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參數(shù)資料
| 型號： | EP9315-CB |
| 廠商： | Cirrus Logic Inc |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ARM920T MCU 200MHZ 352-PBGA |
| 標準包裝： | 40 |
| 系列： | EP9 |
| 核心處理器： | ARM9 |
| 芯體尺寸： | 16/32-位 |
| 速度： | 200MHz |
| 連通性： | EBI/EMI，EIDE，以太網(wǎng)，I²C，IrDA，鍵盤/觸摸屏，PCMCIA，SPI，UART/USART，USB |
| 外圍設備： | AC'97，DMA，I²S，LCD，LED，MaverickKey，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 16 |
| 程序存儲器類型： | ROMless |
| RAM 容量： | 32K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 1.65 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 8x12b |
| 振蕩器型： | 外部 |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 352-BGA |
| 包裝： | 托盤 |
| 配用： | 598-1144-ND - KIT DEVELOPMENT EP9315 ARM9 |
| 其它名稱： | 598-1261 |
ER638E2B
7
Description 1
Under certain circumstances, data in coprocessor registers or in memory may be corrupted. The following
sequence of instructions will cause the corruption:
1) Let the first instruction be both:
- any coprocessor instruction that is not executed1.
- stalled by the coprocessor due to an internal dependency.
2) Let the second instruction be any two-word coprocessor load or store4.
If the second instruction is a load, the upper word in the target register will generally get an incorrect value.
If the second instruction is a store, the word immediately following the second target memory location will
be written; that is, instead of just writing two consecutive 32-bit words (a 64-bit value or a double value) to
memory, a third 32-bit word immediately following this will be written, leading to memory corruption.
Consider a simple example with a store instruction:
cfaddne
c0, c1, c2
; assume this does not execute
cfstr64
c3, [r2, #0x0]
Three words will be written to memory. The correct values will appear at the memory location pointed to by
r2, and r2 + 0x4. Another value will be written at r2 + 0x8.
Consider now an example with a load instruction:
cfaddne
c0, c1, c2
; assume this does not execute
cfldrd
c3, [r2, #0x0]
The final value in c3 will be incorrect. The lower 32 bits will be correct, while the upper 32 bits will be
incorrect.
Finally, consider a case where a branch occurs:
target
cfldrd
c3, [r2, #0x0]
b
target
nop
cfadd
c0, c1, c2
; though in pipeline, this does not execute
Note: The above examples assume that the cfaddne or cfadd would busy-wait (for whatever reason) if
actually executed. If not, the execution of the following instruction would be correct.
(Continued)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EP9315CB/E0 | 制造商:Cirrus Logic 功能描述: |
| EP9315CB/E1 | 制造商:Cirrus Logic 功能描述: |
| EP9315-CBZ | 功能描述:微處理器 - MPU IC Universl Pltform ARM9 SOC Prcessor RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| EP9315-EB | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Enhanced Universal Platform System-on-Chip Processor |
| EP9315-EBZ | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Enhanced Universal Platform System-on-Chip Processor |
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