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参数资料
| 型号： | EP9307-IRZ |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 14/16页 |
| 文件大小： | 0K |
| 描述： | IC ARM9 SOC ARM920T 272TFBGA |
| 标准包装： | 119 |
| 系列： | EP9 |
| 核心处理器： | ARM9 |
| 芯体尺寸： | 16/32-位 |
| 速度： | 200MHz |
| 连通性： | EBI/EMI，以太网，I²C，IrDA，键盘/触摸屏，SPI，UART/USART，USB |
| 外围设备： | AC'97，DMA，I²S，LCD，LED，MaverickKey，POR，PWM，WDT |
| 输入/输出数： | 14 |
| 程序存储器类型： | ROMless |
| RAM 容量： | 32K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.65 V ~ 3.6 V |
| 数据转换器： | A/D 8x12b |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 272-TFBGA |
| 包装： | 托盘 |
| 配用： | 598-1133-ND - KIT DEVELOPMENT EP9307 ARM9 |
| 其它名称： | 598-1256 |
ER667E2B
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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相关代理商/技术参数 |
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| EP9307-IRZR | 功能描述:微处理器 - MPU IC Universal Platfrm ARM9 SOC Prcessor RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| EP9308 | 制造商:PCA 制造商全称:PCA ELECTRONICS INC. 功能描述:14 Pin DIP 5 Tap Low-Profile TTL Compatible Active Delay Lines |
| EP9309 | 制造商:PCA 制造商全称:PCA ELECTRONICS INC. 功能描述:14 Pin DIP 5 Tap Low-Profile TTL Compatible Active Delay Lines |
| EP930IQZ | 制造商:undefined 功能描述: |
| EP9310 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Tapped Delay Line |
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