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参数资料
| 型号： | EP9307-IRZ |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 9/16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 |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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