RELIANCE S-D4007-E数字量输入卡件
1.产 品 介 绍
品牌：RELIANCE
型号说明：RELIANCE S-D4007-E数字量输入卡件
优势：供应进口原装正品，专业停产配件。
公司主营特点：主营产品各种模块/卡件，控制器，触摸屏，伺服驱动器。
2.产 品 详 情 资 料：
RELIANCE S-D4007-EEPROM/闪存周期时间EPROM/闪光周期时间可编程为3至10个总线时钟/字节（4字节=12至40）。（实际循环时间可能会根据设备速度而变化。）数据传输为32位宽。请参阅RELIANCE S-D4007-E嵌入式控制器编程器参考指南。SCSI传输RELIANCE S-D4007-E嵌入式控制器包括一个带DMA控制器的SCSI大容量存储总线接口。SCSI DMA控制器使用FIFO缓冲器将8位SCSI总线连接到32位本地总线。FIFO缓冲器允许SCSI DMA控制器以四个长字脉冲串的形式将数据有效地传输到本地总线。这减少了SCSI设备对本地总线的使用。请参阅《MVME162FX嵌入式控制器程序员参考指南》中的MC2芯片编程模型。DMA控制器的传输速率为44MB/秒，32 MHz，奇偶校验关闭，DRAM和读周期交错。假设SCSI总线上的连续传输速率为5MB/sec，则来自SCSI总线的传输将使用12%的本地总线带宽。RELIANCE S-D4007-E
EPROM/Flash Cycle Times The EPROM/flash cycle time is programmable from 3 to 10 bus clocks/byte (4 bytes = 12 to 40). (The actual cycle time may vary depending on the device speed.) The data transfers are 32 bits wide. Refer to the RELIANCE S-D4007-E Embedded Controller Programmer’s Reference Guide.SCSI Transfers The RELIANCE S-D4007-EEmbedded Controller includes an SCSI mass storage bus interface with DMA controller. The SCSI DMA controller uses a FIFO buffer to interface the 8-bit SCSI bus to the 32-bit local bus. The FIFO buffer allows the SCSI DMA controller to efficiently transfer data to the local bus in four longword bursts. This reduces local bus usage by the SCSI device. Refer to the MC2chip Programming Model in the MVME162FX Embedded Controller Programmer’s Reference Guide. The transfer rate of the DMA controller is 44MB/sec at 32 MHz with parity off and interleaved DRAM and read cycles. Assuming a continuous transfer rate of 5MB/sec on the SCSI bus, 12% of the local bus bandwidth is used by transfers from the SCSI bus.RELIANCE S-D4007-E
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