User`s manual

7: A.C. CHARACTERISTICS
S1D13504 SERIES HARDWARE FUNCTIONAL EPSON 1-33
SPECIFICATION (X19A-A-002-17)
7.3.3 EDO-DRAM Read-Write Timing
Figure 7-14 EDO-DRAM Read-Write Timing
Table 7-14 EDO DRAM Read-Write Timing
Symbol Parameter Min. Typ. Max. Units
t1
Memory clock period
25 ns
t2
Random read or write cycle time (REG[22h] bits [6:5] = 00)
5
t1
ns
Random read or write cycle time (REG[22h] bits [6:5] = 01)
4
t1
ns
Random read or write cycle time (REG[22h] bits [6:5] = 10)
3
t1
ns
t3
Row address setup time (REG[22h] bits [3:2] = 00)
2.45
t1
ns
Row address setup time (REG[22h] bits [3:2] = 01)
2
t1
ns
Row address setup time (REG[22h] bits [3:2] = 10)
1.45
t1
ns
t4
Row address hold time (REG[22h] bits [3:2] = 00 or 10)
0.45
t1 - 1
ns
Row address hold time (REG[22h] bits [3:2] = 01)
t1 - 1
ns
t5
Column address setup time
0.45
t1 - 1
ns
t6
Column address hold time
0.45
t1 - 1
ns
t7
RAS# precharge time (REG[22h] bits [3:2] = 00)
2
t1 - 1
ns
RAS# precharge time (REG[22h] bits [3:2] = 01)
1.45 t1 - 1
ns
RAS# precharge time (REG[22h] bits [3:2] = 10)
1 t1 - 1
ns
t8
RAS# to CAS# delay time (REG[22h] bit 4 = 0 and bits [3:2] = 00 or 10)
2
t1 - 2 2 t1
ns
RAS# to CAS# delay time (REG[22h] bit 4 = 1 and bits [3:2] = 00 or 10)
1
t1 - 2 1 t1
ns
RAS# to CAS# delay time (REG[22h] bits [3:2] = 01)
1.45
t1 - 2 1.55 t1
ns
t9
Read Data turn-off delay from WE#
0ns
t10
Write Data delay from WE# (REG[22h] bit 7 = 0)
1.45
t1
ns
Write Data delay from WE# (REG[22h] bit 7 = 1)
0.45
t1
ns
RAS#
CAS#
MA
MD(Read)
t7
RC1C2C3
t4 t5 t6
t8
d2
t2
WE#
MD(Write)
d1
d3
t9
t3
t10
t1
Memory
Clock