Samsung SCX-5312F - Page 130

3-13
Samsung Electronics
CIRCUIT DESCRIPTION
Repair Manual
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.
5Mhz
MCLK
DRAMD
nWE
nOE
DRAMA
nCAS
nRAS
Trp Trc
Tcas
Tcas
data 1data 0
row address
column address
column address
addr
wait waitdata
data
<FPM Read Timing Diagram>