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W9825G6JH
11.15 Auto-precharge Timing (Read Cycle)
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(1) CAS Latency=2
( a ) burst length = 1
Command
Read
AP
Act
t RP
DQ
( b ) burst length = 2
Q0
Command
Read
AP
Act
t RP
DQ
( c ) burst length = 4
Q0
Q1
Command
Read
AP
Act
t RP
DQ
Q0
Q1
Q2
Q3
( d ) burst length = 8
Command
Read
AP
t RP
Act
DQ
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
(2) CAS Latency=3
( a ) burst length = 1
Command
Read
AP
Act
t RP
DQ
( b ) burst length = 2
Q0
Command
Read
AP
Act
t RP
DQ
( c ) burst length = 4
Q0
Q1
Command
Read
AP
Act
t RP
DQ
Q0
Q1
Q2
Q3
( d ) burst length = 8
Command
Read
AP
Act
t RP
DQ
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Note:
Read
AP
Act
represents the Read with Auto precharge command.
represents the start of internal precharging.
represents the Bank Activ ate command.
When the Auto precharge command is asserted, the period f rom Bank Activ ate command to
t
the start of internal precgarging must be at least RAS (min).
Publication Release Date: Mar. 13, 2014
- 36 -
Revision: A09
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