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The minimum SPI clock for CC2420
Hi, I am using CC2420DBK cosist of CC2420 and ATmega128L.
The clock of CC2420 is 16MHz and ATmega128L is 8MHz.
In TI's sample application, the value of SPI clock is 4MHz. (divide 2)
It worked very well.
According to CC2420 chip manual, there is maximum limit of SPI clock which is 10MHz.
But there is no minimum limit.
For low power consumption, I reduced the value as much as possible.
Then it didn't work.
I tested 4MHz, 2MHz, 1MHz, 500kHz, 250kHz, 125kHz, and 62.5kHz.
When the SPI clock value is less than 500kHz, it didn't work.
Is there minimum limit of SPI clock for CC2420?
Is its value 500kHz?
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