EDS2504ACTA/08ACTA/16ACTA, EDS2504APTA/08APTA/16APTA
Command Intervals
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 clock. Even when the first command is a burst read that is not yet finished, the data read by the
second command will be valid.
CLK
Command
ACT
Row
READ
READ
Column A Column B
Address
BS
DQ
out A0
out B2 out B3
out B0 out B1
CL = 3
BL = 4
Bank 0
Column =B
Dout
Bank0
Active
Column =A Column =B Column =A
Read Read Dout
READ to READ Command Interval (same ROW address in same bank)
2. Same bank, different ROW address: 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.
3. Different bank: When the bank changes, the second read can be performed after an interval of no less than 1
clock, 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.
CLK
Command
READ READ
ACT
ACT
Column A
Row 1
Column B
Address
BS
Row 0
DQ
out A0
out B2 out B3
out B0 out B1
Bank3
Dout
Bank0
Dout
CL = 3
BL = 4
Bank0
Active
Bank3 Bank0 Bank3
Active Read Read
READ to READ Command Interval (different bank)
Data Sheet E0110E30 (Ver. 3.0)
31
ELPIDA [ ELPIDA MEMORY ]
