参数资料
型号: W631GG6KB-15
厂商: Winbond Electronics
文件页数: 42/159页
文件大小: 0K
描述: IC DDR3 SDRAM 1GBIT 96WBGA
标准包装: 200
格式 - 存储器: RAM
存储器类型: DDR3 SDRAM
存储容量: 1G(64M x 16)
速度: 667MHz
接口: 并联
电源电压: 1.425 V ~ 1.575 V
工作温度: 0°C ~ 85°C
封装/外壳: 96-TFBGA
供应商设备封装: 96-WBGA(9x13)
包装: 托盘
W631GG6KB
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-
A12 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 (t RP ) 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.
Publication Release Date: Dec. 09, 2013
Revision A05
- 42 -
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