ZYNQ 7020 PS feature 解读

1. IOP: I/O peripheral, 是内部的逻辑引擎。

指得是那些如那些单片机的外围接口，如串口，SPI， CAN， USB德国。

IOP peripherals communicate to external devices through a shared pool of up to 54 dedicated multiuse I/O (MIO) pins. Each peripheral can be assigned one of several pre-defined groups of pins, enabling a flexible assignment of multiple devices simultaneously. Although 54 pins are not enough for simultaneous use of all the I/O peripherals, most IOP interface signals are available to the PL, allowing use of standard PL I/O pins when powered up and properly configured. All MIO pins support 1.8V HSTL and LVCMOS standards as well as 2.5V/3.3V standards.

2.? MIO, multise IO, 如单片机的复用接口（给IOP和memor用）。

? ? ? ? 2.1，是物理的接口，也就是上面的外部功能（UART, CAN）功能通过类似选择器的功能连接到MIO。

? ? ? ? 2.2，对于ZYNQ7020，只用54个IO，假如引脚不够用，可以通过EMIO了解到PL

3. PS-PL Interface

? ? ? ? EMIO,?AMBA? AXI, DMA , Clock, JTAG