TI中文支持网Part Number:LAUNCHXL-CC1352R1
sdk:simplelink_cc13xx_cc26xx_sdk_6_10_00_29
請問watchdog timer的clock來源是從哪裡來的? 是RTC嗎?
在datasheet上面看到watchdog timer是1.5MHz clock rate, 這個是從哪一個clock source來的? (SCLK_HF?SCLK_MF?SCLK_LF?)
"The watchdog timer runs on a 1.5 MHz clock rate and cannot be stopped once enabled. The watchdog timer pauses to run in Standby power mode and when a debugger halts the device."
Nick Sun：
您好，
收到您的问题了，我们升级到英文论坛给工程师看下，有答复尽快给到您。
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Nick Sun：
您好，
从文档SWCU185E(CC13x2, CC26x2 SimpleLink Wireless MCU Technical Reference Manual): https://www.ti2k.com/wp-content/uploads/ti2k/DeyiSupport_Bluetooth_swcu185e.pdf
The WDT is running off the INFRASTRUCTURE clock sourced by the MCU Power, Reset, and Clock Management (PRCM) module.
…MCU_AON has two clocks, an INFRASTRUCTURE clock that always runs and a PERBUSULL clock that is identical to the INFRASTRUCTURE clock whenever the SYSBUS clock is running…INFRASTRUCTURE and PERBUSULL clocks are automatically controlled to run at a maximum of half the clock frequency of SCLK_HF, regardless of the settings in PRCM:INFCLKDIVR.RATIO, PRCM:INFCLKDIVS.RATIO, or PRCM:INFCLKDIVDS.RATIO.
5.2.3 Scaler to WDT There is a scaler with a fixed-division ratio of 32 of the MCU clock that is present. Regardless of the settings in the PRCM:INFCLKDIVR, the PRCM:INFCLKDIVS, and the PRCM:INFCLKDIVDS registers, the watchdog counts at a constant speed.所以1.5 MHz是来自 48 MHz (HF)去除以 32。
希望能够帮助到您。
