STM32F722IC datasheet(141/229 Pages) STMICROELECTRONICS

tên linh kiện	STM32F722IC

Giải thích chi tiết về linh kiện	Arm Cortex-M7 32b MCUFPU, 462DMIPS, up to 512KB Flash

PDF	229 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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141 / 229 page

DS11853 Rev 6

141/229

STM32F722xx STM32F723xx

Electrical characteristics

201

An amplitude quantization error may be generated because the linear modulation profile is

obtained by taking the quantized values (rounded to the nearest integer) of MODPER and

INCSTEP. As a result, the achieved modulation depth is quantized. The percentage

quantized modulation depth is given by the following formula:

As a result:

Figure 43 and Figure 44 show the main PLL output clock waveforms in center spread and

down spread modes, where:

F0 is fPLL_OUT nominal.

Tmode is the modulation period.

md is the modulation depth.

Figure 43. PLL output clock waveforms in center spread mode

Figure 44. PLL output clock waveforms in down spread mode

mdquantized%

MODEPER INCSTEP

100

()

–

() PLLN

()

⁄

mdquantized%

250 126

100

()

–

() 240

()

⁄

2.002%(peak)

Frequency (PLL_OUT)

Time

tmode

2xtmode

ai17291

Frequency (PLL_OUT)

Time

tmode

2xtmode

2xmd

ai17292b

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