Is CC2540 different with CC2541 on the RTC part？

Based on the BLE-CC254x-1.4.0 SimpleBLEPeripheral application:

a. Config xPOWR_SAVING

b. Config xCC2540_MINIDK

c. Use osal_getClock() to get the RTC time

As a result:

a. Tested on CC2540, the clock looses about one second a minute or one minute a hour

b. Tested on CC2541, the clock is accurate

Is CC2540 different with CC2541 on the RTC part? Any solution? Thanks!

Hi Hansong, 

not so sure about your question. 

but anyway, you can consider the two chips are the same, expect of the communication interface, I2C or USB. 

AZ,

目前我已经把问题反馈出来，另外两个朋友也测到了同样的问题，如果有时间的话，可否帮忙先简单验证一下？

因为我们只是基于TI标准的SimpleBLEPeripheral进行简单的修改，基本上可以确定要么是固件库的BUG，要么是芯片的差异。

可是这些部分，我们都无法进一步往下查，只能期待TI的协助了，谢谢！

PS:

CC2541比较精准而CC2540会慢，同样的配置、同样的程序和同样的板子只是更换芯片而已

附件是我这边稍作修改的程序，用LightBlue读取CHAR5就好，大约半个小时就可以看出问题了

Hansome

没有TI的工程师愿意简单的验证一下吗？真的极有可能是固件库的BUG或者是CC2540和CC2541之间RTC部分的差异。