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參數(shù)資料
| 型號： | IDT7015S17GI |
| 廠商： | Integrated Device Technology, Inc. |
| 英文描述： | HIGH-SPEED 8K x 9 DUAL-PORT STATIC RAM |
| 中文描述： | 高速8K的× 9雙端口靜態(tài)RAM |
| 文件頁數(shù)： | 19/20頁 |
| 文件大?。?/td> | 178K |
| 代理商： | IDT7015S17GI |
6.42
IDT7015S/L
High-Speed 8K x 9 Dual-Port Static RAM Military, Industrial and Commercial Temperature Ranges
19
APRIL 04, 2006
semaphore flags. All eight semaphores could be used to divide the Dual-
Port RAMor other shared resources into eight parts. Semaphores can
even be assigned different meanings on different sides rather than being
given a common meaning as was shown in the example above.
Semaphores are a useful formof arbitration in systems like disk
interfaces where the CPU must be locked out of a section of memory during
a transfer and the I/O device cannot tolerate any wait states. With the use
of semaphores, once the two devices has determned which memory area
was “off-limts” to the CPU, both the CPU and the I/O devices could access
their assigned portions of memory continuously without any wait states.
Semaphores are also useful in applications where no memory “WAIT”
state is available on one or both sides. Once a semaphore handshake has
been performed, both processors can access their assigned RAM
D
2954 drw 20
0
D
Q
WRITE
D
0
WRITE
D
Q
SEMAPHORE
REQUEST FLIP FLOP
SEMAPHORE
REQUEST FLIP FLOP
L PORT
R PORT
SEMAPHORE
READ
SEMAPHORE
READ
,
Figure 4. IDT7015 Semaphore Logic
segments at full speed.
Another application is in the area of complex data structures. In this
case, block arbitration is very important. For this application one processor
may be responsible for building and updating a data structure. The other
processor then reads and interprets that data structure. If the interpreting
processor reads an incomplete data structure, a major error condition may
exist. Therefore, some sort of arbitration must be used between the two
different processors. The building processor arbitrates for the block, locks
it and then is able to go in and update the data structure. When the update
is completed, the data structure block is released. This allows the
interpreting processor to come back and read the complete data structure,
thereby guaranteeing a consistent data structure.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IDT7015S17JI | HIGH-SPEED 8K x 9 DUAL-PORT STATIC RAM |
| IDT7015S17PFI | HIGH-SPEED 8K x 9 DUAL-PORT STATIC RAM |
| IDT7015S20GI | HIGH-SPEED 8K x 9 DUAL-PORT STATIC RAM |
| IDT7015S20JI | HIGH-SPEED 8K x 9 DUAL-PORT STATIC RAM |
| IDT7015S20PFI | HIGH-SPEED 8K x 9 DUAL-PORT STATIC RAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IDT7015S17J | 功能描述:IC SRAM 72KBIT 17NS 68PLCC RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標(biāo)準(zhǔn)包裝:45 系列:- 格式 - 存儲器:RAM 存儲器類型:SRAM - 雙端口，異步 存儲容量:128K（8K x 16） 速度:15ns 接口:并聯(lián) 電源電壓:3 V ~ 3.6 V 工作溫度:0°C ~ 70°C 封裝/外殼:100-LQFP 供應(yīng)商設(shè)備封裝:100-TQFP（14x14） 包裝:托盤 其它名稱:70V25S15PF |
| IDT7015S17J8 | 功能描述:IC SRAM 72KBIT 17NS 68PLCC RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標(biāo)準(zhǔn)包裝:45 系列:- 格式 - 存儲器:RAM 存儲器類型:SRAM - 雙端口，異步 存儲容量:128K（8K x 16） 速度:15ns 接口:并聯(lián) 電源電壓:3 V ~ 3.6 V 工作溫度:0°C ~ 70°C 封裝/外殼:100-LQFP 供應(yīng)商設(shè)備封裝:100-TQFP（14x14） 包裝:托盤 其它名稱:70V25S15PF |
| IDT7015S17JB | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:HIGH-SPEED 8K x 9 DUAL-PORT STATIC RAM |
| IDT7015S17JI | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:HIGH-SPEED 8K x 9 DUAL-PORT STATIC RAM |
| IDT7015S17PF | 功能描述:IC SRAM 72KBIT 17NS 80TQFP RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標(biāo)準(zhǔn)包裝:45 系列:- 格式 - 存儲器:RAM 存儲器類型:SRAM - 雙端口，異步 存儲容量:128K（8K x 16） 速度:15ns 接口:并聯(lián) 電源電壓:3 V ~ 3.6 V 工作溫度:0°C ~ 70°C 封裝/外殼:100-LQFP 供應(yīng)商設(shè)備封裝:100-TQFP（14x14） 包裝:托盤 其它名稱:70V25S15PF |
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