S1D13505 Epson Electronics America, Inc., S1D13505 Datasheet - Page 72

• Manufacturer Part Number: S1D13505
• Description: LCD Controller
• Manufacturer: Epson Electronics America, Inc.

Page 66
7.3.2 EDO-DRAM CAS Before RAS Refresh Timing
S1D13505
X23A-A-001-14
Symbol
t1
t2
t3
t4
t5
Internal memory clock period
RAS# precharge time (REG[22h] bits 3-2 = 00)
RAS# precharge time (REG[22h] bits 3-2 = 01)
RAS# precharge time (REG[22h] bits 3-2 = 10)
RAS# pulse width (REG[22h] bit 6-5 = 00 and bits 3-2
= 00)
RAS# pulse width (REG[22h] bit 6-5 = 00 and bits 3-2
= 01)
RAS# pulse width (REG[22h] bit 6-5 = 00 and bits 3-2
= 10)
RAS# pulse width (REG[22h] bit 6-5 = 01 and bits 3-2
= 00)
RAS# pulse width (REG[22h] bit 6-5 = 01 and bits 3-2
= 01)
RAS# pulse width (REG[22h] bit 6-5 = 01 and bits 3-2
= 10)
RAS# pulse width (REG[22h] bit 6-5 = 10 and bits 3-2
= 00)
RAS# pulse width (REG[22h] bit 6-5 = 10 and bits 3-2
= 01)
RAS# pulse width (REG[22h] bit 6-5 = 10 and bits 3-2
= 10)
CAS# pulse width
CAS# setup time (REG[22h] bits 3-2 = 00 or 10)
CAS# setup time (REG[22h] bits 3-2 = 01)
Parameter
Memory
Figure 7-16: EDO-DRAM CAS Before RAS Refresh Timing
Table 7-16: EDO-DRAM CAS Before RAS Refresh Timing
RAS#
CAS#
Clock
t4
t2
t1
t5
3.45 t1 - 3
2.45 t1 - 3
1.45 t1 - 3
0.45 t1 - 3
1.45t1 - 3
3 t1 - 3
4 t1 - 3
2 t1 - 3
3 t1 - 3
1 t1 - 3
2 t1 - 3
1 t1 - 3
t6
2t1 - 3
1t1 - 3
t3
Min
25
t2
Epson Research and Development
Hardware Functional Specification
Max
Vancouver Design Center
Issue Date: 01/02/02
Units
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