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参数资料
| 型号： | EP9307-IRZ |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 4/16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 |
12
ER667E2B
Description 7
The coprocessor can incorrectly update one of its destination accumulators even if the coprocessor
instruction should not have been executed or is canceled by the ARM processor. This error can occur if the
following is true:
1) The first instruction must be a coprocessor compare instruction, one of cfcmp32, cfcmp64, cfcmps, and
cfcmpd.
2) The second instruction:
- has an accumulator as a destination3.
- does not execute1.
Example 1: In this case the second instruction may modify a2 even if the condition is not matched.
cfcmp32
r15, c0, c5
cfmva64ne
a2, c8
Example 2: In this case the second instruction may modify a2 even if an interrupt or exception causes it to
be canceled and re-executed after the interrupt/exception handler returns.
cfcmp32
r15, c0, c5
cfmadda
a2, a2, c0, c1
Workaround
The workaround for this issue is to insure that at least one other instruction appears between these
instructions. For example, possible fixes for the instructions sequences above are:
cfcmp32
r15, c0, c5
nop
cfmva64ne
a2, c8
and
cfcmp32
r15, c0, c5
nop
cfmadda
a2, a2, c0, c1
Description 8
If a data abort occurs on an instruction preceding a coprocessor data path instruction that writes to one of
the accumulators3, the accumulator may be updated even though the instruction was canceled.
For example:
str
r7, [r0, #0x1d]
; assume this causes a data abort
cfmadda32
a0, a2, c0, c1
The second instruction will update a0 even though it should be canceled due to the data abort on the
previous instruction.
(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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