S1D13505 Epson Electronics America, Inc., S1D13505 Datasheet - Page 79

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

Epson Research and Development
Vancouver Design Center
7.3.6 FPM-DRAM Self-Refresh Timing
Hardware Functional Specification
Issue Date: 01/02/02
Symbol
t1
t2
t3
t4
Memory
Internal memory clock
RAS# precharge time (REG[22h] bits 3-2 = 00)
RAS# precharge time (REG[22h] bits 3-2 = 01 or 10)
RAS# to CAS# precharge time (REG[22h] bits 3-2 = 00)
RAS# to CAS# precharge time (REG[22h] bits 3-2 = 01 or 10)
CAS# setup time (CAS# before RAS# refresh)
Clock
CAS#
RAS#
t1
t3
Table 7-20: FPM-DRAM CBR Self-Refresh Timing
Parameter
t2
Figure 7-21: FPM-DRAM Self-Refresh Timing
t4
suspend mode
Stopped for
Restarted for
active mode
1.45 t1 - 1
0.45 t1 - 2
2.45 t1 - 1
Min
1 t1
2 t1
40
Max
X23A-A-001-14
S1D13505
Units
Page 73
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