sed1355 ETC-unknow, sed1355 Datasheet - Page 80

• Manufacturer Part Number: sed1355
• Description: Sed1355 Embedded Ramdac Lcd/crt Controller
• Manufacturer: ETC-unknow

Page 74
7.3.6 FPM-DRAM Self-Refresh Timing
SED1355
X23A-A-001-11
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
1 t1
Min
2 t1
40
Epson Research and Development
Hardware Functional Specification
Vancouver Design Center
Max
Issue Date: 99/05/18
Units
ns
ns
ns
ns
ns
ns