请问CC2540可以配置成内部震荡吗?就是去掉外面的两个晶振电路,只是用内部震荡,上电就可以运行系统程序?可以的话该怎么配置呢,这会有什么不良影响吗?
此外,CC2540有裸片出售吗?可以从哪买呢?
求大神指点,谢谢了
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内部的晶振不准确!
16-MHz RC OSCILLATOR
Measured on Texas Instruments CC2540 EM reference design with TA = 25°C and VDD = 3 V
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Frequency(1) 16 MHz
Uncalibrated frequency accuracy ±18%
Calibrated frequency accuracy ±0.6%
Start-up time 10 μs
Initial calibration time(2) 50 μs
(1) The calibrated 16-MHz RC oscillator frequency is the 32-MHz XTAL frequency divided by 2.
(2) When the 16-MHz RC oscillator is enabled, it is calibrated when a switch from the 16-MHz RC oscillator to the 32-MHz crystal oscillator
is performed while SLEEPCMD.OSC_PD is set to 0.