SLAU846A June 2023 – October 2023 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3105-Q1 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3505-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1
Several tuning parameters must be configured in the SYSPLLPARAM0 and SYSPLLPARAM1 registers before using the SYSPLL. The values are determined by PLL feedback loop input clock frequency (fLOOPIN).
SYSPLL supports four fLOOPIN frequency ranges, given in SYSPLL Parameter Lookup. Each frequency range has a 64-bit lookup value in the FACTORY flash memory region that must be copied from flash into the SYSPLLPARAM0 and SYSPLLPARAM1 registers in SYSCTL before enabling the SYSPLL.
fLOOPIN | Lookup Address (PARAM0) | Lookup Address (PARAM1) |
---|---|---|
32 MHz ≤ FREQ ≤ 48 MHz | 0x41C4.0034 | 0x41C4.0038 |
16 MHz ≤ FREQ < 32 MHz | 0x41C4.002C | 0x41C4.0030 |
8 MHz ≤ FREQ < 16 MHz | 0x41C4.0024 | 0x41C4.0028 |
4 MHz ≤ FREQ < 8 MHz | 0x41C4.001C | 0x41C4.0020 |