參數(shù)資料
型號: UPD45128841G5-A80
廠商: NEC Corp.
英文描述: 128M-bit Synchronous DRAM 4-bank, LVTTL
中文描述: 128兆位同步DRAM 4銀行,LVTTL
文件頁數(shù): 20/92頁
文件大?。?/td> 1107K
代理商: UPD45128841G5-A80
Data Sheet M12650EJBV0DS00
20
μ
PD45128441, 45128841, 45128163
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
UPD45128841G5-A80-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128163G5-A10B 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128163G5-A10B-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128163G5-A75 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128163G5-A75-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD4516161AG5A109NF 制造商:NEC Electronics Corporation 功能描述:
UPD4516161AG5-A10-9NF 制造商:NEC Electronics Corporation 功能描述:SDRAM, 1M x 16, 50 Pin, Plastic, TSOP
UPD4528BC 制造商:Panasonic Industrial Company 功能描述:IC
UPD4528C 制造商:Panasonic Industrial Company 功能描述:IC SUB:TC4528BP OR TVSTC4528BP
UPD4564163G5-A10B-9JF 制造商:NEC Electronics Corporation 功能描述:SDRAM, 4M x 16, 54 Pin, Plastic, TSOP