User`s manual

7: A.C. CHARACTERISTICS
1-34 EPSON S1D13504 SERIES HARDWARE FUNCTIONAL
SPECIFICATION (X19A-A-002-17)
7.3.4 EDO-DRAM CAS Before RAS Refresh Timing
Figure 7-15 EDO-DRAM CAS Before RAS Refresh Timing
7.3.5 EDO-DRAM Self-Refresh Timing
Figure 7-16 EDO-DRAM Self-Refresh Timing
Table 7-15 EDO-DRAM CAS Before RAS Refresh Timing
Symbol Parameter Min. Typ. Max. Units
t1
Memory clock period
25
ns
t2
RAS# to CAS# precharge time (REG[22h] bits [3:2] = 00)
1.45
t1
ns
RAS# to CAS# precharge time (REG[22h] bits [3:2] = 01 or 10)
0.45
t1
ns
t3
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
t4
CAS# precharge time (REG[22h] bits [3:2] = 00)
2
t1
ns
CAS# precharge time (REG[22h] bits [3:2] = 01 or 10)
1
t1
ns
t5
CAS# setup time (REG[22h] bits [3:2] = 00 or 10)
0.45
t1 - 2
ns
CAS# setup time (REG[22h] bits [3:2] = 01)
1 t1 - 2
ns
t6
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
Table 7-16 EDO-DRAM Self-Refresh Timing
Symbol Parameter Min. Typ. Max. Units
t1
Memory clock period
25 ns
t2
RAS# to CAS# precharge time (REG[22h] bits [3:2] = 00)
1.45
t1
ns
RAS# to CAS# precharge time (REG[22h] bits [3:2] = 01 or 10)
0.45
t1
ns
t3
CAS# precharge time (REG[22h] bits [3:2] = 00)
2
t1
ns
CAS# precharge time (REG[22h] bits [3:2] = 01 or 10)
1
t1
ns
t4
CAS# setup time (REG[22h] bits [3:2] = 00 or 10)
0.45
t1 - 2
ns
CAS# setup time (REG[22h] bits [3:2] = 01)
1 t1 - 2
ns
t5
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
RAS#
CAS#
t4
t6
t5
t2 t3
t1
Memory
Clock
RAS#
CAS#
t3
t2
t4
t5
Memory
Clock
Stopped for
suspend mode
Restarted for
active mode
t1