mirror of
https://github.com/garrettsworkshop/GR8RAM.git
synced 2024-11-04 14:05:00 +00:00
140 lines
4.5 KiB
Plaintext
140 lines
4.5 KiB
Plaintext
Init sequence
|
|
|
|
Init State SDRAM Flash IS Other
|
|
--------------------------------------------------------------------------------
|
|
$00000-$0FFBF Nothing Nothing 0
|
|
$00000 NOP CKE /CS hi, CLK lo
|
|
...
|
|
$0FF90 NOP CKE /CS hi, CLK lo InitActv <= ~BODf
|
|
....
|
|
$0FFA0 NOP CKE /CS lo, CLK lo
|
|
...
|
|
$0FFAF NOP CKE /CS lo, CLK lo
|
|
|
|
$0FFB0-$0FFBF Init: Precharge Send read cmd ($03) 1
|
|
$0FFB0 NOP CKE CLK lo, MOSI 0 (b7)
|
|
$0FFB1 NOP CKE CLK hi
|
|
$0FFB2 NOP CKE CLK lo, MOSI 0 (b6)
|
|
$0FFB3 PC all CLK hi
|
|
$0FFB4 NOP CKE CLK lo, MOSI 0 (b5)
|
|
$0FFB5 NOP CKE CLK hi
|
|
$0FFB6 NOP CKE CLK lo, MOSI 0 (b4)
|
|
$0FFB7 NOP CKE CLK hi
|
|
$0FFB8 NOP CKE CLK lo, MOSI 0 (b3)
|
|
$0FFB9 NOP CKE CLK hi
|
|
$0FFBA NOP CKE CLK lo, MOSI 0 (b2)
|
|
$0FFBB Load mode CLK hi
|
|
$0FFBC NOP CKE CLK lo, MOSI 1 (b1)
|
|
$0FFBD NOP CKE CLK hi
|
|
$0FFBE NOP CKE CLK lo, MOSI 1 (b0)
|
|
$0FFBF NOP CKE CLK hi
|
|
|
|
$0FFC0-$0FFEF Init: mode & ref Send address ($000000) 2
|
|
$0FFC0 NOP CKE CLK lo, MOSI 0 (b23)
|
|
$0FFC1 NOP CKE CLK hi
|
|
$0FFC2 NOP CKE CLK lo, MOSI 0 (b22)
|
|
$0FFC3 AREF CLK hi
|
|
$0FFC4 NOP CKE CLK lo, MOSI Firmware[1] (b21)
|
|
$0FFC5 NOP CKE CLK hi
|
|
$0FFC6 NOP CKE CLK lo, MOSI Firmware[0] (b20)
|
|
$0FFC7 NOP CKE CLK hi
|
|
$0FFC8 NOP CKE CLK lo, MOSI 0 (b19)
|
|
$0FFC9 NOP CKE CLK hi
|
|
$0FFCA NOP CKE CLK lo, MOSI 0 (b18)
|
|
$0FFCB AREF CLK hi
|
|
$0FFCC NOP CKE CLK lo, MOSI 0 (b17)
|
|
$0FFCD NOP CKE CLK hi
|
|
$0FFCE NOP CKE CLK lo, MOSI 0 (b16)
|
|
$0FFCF NOP CKE CLK hi
|
|
$0FFD0 NOP CKE CLK lo, MOSI 0 (b15)
|
|
$0FFD1 NOP CKE CLK hi
|
|
$0FFD2 NOP CKE CLK lo, MOSI 0 (b14)
|
|
$0FFD3 AREF CLK hi
|
|
$0FFD4 NOP CKE CLK lo, MOSI 0 (b13)
|
|
$0FFD5 NOP CKE CLK hi
|
|
$0FFD6 NOP CKE CLK lo, MOSI 0 (b12)
|
|
$0FFD7 NOP CKE CLK hi
|
|
$0FFD8 NOP CKE CLK lo, MOSI 0 (b11)
|
|
$0FFD9 NOP CKE CLK hi
|
|
$0FFDA NOP CKE CLK lo, MOSI 0 (b10)
|
|
$0FFDB AREF CLK hi
|
|
$0FFDC NOP CKE CLK lo, MOSI 0 (b9)
|
|
$0FFDD NOP CKE CLK hi
|
|
$0FFDE NOP CKE CLK lo, MOSI 0 (b8)
|
|
$0FFDF NOP CKE CLK hi
|
|
$0FFE0 NOP CKE CLK lo, MOSI 0 (b7)
|
|
$0FFE1 NOP CKE CLK hi
|
|
$0FFE2 NOP CKE CLK lo, MOSI 0 (b6)
|
|
$0FFE3 AREF CLK hi
|
|
$0FFE4 NOP CKE CLK lo, MOSI 0 (b5)
|
|
$0FFE5 NOP CKE CLK hi
|
|
$0FFE6 NOP CKE CLK lo, MOSI 0 (b4)
|
|
$0FFE7 NOP CKE CLK hi
|
|
$0FFE8 NOP CKE CLK lo, MOSI 0 (b3)
|
|
$0FFE9 NOP CKE CLK hi
|
|
$0FFEA NOP CKE CLK lo, MOSI 0 (b2)
|
|
$0FFEB AREF CLK hi
|
|
$0FFEC NOP CKE CLK lo, MOSI 0 (b1)
|
|
$0FFED NOP CKE CLK hi
|
|
$0FFEE NOP CKE CLK lo, MOSI 0 (b0)
|
|
$0FFEF NOP CKE CLK hi
|
|
|
|
$0FFF0-$0FFFF Init: mode & ref 8 dummy clocks 2
|
|
$0FFF0 NOP CKE CLK lo, MOSIOE 0
|
|
$0FFF1 NOP CKE CLK hi
|
|
$0FFF2 NOP CKE CLK lo
|
|
$0FFF3 AREF CLK hi
|
|
$0FFF4 NOP CKE CLK lo
|
|
$0FFF5 NOP CKE CLK hi
|
|
$0FFF6 NOP CKE CLK lo
|
|
$0FFF7 NOP CKE CLK hi
|
|
$0FFF8 NOP CKE CLK lo
|
|
$0FFF9 NOP CKE CLK hi
|
|
$0FFFA NOP CKE CLK lo
|
|
$0FFFB AREF CLK hi
|
|
$0FFFC NOP CKE CLK lo
|
|
$0FFFD NOP CKE CLK hi
|
|
$0FFFE NOP CKE CLK lo
|
|
$0FFFF NOP CKE CLK hi
|
|
|
|
$10000-$2FFFF Write ROM data Shift in read data 3
|
|
$10000 NOP CKE CLK lo
|
|
$10001 NOP CKE CLK hi, get b7:6 of $000000
|
|
$10002 NOP CKE CLK lo
|
|
$10003 AREF CLK hi, get b5:4 of $000000
|
|
$10004 NOP CKE CLK lo
|
|
$10005 ACT CLK hi, get b3:2 of $000000
|
|
$10006 NOP CKE CLK lo
|
|
$10007 WR AP CLK hi, get b1:0 of $000000
|
|
$10008 NOP CKE CLK lo
|
|
$10009 NOP CKE CLK hi, get b7:6 of $000001
|
|
$1000A NOP CKE CLK lo
|
|
$1000B AREF CLK hi, get b5:4 of $000001
|
|
$1000C NOP CKE CLK lo
|
|
$1000D ACT CLK hi, get b3:2 of $000001
|
|
$1000E NOP CKE CLK lo
|
|
$1000F WR AP CLK hi, get b1:0 of $000001
|
|
...
|
|
$2FFF0 NOP CKE CLK lo
|
|
$2FFF1 NOP CKE CLK hi, get b7:6 of $003FFE
|
|
$2FFF2 NOP CKE CLK lo
|
|
$2FFF3 AREF CLK hi, get b5:4 of $003FFE
|
|
$2FFF4 NOP CKE CLK lo
|
|
$2FFF5 ACT CLK hi, get b3:2 of $003FFE
|
|
$2FFF6 NOP CKE CLK lo
|
|
$2FFF7 WR AP CLK hi, get b1:0 of $003FFE
|
|
$2FFF8 NOP CKE CLK lo
|
|
$2FFF9 NOP CKE CLK hi, get b7:6 of $003FFF
|
|
$2FFFA NOP CKE CLK lo
|
|
$2FFFB AREF CLK hi, get b5:4 of $003FFF
|
|
$2FFFC NOP CKE CLK lo
|
|
$2FFFD ACT CLK hi, get b3:2 of $003FFF
|
|
$2FFFE NOP CKE CLK lo
|
|
$2FFFF WR AP CLK hi, get b1:0 of $003FFF
|
|
|
|
$30000 NOP CKE CLK lo, /CS hi 3
|
|
$30001 NOP CKE CLK lo, /CS hi 3
|
|
$30002 NOP CKE CLK lo, /CS hi 3 SDRAMActv <= InitActv && ~InitInterrupted
|
|
|
|
|