Xerox WorkCentre Pro 412 Service Manual page 42

Circuit Description
5-2-5-4 edo DRAM Write Timing
addr
5Mhz
MCLK
nRAS
nCAS
DRAMA
nOE
nWE
DRAMD
clock type
40 ns EDO
50 ns EDO
58Mhz
60 ns EDO
70 ns EDO
5-16
wait
r ow address
Trc
Trp
FPM Write Timing Diagram
Trp
cycle # register
2 0x1
2 0x1
3 0x2
3 0x2
SFR Values Example for FPM
August 2001
wait dat a
dat a
column
column
dat a 0 dat a 1
Tcas Tcas
Trc
cycle # register
2 0x1
2 0x1
2 0x1
2 0x1
Tcas
cycle # register
1 0x0
1 0x0
1 0x0
2 0x1
WorkCentre Pro 412
Launch Issue