參數(shù)資料
型號: UPD4564841G5
廠商: Elpida Memory, Inc.
英文描述: 64M-bit Synchronous DRAM 4-bank, LVTTL
中文描述: 6400位同步DRAM 4銀行,LVTTL
文件頁數(shù): 20/85頁
文件大?。?/td> 919K
代理商: UPD4564841G5
Data Sheet E0149N10
20
μ
PD4564441, 4564841, 4564163
5. Initialization
The synchronous DRAM is initialized in the power-on sequence according to the following.
(1) To stabilize internal circuits, when power is applied, a 100
μ
s or longer pause must precede any signal toggling.
(2) After the pause, all banks must be precharged using the Precharge command (The Precharge all banks
command is convenient).
(3) Once the precharge is completed and the minimum t
RP
is satisfied, the mode register can be programmed.
After the mode register set cycle, t
RSC
(2 CLK minimum) pause must be satisfied as well.
(4) Two or more CBR (auto) refresh must be performed.
Remarks 1.
The sequence of Mode register programming and Refresh above may be transposed.
2.
CKE and DQM must be held high until the Precharge command is issued to ensure data-bus Hi-Z.
相關(guān)PDF資料
PDF描述
UPD4564163 64M-bit Synchronous DRAM 4-bank, LVTTL
UPD4564163G5 64M-bit Synchronous DRAM 4-bank, LVTTL
UPD4564441 64M-bit Synchronous DRAM 4-bank, LVTTL
UPD4564841 64M-bit Synchronous DRAM 4-bank, LVTTL
UPD485505 LINE BUFFER 5K-WORD BY 8-BIT
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