option.s

BB40X的bootloader源代码

_ISR_STARTADDRESS   EQU   0x0c7fff00

;Bus width
                    GBLA    BUSWIDTH
BUSWIDTH  SETA      16

;DRAM or SDRAM
                    GBLS    BDRAMTYPE
BDRAMTYPE SETS      "SDRAM"

;PLL setting
                    GBLL    PLLONSTART
PLLONSTART          SETL    {TRUE}

                    GBLA    PLLCLK
PLLCLK              SETA    60000000

  [ PLLCLK = 60000000 
    ;Freq calc：
    ;Fout = (8+ M_DIV)*Fin/[(2+P_DIV)*2]
M_DIV	EQU	52	
P_DIV	EQU	 2
S_DIV	EQU	 1
	]

;************************************************
  END