參數(shù)資料
型號(hào): HYB25R288180C-745
英文描述: DRAM|RAMBUS|16MX18|CMOS|BGA|66PIN|PLASTIC
中文描述: 內(nèi)存| Rambus公司| 16MX18 |的CMOS | BGA封裝| 66PIN |塑料
文件頁(yè)數(shù): 43/76頁(yè)
文件大?。?/td> 1218K
代理商: HYB25R288180C-745
2002-05-06
Page 43 of 76
HYB25D128400/800/160AT(L)
128-Mbit Double Data Rate SDRAM
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) will be available for a subsequent row access some specified time (t
RP
) after the Precharge com-
mand 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.
W
hen 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
W
rite commands being issued to that bank.
Precharge Command
BA
H
I
GH
BA = bank address
(if A10 is Low, otherwise Don’t Care).
CK
CK
CK
E
CS
RAS
CAS
WE
A10
BA0, BA1
Don’t Care
All Banks
One Bank
A0-A
9
, A11
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