参数资料
| 型号： | EP9315-CB |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 5/16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： | 0°C ~ 70°C |
| 封装/外壳： | 352-BGA |
| 包装： | 托盘 |
| 配用： | 598-1144-ND - KIT DEVELOPMENT EP9315 ARM9 |
| 其它名称： | 598-1261 |
ER638E2B
13
Workaround
A complete software workaround requires ensuring that data aborts do not occur due to any instruction
immediately preceding a coprocessor instruction that writes to an accumulator. The only way to ensure this
is to not allow memory operations immediately preceding these types of instructions. For example, the fixes
for the instructions above are:
str
r7, [r0, #0x1d]
; assume this causes a data abort
nop
cfmadda32
a0, a2, c0, c1
Description 9
The coprocessor will erroneously update an accumulator if the coprocessor instruction that updates an
accumulator is canceled and is followed by a coprocessor instruction that is not a data path instruction. This
error will occur under the following conditions:
1) The first instruction:
- must update a coprocessor accumulator3.
- does not execute1.
2) The second instruction is not a coprocessor data path instruction. Coprocessor data path instructions
include any instruction that does not move data to or from memory or to or from the ARM registers.
For example:
cfmva64ne
a2, c3
cfmvr64l
r4, c15
If the first instruction should not execute or is interrupted, it may incorrectly update a2.
Workaround
Because any instruction may be canceled due to an asynchronous interrupt, the most general software
workaround is to insure that no instruction that updates an accumulator is followed immediately by a non-
data path coprocessor instruction. For example, the fix for the instruction sequence above is:
cfmva64ne
a2, c3
nop
cfmvr64l
r4, c15
Description 10
An instruction that writes a result to an accumulator3 may cause corruption of any of the four accumulators
when the coprocessor is operating in serialized mode2.
For example, the following sequence of instructions may corrupt a2 if the second instruction is not executed.
cfmadda32
a0, a2, c0, c1
cfmadda32ne
a2, c3, c0, c1
Workaround
The only workaround for this issue is to operate the coprocessor in unserialized mode.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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:微处理器 - MPU IC Universl Pltform 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 |
| EP9315-EB | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Enhanced Universal Platform System-on-Chip Processor |
| EP9315-EBZ | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Enhanced Universal Platform System-on-Chip Processor |
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