Samsung SF-830 Service Manual page 133

CIRCUIT DESCRIPTION
3-2-5-2 fpm DRAM write timing
addr
5Mhz
MCLK
nRAS
nCAS
DRAMA
nOE
nWE
DRAMD
clock type
40 ns FPM
50 ns FPM
58Mhz
60 ns FPM
70 ns FPM
Repair Manual
3-14
wait
r ow address
column address
Trp Trc
<FPM Write Timing Diagram>
Trp
cycle # register
2 0x1
2 0x1
3 0x2
3 0x2
<SFR Values Example for FPM>
dat a wait
column address
dat a 1
dat a 0
Tcas Tcas
Trc
cycle # register
2 0x1
2 0x1
2 0x1
2 0x1
dat a
Tcas
cycle # register
1 0x0
1 0x0
2 0x1
2 0x1
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