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參數(shù)資料
| 型號： | EP9307-CR |
| 廠商： | Cirrus Logic Inc |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ARM920T MCU 200MHZ 272-TFBGA |
| 標(biāo)準(zhǔn)包裝： | 119 |
| 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-TFBGA |
| 包裝： | 托盤 |
| 配用： | 598-1133-ND - KIT DEVELOPMENT EP9307 ARM9 |
| 其它名稱： | 598-1254 |
2
ER667E2B
Analog Touch Screen
Description
After power-on-reset, PENSTS in AR_SETUP2 register has the correct default value of “0”. But after the first
touch on the screen, PENSTS is stuck at “1” regardless if the screen is pressed or not.
Workaround
Configure the hardware so that as long as there is pressure on the touch surface, interrupts will occur
periodically. This is done by setting the register ARXYMAXMIN so that the MIN values are 0x0 and the MAX
values are 0xff. This causes the hardware to believe that while there is pressure on the surface, the pointing
device is always moving. The frequency of interrupts is programmable in TSSETUP by adjusting the settling
times and number of samples taken for each point. If a touch event takes longer than this time to occur, it
is assumed that the touch surface has been released. For an example of this implementation, please see
the source code provided with our Linux and WinCE Touch Screen drivers.
Ethernet
Description 1
The Ethernet controller does not correctly receive frames that have a size of 64 bytes.
Workaround
In order to receive frames of 64 bytes, enable the RCRCA bit in RxCTL. This will prevent the Ethernet
controller from discarding the 64-byte-long frames.
Description 2
When there is inadequate AHB bus bandwidth for data to be transferred from the Ethernet controller FIFO
to the receive descriptor, the Ethernet FIFO will overflow and cause the Ethernet controller to fail to receive
any more packets.
This problem will also occur if the processor is too busy to service incoming packets in a timely manner. By
the time that new receive descriptors are available, the data in the FIFO will contain frames that are
corrupted.
It is the job of the system designer to ensure that there is adequate bandwidth for the applications being run.
Workaround
This is a rare occurrence, however at a system level it is important to reserve adequate bandwidth for the
Ethernet controller. This can be accomplished by some of the following:
- Reducing the bandwidth use of other bus masters in the system.
- Lowering Ethernet rate to half duplex or 10Mbit if higher bandwidth is not required.
- Ensuring that the Ethernet controller receive descriptor processing is given a high enough priority to
ensure that the controller never runs out of receive descriptors.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EP9307-CR/E1 | 制造商:Cirrus Logic 功能描述: |
| EP9307-CRR | 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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| EP9307CRZ | 制造商:Cirrus Logic 功能描述: |
| EP9307-CRZ | 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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| EP9307-CRZR | 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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
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