Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 7/19/2024
Public

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5.5.6.1. Block Diagram

The combo PHY was designed to operate with high-speed NAND and SD/eMMC Flash devices. The following figure shows the high-level combo PHY block diagram.
Figure 154. Combo PHY Block Diagram

The PHY supports 1:2 clock ratio between the PHY clock (clk_phy) and memory controller clock (clk_ctrl) for NAND Flash. The PHY supports 1:1 clock ratio of the clock frequency between the PHY clock (clk_phy) and memory device interface clock for SD/eMMC. This clock ratio translation is handled by the freq ratio module.

The addr control module is responsible for generating NAND Flash control signals like ALE/CLE/RE/WE/CE. This is also responsible for generating the control signals and SDCLK for SD/eMMC. The data write path module is responsible for transmitting data and generating the data strobe signal (DQS). The data read path module is responsible for recovering the data from the Flash device interface. The combo PHY also has a set of configuration and status registers that are used to set or retrieve the value of parameters that are used during the operations executed over the Flash devices including interface calibration.