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參數(shù)資料
| 型號： | HY5PS121623F |
| 英文描述： | 32Mx16|1.8V|8K|D43/D44/D54/D55|DDR II SDRAM - 512M |
| 中文描述： | 32Mx16 | 1.8 | 8K的| D43/D44/D54/D55 |的DDR II內(nèi)存- 512M |
| 文件頁數(shù)： | 54/66頁 |
| 文件大小： | 862K |
| 代理商： | HY5PS121623F |
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Rev. 0.52/Nov. 02 54
HY5PS12423(L)F
HY5PS12823(L)F
HY5PS121623(L)F
Auto Refresh
Auto refresh command executes refresh operation with internal address increment. Auto refresh command is issued by
activating CS, RAS, CAS and deactivating WE at the rising edge of clock. NOP cycle must be inserted during the entire
auto refresh cycle time defined by tRFC. On chip refresh counter is incremented during each refresh cycle. Auto
refresh command must be issued each time a refresh is required. The 512Mb DDR-II SDRAM requires auto refresh
cycles at an average periodic interval of 7.8 us (maximum) and support internal multi-row refresh operation, which
means one auto refresh command executes two internal refresh cycle during tRFC cycle. To allow for improved effi-
ciency in scheduling and switching between tasks, some flexibility in the absolute refresh interval is provided. But, a
maximum of eight auto refresh commands can be posted. Before entering Auto Refresh mode, all banks must be in a
precharge state and Auto refresh command can be issued after tRP period from precharge all command.
/CK
CK
Auto Refresh
CMD
PRE
NOP
Valid
~
~
tRP
tRFC
NOP
NOP
NOP
NOP
NOP
~
NOP
NOP
NOP
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HY5PS121623LF | 32Mx16|1.8V|8K|D43/D44/D54/D55|DDR II SDRAM - 512M |
| HY5PS12423F | 128Mx4|1.8V|8K|D43/D44/D54/D55|DDR II SDRAM - 512M |
| HY5PS12423LF | 128Mx4|1.8V|8K|D43/D44/D54/D55|DDR II SDRAM - 512M |
| HY5PS12823F | 64Mx8|1.8V|8K|D43/D44/D54/D55|DDR II SDRAM - 512M |
| HY5PS12823LF | 64Mx8|1.8V|8K|D43/D44/D54/D55|DDR II SDRAM - 512M |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HY5PS121623LF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:32Mx16|1.8V|8K|D43/D44/D54/D55|DDR II SDRAM - 512M |
| HY5PS12421AF | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:512Mb DDR2 SDRAM |
| HY5PS12421AF-C3 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:512Mb DDR2 SDRAM |
| HY5PS12421AF-C4 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:512Mb DDR2 SDRAM |
| HY5PS12421AF-E3 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:512Mb DDR2 SDRAM |
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