AHB_FREQ configuration register
AHB_DIV_NUM | Set this field to generate clk_ahb drived by clk_hproot. The clk_ahb is div1(default)/div2/div4/div8 of clk_hproot. This field is only avaliable for low-speed clock-source such as XTAL/FOSC, and should be used together with PCR_CPU_DIV_NUM. |