在ti-sdk-omapl138-lcdk-01.00.00/host-tools/flash_utils/OMAP-L138_FlashAndBootUtils_2_40/OMAP-L138/Common/src/device.c中看到:
Uint32 DEVICE_PLL0Init(Uint8 clk_src, Uint8 pllm, Uint8 prediv, Uint8 postdiv, Uint8 div1 ,Uint8 div3, Uint8 div7);
#if defined(AM1808)
// CPU(s) at 456 MHz
status |= DEVICE_PLL0Init(0, 18, 0, 0, 0, 18, 8);
#else
// CPU(s) at 300 MHz
status |= DEVICE_PLL0Init(0, 24, 0, 1, 0, 11, 5);
#endif
如果工作频率在300M,那么PLLDIV3设置的就是11吧,而armubl-03.20.00.14中PLL0的PLLDIV3设置的就是默认值2。