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| 型號： | ST20GP1 |
| 英文描述： | MAX 7000 CPLD 256 MC 208-PQFP |
| 中文描述： | GPS處理器 |
| 文件頁數(shù)： | 54/116頁 |
| 文件大?。?/td> | 1107K |
| 代理商： | ST20GP1 |
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ST20-GP1
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Figure 9.3 shows the generic EMI activity during a write access.
notMemOE
is inactive during a
write access, and the function of
notMemWB1
is dictated by the bus width of the bank in the same
way as for a read access.
MemData8-15
is held in high impedance during a write access if the bus
width is 8-bit, otherwise it follows the timing configured for
MemData0-7
.
Figure 9.3 Configuration parameters for a write access
The following caveats relate to strobe edge programming:
If any of the strobe edges are programmed to occur outside the period defined by
Access-
Duration
, the activity for that strobe is undefined.
If a strobe’s rising and falling edges are programmed to occur on the same system clock
edge, they will nullify each other and the strobe will stay in the same state. This rule also
applies for consecutive accesses.
Transactions normally consist of several accesses which run consecutively without any ‘dead
cycles’. The number of accesses in a transaction is dependent on the bus width and the nature of
the memory bus request. Table 9.3 lists the transaction composition and the behavior of
MemAddr1
and
notMemWB0-1
for each access.
MemAddr1-19
notMemWB1
*
(
MemAddr0
)
notMemCE
notMemWB0
MemData0-7
MemData8-15
Access duration
CEe1 time
CEe2 time
WBe1 time
* Only when bus width is 8-bit. When bus width is 16-bit,
notMemWB1
follows the timing
specified for
notMemWB0
.
Held in high impedance when bus width is 8-bit.
WBe2 time
Data drive delay
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST20-GP1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
| ST20GP1X33S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
| ST20GP6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:GPS PROCESSOR |
| ST20-GP6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
| ST20GP6CT33S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
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