- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98149 > STP1081ABGA-125 SPECIALTY MICROPROCESSOR CIRCUIT, PBGA256 PDF資料下載
參數(shù)資料
| 型號： | STP1081ABGA-125 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PBGA256 |
| 封裝： | PLASTIC, BGA-256 |
| 文件頁數(shù)： | 27/32頁 |
| 文件大?。?/td> | 478K |
| 代理商： | STP1081ABGA-125 |
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頁第22頁第23頁第24頁第25頁第26頁當(dāng)前第27頁第28頁第29頁第30頁第31頁第32頁
4
STP1081
Preliminary
Companion Device for 250/300 MHz UltraSPARC-II Systems
UltraSPARC
-II Data Buffer (UDB-II)
July 1997
TECHNICAL OVERVIEW
Data Buffering
UltraSPARC-II supports multiple outstanding requests to the system. The list below gives details:
Read requests are supported for load/store misses in the E-Cache (P_RDS/P_RDO P_REQ packets on the
UPA):
- up to three outstanding read requests on the UPA with only one outstanding instruction miss (P_RDSA)
- two writeback requests on the UPA
In addition, US-II supports the following requests:
- two block loads (P_RDD/P_NCBRD)
- only one outstanding noncacheable load
UDB-II supports data buffering for up to eight outstanding noncacheable 16-byte stores.
The UDB-II provides three 64-byte read buffers to support the three possible outstanding miss requests.
The UDB-II has two clock domains, one using the UPA clock, the other using a xed 2:1 ratio CPU clock. (For
example: 4 ns US-II CPU clock and 8 ns UDB-II EBUS_CLK.) The ECU and SRAMs communicate with the
UDB-II on a xed 2:1 bus, independent of UPA clock ratio.
64-Byte Buffers
64-byte buffers are provided for reads from the data bus, and for snoops and writebacks from the E-Cache
bus. UDB-II has buffer support for two outstanding writebacks. The writeback buffer is snoopable.
16-Byte Buffers
The UDB-II can hold data for eight noncacheable stores in progress. This store data comes from the store
buffer of the UltraSPARC-II.
The processor makes successive stores to the same 16-byte piece of data to be merged into one 128-bit store.
The MMU E-bit inhibits store merging for pages that cannot tolerate merge due to size or order sensitivity.
Consequently, noncacheable stores may have 128 bits of data, and 16-byte write enables.
8-Byte Buffers
Two mondo vectors, each consisting of three 64-bit packets, are also buffered in the UDB-II. One buffer holds
data going from the UltraSPARC-II to the UPA, while the other holds data going from the UPA to the
UltraSPARC.
Sub-Block Ordering
The UDB-II delivers and receives 16-byte sub-blocks in desired-word-rst order. Subsequent blocks are deliv-
ered in order, wrapping to the beginning of the block, if necessary. UDB-II does no data re-ordering.
All 64-byte write-backs from UltraSPARC-II are delivered starting with sub-block zero. Snoops also return
data with the desired sub-block rst. The UDB-II has the ability to supply pending copyback data in the cor-
rect order for a snoop.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| STP1081ABGA-150 | SPECIALTY MICROPROCESSOR CIRCUIT, PBGA256 |
| STP1091PGA-75 | 2M X 1, CACHE CONTROLLER, CPGA376 |
| STP1100BGA-100 | 32-BIT, 100 MHz, RISC PROCESSOR, PBGA272 |
| STP2001QFP | MULTIFUNCTION PERIPHERAL, PQFP16 |
| STP2011PGA | SPECIALTY MICROPROCESSOR CIRCUIT, PPGA279 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STP1081ABGA-150 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASIC |
| STP1091PGA-75 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Cache Controller |
| STP1091PGA-90 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Cache Controller |
| STP10LN80K5 | 功能描述:MOSFET N-CH 800V 8A TO-220 制造商:stmicroelectronics 系列:MDmesh?? 包裝:管件 零件狀態(tài):有效 FET 類型:MOSFET N 通道，金屬氧化物 FET 功能:標(biāo)準(zhǔn) 漏源極電壓（Vdss）:800V 電流 - 連續(xù)漏極（Id）（25°C 時）:8A（Tc） 不同?Id，Vgs 時的?Rds On（最大值）:630 毫歐 @ 4A，10V 不同 Id 時的 Vgs（th）（最大值）:5V @ 100μA 不同 Vgs 時的柵極電荷（Qg）:15nC @ 10V 不同 Vds 時的輸入電容（Ciss）:427pF @ 100V 功率 - 最大值:110W 工作溫度:-55°C ~ 150°C（TJ） 安裝類型:通孔 封裝/外殼:TO-220-3 供應(yīng)商器件封裝:TO-220 標(biāo)準(zhǔn)包裝:50 |
| STP10N105K5 | 功能描述:MOSFET N-CH 1050V 6A TO-220AB 制造商:stmicroelectronics 系列:MDmesh? K5 包裝:管件 零件狀態(tài):有效 FET 類型:MOSFET N 通道，金屬氧化物 FET 功能:標(biāo)準(zhǔn) 漏源極電壓（Vdss）:1050V（1.05kV） 電流 - 連續(xù)漏極（Id）（25°C 時）:6A（Tc） 不同?Id，Vgs 時的?Rds On（最大值）:1.3 歐姆 @ 3A，10V 不同 Id 時的 Vgs（th）（最大值）:5V @ 100μA 不同 Vgs 時的柵極電荷（Qg）:21.5nC @ 10V 不同 Vds 時的輸入電容（Ciss）:545pF @ 100V 功率 - 最大值:130W 工作溫度:-55°C ~ 150°C（TJ） 安裝類型:通孔 封裝/外殼:TO-220-3 供應(yīng)商器件封裝:TO-220 標(biāo)準(zhǔn)包裝:50 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。