LG Semicon
GM72V66841CT/CLT
Command Intervals
Even when the first command is a burst read that
is not yet finished, the data read by the second
command will be valid.
Read command to Read command interval:
1. Same bank, same ROW address:
When another read command is executed at the
same ROW address of the same bank as the
preceding read command execution, the second
read can be performed after an interval of no less
than 1 cycle.
READ to READ Command Interval (Same Row Address in Same Bank)
CLK
ACTV
Row
READ READ
Command
Address
(A0-A11)
Column A Column B
BS(A12/A13)
Dout
out A0 out B0 out B1 out B2 out B3
Column=A Column=B
Bank0
Active
Column=A Column=B
CAS Latency =3
Burst Length = 4
Bank0
Read
Read
Dout
Dout
2. Same bank, different ROW address:
3. Different bank:
When the ROW address changes on same bank,
consecutive read commands cannot be executed;
it is necessary to separate the two read commands
with a Precharge command and a bank-active
command.
When the bank changes, the second read can be
performed after an interval of no less than 1
cycle, provided that the other bank is in the bank-
active state. Even when the first command is a
burst read that is not yet finished, the data read
by the second command will be valid.
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LG [ LG SEMICON CO.,LTD. ]
