Микроконтроллеры

Только начинаю работать с SDRAM (МК AT91SAM9261) и не понятен один момент ее инициализации: Откуда взялось вот это число (0xCAFEDEDE) и как его понять при выполнениии комманды "Load Mode Register" Не проходите мимо :) Спасибо. void AT91F_InitSDRAM32 (void) { volatile unsigned int i; AT91PS_SDRAMC psdrc = AT91C_BASE_SDRAMC; AT91F_SDRAMC_CfgPIO(); psdrc->SDRAMC_CR = AT91C_SDRAMC_NC_9 | AT91C_SDRAMC_NR_13 | AT91C_SDRAMC_CAS_2 | AT91C_SDRAMC_NB_4_BANKS | AT91C_SDRAMC_DBW_32_BITS | AT91C_SDRAMC_TWR_2 | AT91C_SDRAMC_TRC_7 | AT91C_SDRAMC_TRP_2 | AT91C_SDRAMC_TRCD_2 | AT91C_SDRAMC_TRAS_5 | AT91C_SDRAMC_TXSR_8 ; psdrc->SDRAMC_MR = 0x00000002; // Set PRCHG AL *AT91C_SDRAM = 0x00000000; // Perform PRCHG psdrc->SDRAMC_MR = AT91C_SDRAMC_MODE_RFSH_CMD; // Set 1st CBR *(AT91C_SDRAM+4) = 0x00000001; // Perform CBR psdrc->SDRAMC_MR = 0x00000004; // Set 2 CBR *(AT91C_SDRAM+8) = 0x00000002; // Perform CBR psdrc->SDRAMC_MR = AT91C_SDRAMC_MODE_RFSH_CMD; // Set 3 CBR *(AT91C_SDRAM+0xc) = 0x00000003; // Perform CBR psdrc->SDRAMC_MR = AT91C_SDRAMC_MODE_RFSH_CMD; // Set 4 CBR *(AT91C_SDRAM+0x10) = 0x00000004; // Perform CBR psdrc->SDRAMC_MR = AT91C_SDRAMC_MODE_RFSH_CMD; // Set 5 CBR *(AT91C_SDRAM+0x14) = 0x00000005; // Perform CBR psdrc->SDRAMC_MR = AT91C_SDRAMC_MODE_RFSH_CMD; // Set 6 CBR *(AT91C_SDRAM+0x18) = 0x00000006; // Perform CBR psdrc->SDRAMC_MR = AT91C_SDRAMC_MODE_RFSH_CMD; // Set 7 CBR *(AT91C_SDRAM+0x1c) = 0x00000007; // Perform CBR psdrc->SDRAMC_MR = AT91C_SDRAMC_MODE_RFSH_CMD; // Set 8 CBR *(AT91C_SDRAM+0x20) = 0x00000008; // Perform CBR psdrc->SDRAMC_MR = AT91C_SDRAMC_MODE_LMR_CMD; // Set LMR operation *(AT91C_SDRAM+0x24) = 0xcafedede; // Perform LMR burst=1, lat=2 //psdrc->SDRAMC_TR = (AT91C_MASTER_CLOCK * 7)/1000000; // Set Refresh Timer 390 for 25MHz (TR= 15.6 * F ) // (F : system clock freq. MHz psdrc->SDRAMC_MR = AT91C_SDRAMC_MODE_NORMAL_CMD; // Set Normal mode *AT91C_SDRAM = 0x00000000; // Perform Normal mode } //*------------------------------------------------------------------------------