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參數(shù)資料
| 型號： | IDT70V26S35G |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | DRAM |
| 英文描述： | HIGH-SPEED 3.3V 16K x 16 DUAL-PORT STATIC RAM |
| 中文描述： | 16K X 16 DUAL-PORT SRAM, 35 ns, CPGA84 |
| 封裝： | CERAMIC, PGA-84 |
| 文件頁數(shù)： | 16/17頁 |
| 文件大?。?/td> | 144K |
| 代理商： | IDT70V26S35G |
6.42
IDT70V26S/L
High-Speed 16K x 16 Dual-Port Static RAM Industrial and Commercial Temperature Ranges
undo its semaphore request and performother tasks until it was able
to write, then read a zero into Semaphore 1. If the right processor
performs a simlar task with Semaphore 0, this protocol would allow the
two processors to swap 8K blocks of Dual-Port RAMwith each other.
The blocks do not have to be any particular size and can even be
variable, depending upon the complexity of the software using the
semaphore flags. All eight semaphores could be used to divide the
Dual-Port RAMor other shared resources into eight parts. Sema-
phores 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 continu-
ously 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 RAMsegments 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 guaran-
teeing a consistent data structure.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IDT70V26S35GI | HIGH-SPEED 3.3V 16K x 16 DUAL-PORT STATIC RAM |
| IDT70V26S35J | HIGH-SPEED 3.3V 16K x 16 DUAL-PORT STATIC RAM |
| IDT70V26S35JI | HIGH-SPEED 3.3V 16K x 16 DUAL-PORT STATIC RAM |
| IDT70V26S55G | HIGH-SPEED 3.3V 16K x 16 DUAL-PORT STATIC RAM |
| IDT70V26S55GI | HIGH-SPEED 3.3V 16K x 16 DUAL-PORT STATIC RAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IDT70V26S35J | 功能描述:IC SRAM 256KBIT 35NS 84PLCC RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:1,000 系列:- 格式 - 存儲器:RAM 存儲器類型:SRAM - 雙端口，同步 存儲容量:1.125M（32K x 36） 速度:5ns 接口:并聯(lián) 電源電壓:3.15 V ~ 3.45 V 工作溫度:-40°C ~ 85°C 封裝/外殼:256-LBGA 供應(yīng)商設(shè)備封裝:256-CABGA（17x17） 包裝:帶卷 (TR) 其它名稱:70V3579S5BCI8 |
| IDT70V26S35J8 | 功能描述:IC SRAM 256KBIT 35NS 84PLCC RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:1,000 系列:- 格式 - 存儲器:RAM 存儲器類型:SRAM - 雙端口，同步 存儲容量:1.125M（32K x 36） 速度:5ns 接口:并聯(lián) 電源電壓:3.15 V ~ 3.45 V 工作溫度:-40°C ~ 85°C 封裝/外殼:256-LBGA 供應(yīng)商設(shè)備封裝:256-CABGA（17x17） 包裝:帶卷 (TR) 其它名稱:70V3579S5BCI8 |
| IDT70V26S55G | 功能描述:IC SRAM 256KBIT 55NS 84PGA RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:3,000 系列:- 格式 - 存儲器:EEPROMs - 串行 存儲器類型:EEPROM 存儲容量:8K (1K x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:1.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:帶卷 (TR) |
| IDT70V26S55J | 功能描述:IC SRAM 256KBIT 55NS 84PLCC RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:1,000 系列:- 格式 - 存儲器:RAM 存儲器類型:SRAM - 雙端口，同步 存儲容量:1.125M（32K x 36） 速度:5ns 接口:并聯(lián) 電源電壓:3.15 V ~ 3.45 V 工作溫度:-40°C ~ 85°C 封裝/外殼:256-LBGA 供應(yīng)商設(shè)備封裝:256-CABGA（17x17） 包裝:帶卷 (TR) 其它名稱:70V3579S5BCI8 |
| IDT70V26S55J8 | 功能描述:IC SRAM 256KBIT 55NS 84PLCC RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝: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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