參數資料
| 型號： | EP9315-IB |
| 廠商： | Cirrus Logic Inc |
| 文件頁數： | 5/16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，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： | 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 |
| 數據轉換器： | A/D 8x12b |
| 振蕩器型： | 外部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 352-BGA |
| 包裝： | 托盤 |
| 配用： | 598-1144-ND - KIT DEVELOPMENT EP9315 ARM9 |
| 其它名稱： | 598-1262 |
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| EP9315-IBZ | 功能描述:微處理器 - MPU IC Universal Platfrm ARM9 SOC Prcessor RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數據總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數據 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 |
| EP9316 | 制造商:PCA 制造商全稱:PCA ELECTRONICS INC. 功能描述:14 Pin DIP 5 Tap Low-Profile TTL Compatible Active Delay Lines |
| EP9317 | 制造商:PCA 制造商全稱:PCA ELECTRONICS INC. 功能描述:14 Pin DIP 5 Tap Low-Profile TTL Compatible Active Delay Lines |
| EP9318 | 制造商:PCA 制造商全稱:PCA ELECTRONICS INC. 功能描述:14 Pin DIP 5 Tap Low-Profile TTL Compatible Active Delay Lines |
| EP9319 | 制造商:PCA 制造商全稱:PCA ELECTRONICS INC. 功能描述:14 Pin DIP 5 Tap Low-Profile TTL Compatible Active Delay Lines |
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