w942508ch Winbond Electronics Corp America, w942508ch Datasheet - Page 30

• Manufacturer Part Number: w942508ch
• Description: 8m X 4 Banks X 8 Bit Ddr Sdram
• Manufacturer: Winbond Electronics Corp America

Timing Waveforms, continued
10.3 Read Timing (Burst Length = 4)
CAS
CAS
Note: The correspondence of LDQS, UDQS to DQ. ( W942516AH)
Output
Output
(Data)
(Data)
latency=2
DQS
DQS
CLK
latency=2.5
CMD
ADD
CLK
UDQS
LDQS
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t
t
IS
IS
READ
Col
DQ8~15
DQ0~7
t
t
IH
IH
Hi-Z
Hi-Z
Hi-Z
Hi-Z
t
CH
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t
CL
t
RPRE
Preamble
t
CK
t
RPE
Preamble
t
t
AC
LZ
- 30 -
t
DQSCK
t
QA0
DA0
DQSQ
t
t
AC
LZ
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t
t
DQSCK
DQSCK
t
QA0
t
DA0
QA1
DA1
DQSQ
QH
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t
DQSCK
t
t
QA1
t
DQSQ
DA1
QH
DA2
QA2
QH
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t
Postamble
t
DQSCK
t
DQSQ
QA2
DA2
QH
t
t
DA3
QA3
t
RPST
DQSQ
HZ
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W942508CH
t
Postamble
DQSCK
t
t
DA3
QA3
t
RPST
DQSQ
HZ
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Hi-Z
Hi-Z
Hi-Z
Hi-Z