参数资料
型号: HY5PS1G821LM
厂商: Hynix Semiconductor Inc.
英文描述: 1Gb DDR2 SDRAM(DDP)
中文描述: 1G DDR2内存(铂)
文件页数: 44/79页
文件大小: 1109K
代理商: HY5PS1G821LM
Rev. 0.2 / Oct. 2005
44
1
HY5PS12421(L)M
HY5PS12821(L)M
Example 1: Burst Read Operation with Auto Precharge:
RL = 4, AL = 1, CL = 3, BL = 8, t
RTP
<= 2 clocks
T0
T2
T1
Example 2: Burst Read Operation with Auto Precharge:
RL = 4, AL = 1, CL = 3, BL = 4, t
RTP
> 2 clocks
CMD
NOP
NOP
NOP
NOP
DQ’s
NOP
CK/CK
DOUT A
0
DOUT A
1
DOUT A
2
DOUT A
3
READ A
Post CAS
RL =4
DQS/DQS
T3
T4
T5
T6
T7
T 8
AL + BL/2 clks
AL = 1
CL = 3
> = t
RTP
DOUT A
4
DOUT A
5
DOUT A
6
DOUT A
7
first 4-bit prefetch
second 4-bit prefetch
NOP
t
RTP
NOP
Precharge begins here
Activate
Bank A
> = t
RP
Autoprecharge
CMD
NOP
NOP
NOP
NOP
DQ’s
NOP
CK/CK
DOUT A
0
DOUT A
1
DOUT A
2
DOUT A
3
READ A
Autoprecharge
Post CAS
RL =4
DQS/DQS
T0
T2
T1
T3
T4
T5
T6
T7
T 8
> = AL + tRTP + tRP
AL = 1
CL = 3
4-bit prefetch
NOP
t
RTP
NOP
Precharge begins here
Activate
Bank A
t
RP
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