GR8RAM/Documentation/Initialization Sequence

Init sequence

LS				SDRAM					Flash					IS
-------------------------------------------------------------------
$0000-$1FCE		Nothing					Nothing					0
$1FCF			Init: Precharge			Nothing					1
$1FD0-$1FFA		Init: AREF Pause		SPI Select				4
$1FFB			Init: AREF Pause		Dual Read (0x3B)		5
$1FFC			Init: AREF Pause		A[23:16] (0)			5
$1FFD			Init: AREF Pause		A[15:08] (FW in 14:13)	5
$1FFE			Init: AREF Pause		A[07:00] (0)			5
$1FFF			Init: AREF Pause		Dummy					5
$2000-$3FFF		Init: Write ROM			Shift MISO into WRD		6
ugh 2021-03-19 06:56:20 +00:00			`Init sequence`

Update Initialization Sequence 2021-05-08 14:16:39 +00:00			`LS SDRAM Flash IS`
			`-------------------------------------------------------------------`
			`$0000-$1FCE Nothing Nothing 0`
			`$1FCF Init: Precharge Nothing 1`
			`$1FD0-$1FFA Init: AREF Pause SPI Select 4`
			`$1FFB Init: AREF Pause Dual Read (0x3B) 5`
			`$1FFC Init: AREF Pause A[23:16] (0) 5`
			`$1FFD Init: AREF Pause A[15:08] (FW in 14:13) 5`
			`$1FFE Init: AREF Pause A[07:00] (0) 5`
			`$1FFF Init: AREF Pause Dummy 5`
			`$2000-$3FFF Init: Write ROM Shift MISO into WRD 6`