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參數(shù)資料
| 型號(hào)： | EP9315-CB |
| 廠商： | Cirrus Logic Inc |
| 文件頁(yè)數(shù)： | 3/16頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC ARM920T MCU 200MHZ 352-PBGA |
| 標(biāo)準(zhǔn)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(wǎng)，I²C，IrDA，鍵盤/觸摸屏，PCMCIA，SPI，UART/USART，USB |
| 外圍設(shè)備： | AC'97，DMA，I²S，LCD，LED，MaverickKey，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 16 |
| 程序存儲(chǔ)器類型： | ROMless |
| RAM 容量： | 32K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 1.65 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 8x12b |
| 振蕩器型： | 外部 |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 352-BGA |
| 包裝： | 托盤 |
| 配用： | 598-1144-ND - KIT DEVELOPMENT EP9315 ARM9 |
| 其它名稱： | 598-1261 |
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ER638E2B
11
Note: The effect of branches should also be accounted for, as it is the instruction stream as seen by the
coprocessor that matters, not the order of instructions in the source code. To avoid this error when entering
exception and interrupt handlers, the first seven instruction in an interrupt or exception handler should not
be a coprocessor instructions.
Description 5
When operating in serialized mode2, cfrshl32 and cfrshl64 do not work properly. The instructions shift by an
unpredictable amount, but cause no other side effects.
Workaround
One workaround is to avoid these instructions. With this approach, an alternative instruction sequence may
accomplish the shift with the following steps:
- Move the data to be shifted to ARM register(s)
- Shift the data using non-coprocessor instructions
- Move the shifted data back to the coprocessor.
Another workaround is to never operate in serialized mode. With this approach, synchronous exceptions are
not possible.
Description 6
If an interrupt occurs during the execution of cfldr32 or cfmv64lr, the instruction may not sign extend the
result correctly.
Either instruction places a 32 bit value into the lower half of one of the coprocessor general purpose registers
c0 through c15 and sign extends the high (32nd) bit through the upper half of the register. If an IRQ or FIQ
to the ARM processor interrupts either of these instructions at the right time, the coprocessor will properly
load the low 32 bits of the target register, but instead of sign extending it will replicate the low 32 bit into the
upper 32 bits. Code that depends on sign extension will fail to operate correctly.
Workaround
Possible workarounds include:
- Disable interrupts when executing cfldr32 or cfmv64lr instructions.
- Avoid executing these two instructions.
- Do not depend on the sign extension to occur; that is, ignore the upper word in any calculations
involving data loaded using these instructions.
- Add extra code to sign extend the lower word after it is loaded by explicitly forcing the upper word
to be all zeroes or all ones, as appropriate. It is possible to do this selectively in exception or interrupt
handler code. If the instruction preceding the interrupted instruction can be determined, and it is a
cfldr32 or cfmv64lr, the instruction may be re-executed or explicitly sign extended before returning
from interrupt or exception.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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:微處理器 - MPU IC Universl Pltform ARM9 SOC Prcessor RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| EP9315-EB | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Enhanced Universal Platform System-on-Chip Processor |
| EP9315-EBZ | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Enhanced Universal Platform System-on-Chip Processor |
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