
