参数资料
| 型号： | EP9315-IB |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC ARM920T MCU 200MHZ 352-PBGA |
| 标准包装： | 40 |
| 系列： | EP9 |
| 核心处理器： | ARM9 |
| 芯体尺寸： | 16/32-位 |
| 速度： | 200MHz |
| 连通性： | EBI/EMI，EIDE，以太网，I²C，IrDA，键盘/触摸屏，PCMCIA，SPI，UART/USART，USB |
| 外围设备： | AC'97，DMA，I²S，LCD，LED，MaverickKey，POR，PWM，WDT |
| 输入/输出数： | 16 |
| 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： | 352-BGA |
| 包装： | 托盘 |
| 配用： | 598-1144-ND - KIT DEVELOPMENT EP9315 ARM9 |
| 其它名称： | 598-1262 |
14
ER638E2B
Description 11
An erroneous memory transfer to or from any of the coprocessor general purpose registers c0 through c15
can occur given the following conditions are satisfied:
1) The first instruction:
- is a two-word load or store4.
- fails its condition code check.
- does not busy-wait.
2) The second consecutive instruction:
- is a coprocessor load or store.
- is executed.
- does not busy-wait.
When the error occurs, the result is either coprocessor register or memory corruption. Here are several
examples:
cfstr64ne
c0, [r0, #0x0]
; assume does not execute
cfldrs
c2, [r2, #0x8]
; could corrupt c2!
cfldrdge
c0, [r0, #0x0]
; assume does not execute
cfstrd
c2, [r2, #0x8]
; could corrupt memory!
cfldr64ne
c0, [r0, #0x0]
; assume does not execute
cfldrdgt
c2, [r2, #0x8]
; could corrupt c2!
Workaround
The software workaround involves avoiding a pair of consecutive instructions with these properties. For
example, if a conditional coprocessor two-word load or store appears, insure that the following instruction
is not a coprocessor load or store:
cfstr64ne
c0, [r0, #0x0]
; assume does not execute
nop
; separate two instructions
cfldrs
c2, [r2, #0x8]
; c2 will be ok
Another workaround is to insure that the first instruction is not conditional:
cfstr64
c0, [r0, #0x0]
; executes
cfldrs
c2, [r2, #0x8]
; c2 will be ok
Note: If both instructions depend on the same condition code, the error should not occur, as either both or
neither will execute.
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相关代理商/技术参数 |
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|---|---|
| EP9315-IBZ | 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 |
| EP9316 | 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 |
| EP9317 | 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 |
| EP9318 | 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 |
| EP9319 | 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 |
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