User's Manual

S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-25
Table 29-11. Memory Interface Timing Constants (SDRAM)
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), T
A
= -40 to 85°C, VDD_SDRAM = 1.8V ± 0.1V,
133MHz, CL = 15pF)
Parameter Symbol Min Max Unit
SDRAM Address Delay
t
SAD
1.65 4.25 ns
SDRAM Chip Select Delay
t
SCSD
1.62 3.84 ns
SDRAM Row active Delay
t
SRD
1.70 3.86 ns
SDRAM Column active Delay
t
SCD
1.68 3.93 ns
SDRAM Byte Enable Delay
t
SBED
1.63 4.31 ns
SDRAM Write enable Delay
t
SWD
1.63 3.74 ns
SDRAM read Data Setup time
t
SDS
1.50 - ns
SDRAM read Data Hold time
t
SDH
1.50 - ns
SDRAM output Data Delay
t
SDD
1.57 4.61 ns
SDRAM Clock Enable Delay
t
CKED
1.69 4.02 ns
NOTE: If CL increases over the 15pF, operation conditions follow the guide table
Load Capacitance (CL) Bus clock Voltage
< 15 pF 133MHz
15 pF < CL < 20 pF 100MHz
1.8V± 0.1V