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NT5DS64M4AT NT5DS64M4AW
NT5DS32M8AT NT5DS32M8AW
256Mb Double Data Rate SDRAM
REV 1.1
12/2001
44
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NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
Precharge
The Precharge command is used to deactivate the open row in a particular bank or the open row in all banks. The
bank(s) is available for a subsequent row access some specified time (tRP) after the Precharge command is
issued. Input A10 determines whether one or all banks are to be precharged, and in the case where only one bank
is to be precharged, inputs BA0, BA1 select the bank. When all banks are to be precharged, inputs BA0, BA1 are
treated as “Don’t Care.” Once a bank has been precharged, it is in the idle state and must be activated prior to any
Read or Write commands being issued to that bank.
Precharge Command
BA
HIGH
BA = bank address
CK
CK
CKE
CS
RAS
CAS
WE
A10
BA0, BA1
Don’t Care
All Banks
One Bank
(if A10 is Low, otherwise Don’t Care).
A0-A9, A11, A12
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