Xerox WorkCentre Pro 412 Service Manual page 40

Circuit Description
5-2-5-2 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
5-14
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
August 2001
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
WorkCentre Pro 412
Launch Issue