Samsung ML-920 Service Manual page 146

CIRCUIT DESCRIPTION
3-2-5-4 edo DRAM write timing
addr
5Mhz
MCLK
nRAS
nCAS
DRAMA
nOE
nWE
DRAMD
clock type
40 ns EDO
50 ns EDO
58Mhz
60 ns EDO
70 ns EDO
Repair Manual
3-16
wait
r ow address column
dat a 0
Trp Trc
<FPM Write Timing Diagram>
Trp
cycle # register
2 0x1
2 0x1
3 0x2
3 0x2
<SFR Values Example for FPM>
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wait dat a
dat a
column
dat a 1
Tcas Tcas
Trc
cycle # register
2 0x1
2 0x1
2 0x1
2 0x1
Tcas
cycle # register
1 0x0
1 0x0
1 0x0
2 0x1
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