DRAM PLD DESCRIPTIONS
"bu. cycle tracking
state.dlagr.m [bu,cyc,pipecycl
.tate [1,11: "Idle
if (!ad, I pclk) then [0,11
e I ,e [1, 1 1 ;
,tate [0,11: ".ctlve
if (Iready I .d. I pclk) the n [1, 1 1
el,e If (Iready I !.d. pclk) then [1,01 el.e [0,11;
,tate [1,01: "plpelined if (pclk> then [0,11
e I ,e [1, 0 1 ;
st.te [0,01: "Illegal got a [1, 1 1 ;
""II"llllt,"""""IIIIIIIIII"""IIII""II"IIIIIIIIII"II"1111""IIIIUIIHIIII"'IIIIIIIIIIIII"IIII"II"II""
start.diagram [dram,tart,rowsell;
.tate idle: "wait for DRAM or refresh cycle.
If (pclk I !ad. I mio I select I !muxoe I !p.2 I r.,Op • !refin ) then startdram
el,e if (pclk I !ad, • mlo I ,elect I !muxoe • p.2 • ra,lp !refln) then ,tartdram
el,e If (pclk • ad. & mlo • ,elect . !muxoe • ra,lp • ra.Op
•!bu,cyc • !iready • !refln) then .tartdram el,e idle;
,t . te ,tartdram: | " B5sert dramstart |
goto coLden; |
|
,tate col.den: "change row,el to ,elect column on mux. if (pclk) then coLden2
else coLden;
,tate coLden2:
If (polk) then Idle el,e coLden2;
""II""IIII"UIIII"IIII""""IIIIIIIIU"IIIIIIII"IIII""'III1IIInll""IIII'III""lllln'IIIII""IIIIOIIII""
.t.te.di.gram [r.,OI;
,tate ra,Oldle: "wait for DRAM or refre,h cycle,
if (pclk I !ad, • miD I ,elect . !muxoe I !pa2 I r.,Dp !refin) then ra,Oaet
el.e if (pelk I ,elect I miD' !muxoe & !pa2 I ra,Op !bu,eye • !refln I ! Iready) then ra,Oaet
el,e if (pelk I muxoe I !refadroe) then ra,Oaet el.e ra,Oidle;
,tate ra.Daet: " . "ert r . , for bank 0 If (pelk I reset) then ra,Oldle
else if (pelk I Iready) then rasOldle
else if (pclk & muxoe & ref.droe) then rasOldle
el!H!! rasOactj
"IIII""""IIII""II""II"IIIIIIII'U"IIIIII"IIII""II"IIII"IIII""IIIIUII""IIII"""II""IIII"IIIIII""II
