- 您現(xiàn)在的位置：買賣IC網 > PDF目錄223860 > GS4576S09L-25 (GSI TECHNOLOGY) DDR DRAM, PBGA144 PDF資料下載
參數(shù)資料
| 型號： | GS4576S09L-25 |
| 廠商： | GSI TECHNOLOGY |
| 元件分類： | DRAM |
| 英文描述： | DDR DRAM, PBGA144 |
| 封裝： | UBGA-144 |
| 文件頁數(shù)： | 22/64頁 |
| 文件大?。?/td> | 2691K |
| 代理商： | GS4576S09L-25 |
第1頁第2頁第3頁第4頁第5頁第6頁第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頁當前第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頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁
Preliminary
GS4576S09/18L
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Rev: 1.01 4/2011
29/64
2011, GSI Technology
Auto Refresh
The Auto Refresh (AREF) command launches a REFRESH cycle on one row in the bank addressed. Refresh row addresses are
generated by an internal refresh counter, so address inputs are Don’t Care, but a bank addresses (BA 2:0) must be provided during
the AREF command. A refresh may be contining in one bank while other commands, including other AREF commands, are
launched in other banks. The delay between the AREF command and a READ, WRITE or AREF command to the same bank must
be at least tRC.
The entire memory must be refreshed every 32 ms (tREF). This means that this 576Mb device requires 128K refresh cycles at an
average periodic interval of 0.24
μs MAX (actual periodic refresh interval is 32 ms/16K rows/8 = 0.244μs). To improve efficiency,
eight AREF commands (one for each bank) can be launched at periodic intervals of 1.95
μs (32 ms/16K rows = 1.95μs). The Auto
Refresh Cycle diagram illustrates an example of a refresh sequence.
Auto Refresh (AREF) Command
BA
CK
CS
WE
REF
ADDRESS
BANK ADDRESS
Auto Refresh Cycle
AREF
NOP
AREF
BA0
BA3
BA4
CK
CMD
Bank
相關PDF資料 |
PDF描述 |
|---|---|
| GS54180RK | 1 ELEMENT, 18 uH, GENERAL PURPOSE INDUCTOR, SMD |
| GS54180RJ | 1 ELEMENT, 18 uH, GENERAL PURPOSE INDUCTOR, SMD |
| GS54180BL | 1 ELEMENT, 18 uH, GENERAL PURPOSE INDUCTOR, SMD |
| GS54151RL | 1 ELEMENT, 150 uH, GENERAL PURPOSE INDUCTOR, SMD |
| GS54151RK | 1 ELEMENT, 150 uH, GENERAL PURPOSE INDUCTOR, SMD |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| GS4576S18GL-24I | 制造商:GSI Technology 功能描述:32MB X 18 SEPARATE I/O - Trays |
| GS4576S18L-24I | 制造商:GSI Technology 功能描述:32MB X 18 SEPARATE I/O - Trays |
| GS4-6 | 制造商:JST Manufacturing 功能描述:CRIMP TERMINAL RING 4MM 制造商:JST Manufacturing 功能描述:CRIMP TERMINAL, RING, 4MM 制造商:JST Manufacturing 功能描述:CRIMP TERMINAL, RING, 4MM; Connector Type:Ring Tongue; Termination Method:Crimp; Stud/Tab Size:4mm; Wire Size AWG Min:12AWG; Wire Size AWG Max:10AWG; SVHC:No SVHC (19-Dec-2012); Cable Diameter Max:3.6mm; Stud Size:4mm; Wire Area Size;RoHS Compliant: Yes |
| GS4-6 BR TIN | 制造商:STIMPSON 功能描述: |
| GS4-6 BRASS | 制造商:STIMPSON 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。