參數(shù)資料
型號(hào)： UPD45128841G5-A75-9JF
廠商： ELPIDA MEMORY INC
元件分類(lèi)： DRAM
英文描述： 128M-bit Synchronous DRAM 4-bank, LVTTL
中文描述： 16M X 8 SYNCHRONOUS DRAM, 5.4 ns, PDSO54
封裝： PLASTIC, TSOP2-54
文件頁(yè)數(shù)： 26/92頁(yè)
文件大?。?/td> 682K
代理商： UPD45128841G5-A75-9JF
Data Sheet E0031N30
26
μ
PD45128441, 45128841, 45128163
10. Auto Precharge
During a read or write command cycle, A10 controls whether auto precharge is selected. A10 high in the Read or
Write command (Read with Auto precharge command or Write with Auto precharge command), auto precharge is
selected and begins automatically.
The t
RAS
must be satisfied with a read with auto precharge or a write with auto precharge operation. In addition, the
next activate command to the bank being precharged cannot be executed until the precharge cycle ends.
In read cycle, once auto precharge has started, an activate command to the bank can be issued after t
RP
has been
satisfied.
In write cycle, the t
DAL
must be satisfied to issue the next activate command to the bank being precharged.
The timing that begins the auto precharge cycle depends on both the /CAS latency programmed into the mode
register and whether read or write cycle.
10.1 Read with Auto Precharge
During a read cycle, the auto precharge begins one clock earlier (/CAS latency of 2) or two clocks earlier (/CAS
latency of 3) the last data word output.
QB1
QB2
QB3
QB4
Auto precharge starts
READA B
Hi-Z
QB1
QB2
QB3
QB4
Auto precharge starts
READA B
Hi-Z
DQ
Command
DQ
Command
/CAS latency = 2
/CAS latency = 3
CLK
T0
T2
T1
T3
T4
T5
T6
T7
T8
Burst length = 4
(t
RAS
must be satisfied)
T9
Remark
READA means Read with Auto precharge
相關(guān)PDF資料
PDF描述
UPD45128441G5-A75-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128841G5-A75L-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128841G5-A80-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128841G5-A80L-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128441G5-A75L-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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*