Samsung ML-920 Service Manual page 143

CIRCUIT DESCRIPTION
3-2-5-1 Fpm DRAM reading Timing
Fast Page Mode DRAM can access the page mode. It can read consecutive cells by accessing the page mode while access-
ing the burst. For FPM DRAM, the data are valid only when the nCAS is active.
While configuring the software, you must set the timing register of SFR considering the clock speed and the DRAM spec.
dat a
wait dat a wait
addr
5Mhz
MCLK
nRAS
nCAS
column address column address
r ow address
DRAMA
nOE
nWE
dat a 0 dat a 1
DRAMD
Trp Trc
Tcas Tcas
<FPM Read Timing Diagram>
Repair Manual
3-13
Samsung Electronics
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