hm5264165f-75 Elpida Memory, Inc., hm5264165f-75 Datasheet - Page 17

• Manufacturer Part Number: hm5264165f-75
• Description: 64m Lvttl Interface Sdram
• Manufacturer: Elpida Memory, Inc.

From PRECHARGE state, command operation
To [DESL], [NOP] or [BST]: When these commands are executed, the SDRAM enters the IDLE state after
t
From IDLE state, command operation
To [DESL], [NOP], [BST], [PRE] or [PALL]: These commands result in no operation.
To [ACTV]: The bank specified by the address pins and the ROW address is activated.
To [REF], [SELF]: The SDRAM enters refresh mode (auto-refresh or self-refresh).
To [MRS]: The SDRAM enters the mode register set cycle.
From ROW ACTIVE state, command operation
To [DESL], [NOP] or [BST]: These commands result in no operation.
To [READ], [READ A]: A read operation starts. (However, an interval of t
To [WRIT], [WRIT A]: A write operation starts. (However, an interval of t
To [ACTV]: This command makes the other bank active. (However, an interval of t
Attempting to make the currently active bank active results in an illegal command.
To [PRE], [PALL]: These commands set the SDRAM to precharge mode. (However, an interval of t
required.)
From READ state, command operation
To [DESL], [NOP]: These commands continue read operations until the burst operation is completed.
To [BST]: This command stops a full-page burst.
To [READ], [READ A]: Data output by the previous read command continues to be output. After CAS
latency, the data output resulting from the next command will start.
To [WRIT], [WRIT A]: These commands stop a burst read, and start a write cycle.
To [ACTV]: This command makes other banks bank active. (However, an interval of t
Attempting to make the currently active bank active results in an illegal command.
To [PRE], [PALL]: These commands stop a burst read, and the SDRAM enters precharge mode.
RP
has elapsed from the completion of precharge.
HM5264165F/HM5264805F/HM5264405F-75/A60/B60
Data Sheet E0135H10
RCD
RCD
is required.)
is required.)
RRD
RRD
is required.)
is required.)
RAS
17
is