STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and ...

RM0008
Connectivity line devices: reset and clock control (RCC)
Bits 11:8 PLL2MUL[3:0]: PLL2 Multiplication Factor
Set and cleared by software to control PLL2 multiplication factor. These bits can be written
only when PLL2 is disabled.
00xx: Reserved
010x: Reserved
0110: PLL2 clock entry x 8
0111: PLL2 clock entry x 9
1000: PLL2 clock entry x 10
1001: PLL2 clock entry x 11
1010: PLL2 clock entry x 12
1011: PLL2 clock entry x 13
1100: PLL2 clock entry x 14
1101: Reserved
1110: PLL2 clock entry x 16
1111: PLL2 clock entry x 20
Bits 7:4 PREDIV2[3:0]: PREDIV2 division factor
Set and cleared by software to select PREDIV2 division factor. These bits can be written only
when both PLL2 and PLL3 are disabled.
0000: PREDIV2 input clock not divided
0001: PREDIV2 input clock divided by 2
0010: PREDIV2 input clock divided by 3
0011: PREDIV2 input clock divided by 4
0100: PREDIV2 input clock divided by 5
0101: PREDIV2 input clock divided by 6
0110: PREDIV2 input clock divided by 7
0111: PREDIV2 input clock divided by 8
1000: PREDIV2 input clock divided by 9
1001: PREDIV2 input clock divided by 10
1010: PREDIV2 input clock divided by 11
1011: PREDIV2 input clock divided by 12
1100: PREDIV2 input clock divided by 13
1101: PREDIV2 input clock divided by 14
1110: PREDIV2 input clock divided by 15
1111: PREDIV2 input clock divided by 16
Doc ID 13902 Rev 9 135/995