Datasheet

Chapter 11. Synchronous/Asynchronous DRAM Controller Module 11-39
SDRAM Example
11.5.6 Initialization Code
The following assembly code initializes the SDRAM example.
Power-Up Sequence:
move.w #0x8026, d0 //Initialize DCR
move.w d0, DCR
move.l #0xFF880300, d0 //Initialize DACR0
move.l d0, DACR0
move.l #0x00740075, d0 //Initialize DMR0
move.l d0, DMR0
Precharge Sequence:
move.l #0xFF880308, d0 //Set DACR0[IP]
move.l d0, DACR0
move.l #0xBEADDEED, d0 //Write to memory location to init. precharge
move.l d0, 0xFF880000
Refresh Sequence:
move.l #0xFF888300, d0 //Enable refresh bit in DACR0
move.l d0, DACR0
Mode Register Initialization Sequence:
move.l #0x00600075, d0 //Mask bit 19 of address
move.l d0, DMR0
move.l #0xFF888340, d0 //Enable DACR0[IMRS]; DACR0[RE] remains set
move.l d0, DACR0
move.l #0x00000000, d0 //Access SDRAM address to initialize mode
register
move.l d0, 0xFF800800