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STLS2F02 Datasheet(PDF) 22 Page - STMicroelectronics

Part # STLS2F02
Description  Loongson 2F high performance 64-bit superscalar MIPS® microprocessor
PDF  49 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STLS2F02 Datasheet(HTML) 22 Page - STMicroelectronics

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DDR2 SDRAM controller interface description
STLS2F02
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4.2
DDR2 SDRAM read protocol
As shown in Figure 8 DDR2 SDRAM read protocol, the command (CMD) includes RAS_n,
CAS_n and WE_n. When a read request happens, RAS_n=1,CAS_n=0,and WE_n=1.
Figure 8.
DDR2 SDRAM read protocol
CAS latency = 3, read latency = 3, burst length = 8
CMD
READ A
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
≤ tDQSCK
CL=3
RL=3
DOUTA1
DOUTA1
DOUTA2
DOUTA3
DOUTA4
DOUTA5
DOUTA6
DOUTA7
T0
T1
T2
T3
T4
T5
T6
T7
T8
CK/CK
DQS/DQS
DQS



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