Samsung SCX-5312F - Page 131

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