stm32 /stm32h7 /STM32H7B0 /RCC /RCC_PLL3DIVR

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Interpret as RCC_PLL3DIVR

31 2827 2423 2019 1615 1211 87 43 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0DIVN30 (B_0x0)DIVP30 (B_0x0)DIVQ30 (B_0x0)DIVR3

DIVP3=B_0x0, DIVQ3=B_0x0, DIVR3=B_0x0

Fields

DIVN3

Multiplication factor for PLL3 VCO Set and reset by software to control the multiplication factor of the VCO. These bits can be written only when the PLL is disabled (PLL3ON = PLL3RDY = 0). …: not used … … Others: wrong configurations The software must set correctly these bits to insure that the VCO output frequency is between its valid frequency range, that is: 128 to 560 MHz if PLL3VCOSEL = 0 150 to 420 MHz if PLL3VCOSEL = 1 VCO output frequency = Fref3_ck x DIVN3, when fractional value 0 has been loaded into FRACN3, with: DIVN3 between 8 and 420 The input frequency Fref3_ck must be between 1 and 16MHz

6 (B_0x6): wrong configuration

7 (B_0x7): DIVN3 = 8

128 (B_0x80): DIVN3 = 129 (default after reset)

419 (B_0x1A3): DIVN3 = 420

DIVP3

PLL3 DIVP division factor Set and reset by software to control the frequency of the pll3_p_ck clock. These bits can be written only when the PLL3 is disabled (PLL3ON = PLL3RDY = 0). …

0 (B_0x0): pll3_p_ck = vco3_ck

1 (B_0x1): pll3_p_ck = vco3_ck / 2 (default after reset)

2 (B_0x2): pll3_p_ck = vco3_ck / 3

3 (B_0x3): pll3_p_ck = vco3_ck / 4

127 (B_0x7F): pll3_p_ck = vco3_ck / 128

DIVQ3

PLL3 DIVQ division factor Set and reset by software to control the frequency of the pll3_q_ck clock. These bits can be written only when the PLL3 is disabled (PLL3ON = PLL3RDY = 0). …

0 (B_0x0): pll3_q_ck = vco3_ck

1 (B_0x1): pll3_q_ck = vco3_ck / 2 (default after reset)

2 (B_0x2): pll3_q_ck = vco3_ck / 3

3 (B_0x3): pll3_q_ck = vco3_ck / 4

127 (B_0x7F): pll3_q_ck = vco3_ck / 128

DIVR3

PLL3 DIVR division factor Set and reset by software to control the frequency of the pll3_r_ck clock. These bits can be written only when the PLL3 is disabled (PLL3ON = PLL3RDY = 0). …

0 (B_0x0): pll3_r_ck = vco3_ck

1 (B_0x1): pll3_r_ck = vco3_ck / 2 (default after reset)

2 (B_0x2): pll3_r_ck = vco3_ck / 3

3 (B_0x3): pll3_r_ck = vco3_ck / 4

127 (B_0x7F): pll3_r_ck = vco3_ck / 128

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