hm5216165 Elpida Memory, Inc., hm5216165 Datasheet - Page 21

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

Write with auto precharge: In this operation, since precharge is automatically performed after completing a
burst write or single write operation, a precharge command need not be executed after each write operation.
The command executed for the same bank after the execution of this command must be the bank active
(ACTV) command. In addition, an interval of l
the next command.
Burst Write (Burst Length = 4)
Single Write
Full-page Burst Stop
Burst stop command during burst read: The burst stop (BST) command is used to stop data output during
a full-page burst. The BST command sets the output buffer to High-Z and stops the full-page burst read. The
timing from command input to the last data changes depending on the CAS latency setting. In addition, the
BST command is valid only during full-page burst mode, and is invalid with burst lengths 1, 2, 4 and 8.
CAS latency
1
2
3
Command
Command
I/O (input)
I/O (input)
CLK
CLK
WRIT
WRIT
in0
in
in1
BST to valid data
0
1
2
l APW
Data Sheet E0167H10
in2
in3
APW
is required between the final valid data input and input of
ACTV
l
APW
BST to high impedance
1
2
3
HM5216165 Series
ACTV
21