User`s manual

7: A.C. CHARACTERISTICS
1-32 EPSON S1D13504 SERIES HARDWARE FUNCTIONAL
SPECIFICATION (X19A-A-002-17)
7.3.2 EDO-DRAM Write Timing
Figure 7-13 EDO-DRAM Write Timing
Table 7-13 EDO DRAM 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
CAS# pulse width
0.45
t1 0.55 t1 + 1
ns
t8
CAS# precharge time
0.45
t1 - 1 0.55 t1
ns
t9
RAS# hold time
1
t1
ns
t10
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
t11
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
t12
Write command setup time
0.45
t1 - 1
ns
t13
Write command hold time
0.45
t1
ns
t14
Write Data setup time
0.45
t1 - 3
ns
t15
Write Data hold time
0.45
t1 - 2
ns
t10
d1
t11
d2 d3 d4
t12
t13
t14 t15
t1
RAS#
CAS#
MA
MD(Write)
RC1C2C3C4
t3
t4
t5 t6
t7
t8 t9
t2
WE#
Memory
Clock