- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385338 > GS8662S08E-333I (GSI TECHNOLOGY) 72Mb Burst of 2 DDR SigmaSIO-II SRAM PDF資料下載
參數(shù)資料
| 型號： | GS8662S08E-333I |
| 廠商： | GSI TECHNOLOGY |
| 元件分類： | DRAM |
| 英文描述： | 72Mb Burst of 2 DDR SigmaSIO-II SRAM |
| 中文描述： | 8M X 8 DDR SRAM, 0.45 ns, PBGA165 |
| 封裝： | 15 X 17 MM, 1 MM PITCH, MO-216CAB-1, FPBGA-165 |
| 文件頁數(shù)： | 7/37頁 |
| 文件大小： | 960K |
| 代理商： | GS8662S08E-333I |
第1頁第2頁第3頁第4頁第5頁第6頁當(dāng)前第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁
Preliminary
GS8662S08/09/18/36E-333/300/250/200/167
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Rev: 1.01 9/2005
7/37
2005, GSI Technology
Background
Separate I/O SRAMs, like SigmaQuad SRAMs, are attractive in applications where alternating reads and writes are needed. On the
other hand, Common I/O SRAMs like the SigmaCIO family are popular in applications where bursts of read or write traffic are
needed. The SigmaSIO SRAM is a hybrid of these two devices. Like the SigmaQuad family devices, the SigmaSIO features a
separate I/O data path, offering the user independent Data In and Data Out pins. However, the SigmaSIO devices offer a control
protocol like that offered on the SigmaCIO devices. Therefore, while SigmaQuad SRAMs allow a user to operate both data ports at
the same time, they force alternating loads of read and write addresses. SigmaSIO SRAMs allow continuous loads of read or write
addresses like SigmaCIO SRAMs, but in a separate I/O configuration.
Like a SigmaQuad SRAM, a SigmaSIO-II SRAM can execute an alternating sequence of reads and writes. However, doing so
results in the Data In port and the Data Out port stalling with nothing to do on alternate transfers. A SigmaQuad device would keep
both ports running at capacity full time. On the other hand, the SigmaSIO device can accept a continuous stream of read commands
and read data or a continuous stream of write commands and write data. The SigmaQuad device, by contrast, restricts the user from
loading a continuous stream of read or write addresses. The advantage of the SigmaSIO device is that it allows twice the random
address bandwidth for either reads or writes than could be acheived with a SigmaQuad version of the device. SigmaCIO SRAMs
offer this same advantage, but do not have the separate Data In and Data Out pins offered on the SigmaSIO SRAMs. Therefore,
SigmaSIO devices are useful in psuedo dual port SRAM applications where communication of burst traffic between two
electrically independent busses is desired.
Each of the three SigmaQuad Family SRAMs—SigmaQuad, SigmaCIO, and SigmaSIO—supports similar address rates because
random address rate is determined by the internal performance of the RAM. In addition, all three SigmaQuad Family SRAMs are
based on the same internal circuits. Differences between the truth tables of the different devices proceed from differences in how
the RAM’s interface is contrived to interact with the rest of the system. Each mode of operation has its own advantages and
disadvantages. The user should consider the nature of the work to be done by the RAM to evaluate which version is best suited to
the application at hand.
Burst of 2 Sigma SIO-II SRAM DDR Read
The status of the Address Input, R/W, and LD pins are sampled at each rising edge of K. LD high causes chip disable. A high on
the R/W pin begins a read cycle. The two resulting data output transfers begin after the next rising edge of the K clock. Data is
clocked out by the next rising edge of the C if it is active. Otherwise, data is clocked out at the next rising edge of K. The next data
chunk is clocked out on the rising edge of C, if active. Otherwise, data is clocked out on the rising edge of K.
Burst of 2 Sigma SIO-II SRAM DDR Write
The status of the Address Input, R/W, and LD pins are sampled at each rising edge of K. LD high causes chip disable. A low on the
R/W pin, begins a write cycle. Data is clocked in by the next rising edge of K and then the rising edge of K.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| GS8662S08E | 72Mb Burst of 2 DDR SigmaSIO-II SRAM |
| GS8662S08E-167 | 72Mb Burst of 2 DDR SigmaSIO-II SRAM |
| GS8662S08E-167I | 72Mb Burst of 2 DDR SigmaSIO-II SRAM |
| GS8662S08E-200 | 72Mb Burst of 2 DDR SigmaSIO-II SRAM |
| GS8662S08E-200I | 72Mb Burst of 2 DDR SigmaSIO-II SRAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| GS8662S08GE-167 | 制造商:GSI 制造商全稱:GSI Technology 功能描述:72Mb Burst of 2 DDR SigmaSIO-II SRAM |
| GS8662S08GE-167I | 制造商:GSI 制造商全稱:GSI Technology 功能描述:72Mb Burst of 2 DDR SigmaSIO-II SRAM |
| GS8662S08GE-200 | 制造商:GSI 制造商全稱:GSI Technology 功能描述:72Mb Burst of 2 DDR SigmaSIO-II SRAM |
| GS8662S08GE-200I | 制造商:GSI 制造商全稱:GSI Technology 功能描述:72Mb Burst of 2 DDR SigmaSIO-II SRAM |
| GS8662S08GE-250 | 制造商:GSI 制造商全稱:GSI Technology 功能描述:72Mb Burst of 2 DDR SigmaSIO-II SRAM |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。