hm5216165 Elpida Memory, Inc., hm5216165 Datasheet - Page 25

• Manufacturer Part Number: hm5216165
• Description: 16 M Lvttl Interface Sdram 512-kword ? 16-bit ? 2-bank
• Manufacturer: Elpida Memory, Inc.

Write command to Write command interval:
Same bank, same ROW address: When another write command is executed at the same ROW address of
the same bank as the preceding write command, the second write can be performed after an interval of no less
than 1 cycle. In the case of burst writes, the second write command has priority.
WRITE to WRITE Command Interval (same ROW address in same bank)
Same bank, different ROW address: When the ROW address changes, consecutive write commands
cannot be executed; it is necessary to separate the two write commands with a precharge command and a
bank-active command.
Different bank: When the bank changes, the second write can be performed after an interval of no less than
1 cycle, provided that the other bank is in the bank-active state. In the case of burst write, the second write
command has priority.
WRITE to WRITE Command Interval (different bank)
Command
Command
Address
(A0-A10)
Address
(A0-A10)
BS (A11)
BS (A11)
Din
Din
CLK
CLK
Bank0
Active
ACTV
Bank0
ACTV
Active
Row 0
Row
Column =A
Write
Column A
WRIT
ACTV WRIT
Bank1
Active
in A0
Row 1
Column =B
Column B
Column A
WRIT
Bank0
in B0
in A0
Write
Data Sheet E0167H10
Write
Column B
WRIT
in B1
in B0
Bank1
Write
in B2
in B1
in B3
in B2
in B3
HM5216165 Series
Burst Write Mode
Burst Length = 4
Burst Write Mode
Burst Length = 4
Bank0
25