采用clock测量程序运行时间时,需要知道这款芯片的主频。
Susan Yang:
您可以看一下用户指南的1.3.16 Clock, Reset, and Power Management
www.ti.com.cn/…/swru543a.pdf
Primary clocks
– Slow clock: 32.768 kHz (±250 ppm)
• Used in RTC, Wi-Fi® beacon listen timing in low-power idle mode and some of the chip internal
sequencing
• On-chip, low-power 32-kHz crystal oscillator
• Support for externally-fed 32.768-kHz clock
• On-chip 32-kHz RC oscillator for initial wakeup– Fast clock: 40 MHz (±20 ppm)
• Used in Wi-Fi® radio and MCU
• On-chip low phase-noise 40-MHz crystal oscillator
• Support for externally fed, clean 40-MHz clock (such as TCXO)
• System and peripheral clocks are derived from internal PLL producing 240 MHz另外可以在CCS内使用工具来测量程序运行时间
software-dl.ti.com/…/ccs_counting_cycles.html
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user6523867:
1.3.16只说了用了40M低噪音的晶体振荡器,并没有说主频是多少呀?我写的程序是基于UDP例程进行更改的,没有进行主频这一块的配置,请问一下,此时主频为多少呢?
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Susan Yang:
system clock 为 (80 MHz)
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user6523867:
好的,谢谢!
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Susan Yang:
不客气,后续有其他问题欢迎随时发帖