W632GU6KB Datasheet, PDF (42/160 Pages) Winbond – 16M X 8 BANKS X 16 BIT DDR3L SDRAM

W632GU6KB
8.11 ACTIVE Command
The ACTIVE command is used to open (or activate) a row in a particular bank for a subsequent
access. The value on the BA0-BA2 inputs selects the bank, and the address provided on inputs A0-
A13 selects the row. This row remains active (or open) for accesses until a precharge command is
issued to that bank. A PRECHARGE command must be issued before opening a different row in the
same bank.
8.12 PRECHARGE Command
The PRECHARGE command is used to deactivate the open row in a particular bank or the open row
in all banks. The bank(s) will be available for a subsequent row activation a specified time (tRP) after
the PRECHARGE command is issued, except in the case of concurrent auto precharge, where a
READ or WRITE command to a different bank is allowed as long as it does not interrupt the data
transfer in the current bank and does not violate any other timing parameters. 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. A PRECHARGE command is allowed if there is no open row in that bank (idle
state) or if the previously open row is already in the process of precharging. However, the precharge
period will be determined by the last PRECHARGE command issued to the bank.
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Publication Release Date: Jan. 20, 2015
Revision: A06