SPIO - 4电路板

GY@艳

SPIO - 4电路板通过爱特梅尔SAM3U微控制器是基于一个ARM M3的控制， 32位嵌入式核心。它通过USB接口提供的接口到计算机。The SPIO-4 board is controlled via the Atmel SAM3U micro-controller that is based on an ARM M3, 32-bit embedded core. It provides the interface to the computer via a USB interface. The DUT board interfaces to the SPIO-4 via J6, the GPSI-16/32 connector. The GPSI-16/32 interface provides control, data and power to the DUT board. The interfaces on the GPSI-32 can be I2C, SPI with multiple-device capability, and parallel interface. The dedicated I2C interface on the GPSI-16/32 is primarily for control and DUT identification, while the dedicated SPI interface may be used for control or for data transfer. The I2C interface is derived from the peripheral of the microcontroller. As there can be a wide variety of SPI requirements for DUTs, the SPI interface can be provided via a processor peripheral and over the dedicated SPI lines as shown in this document, or the on-board Xilinx Spartan XC6SLX16 FPGA may be used. In fact, the FPGA may be used to implement DUT interfaces other than SPI – such as high-speed I2C for data purposes and parallel data-plus-clock interfaces. A large external SRAM 8Mx16 is connected to both the processor and the FPGA which is used to provide additional device data storage in case the microcontroller’s or FPGA’s on-board memory is insufficient.