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參數(shù)資料
| 型號： | EP9307-CRZR |
| 廠商： | Cirrus Logic Inc |
| 文件頁數(shù)： | 6/16頁 |
| 文件大小： | 0K |
| 描述： | IC ARM920T 200MHZ PROC 272 TFBGA |
| 標準包裝： | 500 |
| 系列： | EP9 |
| 核心處理器： | ARM9 |
| 芯體尺寸： | 16/32-位 |
| 速度： | 200MHz |
| 連通性： | EBI/EMI，以太網(wǎng)，I²C，IrDA，鍵盤/觸摸屏，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)： | 14 |
| 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(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： | 272-LFBGA |
| 其它名稱： | Q5809834A |
14
ER667E2B
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EP9307-ERZ | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:ARM9 SOC WITH ETHERNET USB DISPLAY AND TOUCHSCREEN |
| EP9307-IR | 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(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小: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 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| EP9307-IRR | 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(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小: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 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| EP9307-IRZ | 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(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小: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 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| EP9307-IRZR | 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(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小: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 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324 |
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