STM32F429IET6 STM32H743IIK6

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STM32F429IET6 STM32H743IIK6

名称深圳市斯瑞特科技有限公司【公司网站】
所在地中国广东深圳
联系人 朱小姐
价格 ￥6.3元/件 点此议价
采购量不限制
发布日期 2020-09-23 13:50 至长期有效

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STM32F429IET6 STM32H743IIK6产品详情

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STM32H743IIK6:STM32H743IIK6
品牌:ST/意法半导体
封装形式:DIP
类型:数字集成电路
用途:军工
功能:单片机
导电类型:双极型
封装外形:金属壳圆形型
集成度:小规模(<50)
型号:STM32H743IIK6
批号:2017+

7.24.2 PLL

The PLL accepts an input clock frequency in the range of 31 kHz to 50 MHz. The input

frequency i*ultiplied up to a high frequency, then divided dow*provide the actual

clock used by the CPU and the USB block.

The PLL input, in the range of 32 kHZ to 50 MHz, may initially be divided down by*alue

‘N’, which may be in the range of 1 to 256. This inpu*vision provides a wide range of

output frequencies from the same input frequency.

Following the PLL inpu*vider is the PLL multiplier. This can multiply the inpu*vider

output through the use of a Current Co*olled Oscillator (CCO) by*alue ‘M’, in the

range of 1 through 32768. The resulting frequency must be in the range of 275 MHz to

550 MHz. The multiplier works by dividing the CCO output by the value of M, then using a

phase-frequency detector to compare the divided CCO output to the multiplier input. The

error value is used to adjust the CCO frequency.

The PLL is turned off and bypassed following a chip Reset and by entering Power-down

mode. PLL is enabled by software only. The program must configure and activate the PLL,

wait for the PLL to Lock, then connect to the PLL as*ock source.

7.24.3 Wake-up timer

The LPC2364/66/68 begins operation at power-up and when awakened from Power-down

mode or Deep power-down mode by using the 4 MHz IRC oscillator as the clock source.

This allows chip operatio*resume quickly. If the main oscillator or the PLL is needed by

the applicati*oftware will need to enable these features and wait for them to stabilize

before they are used as*ock source.

When the main oscillator is initially activated, the wake-up timer allows software to ensure

that the main oscillator is fully functional before the processor uses it as*ock source

and starts to execute instructi*. Th*importan*ower on, all types of Reset, and

以上内容为STM32F429IET6 STM32H743IIK6，本产品由深圳市斯瑞特科技有限公司直销供应。

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