Xerox WorkCentre Pro 412 Service Manual page 39

5-2-5-1 FPM DRAM Reading Timing
Fast Page Mode DRAM can access the page mode. It can read consecutive cells by accessing the page
mode while accessing 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.
addr
5Mhz
MCLK
nRAS
nCAS
DRAMA
nOE
nWE
DRAMD
WorkCentre Pro 412
Launch Issue
wait
column address
r ow address
Trp Trc
FPM Read Timing Diagram
August 2001
dat a wait
column address
dat a 0 dat a 1
Tcas Tcas
Circuit Description
dat a
5-13