Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 11/27/2024
Public
Document Table of Contents

2.3.4.4. Combo DLL PHY Features

The combo DLL PHY module provides the functions described below.
  • Contains all data registers used to launch data, address, and control signals to the device and the memory controller
  • Controls the off-chip data capture and synchronization logic for the read and write operations from and to the external Flash devices
  • Includes an all-digital DLL for timing
  • Access to PHY registers from the NAND and SD/eMMC controllers for a complete solution under the NAND or SD/eMMC controller driver
  • Supports tuning for SD/eMMC interface using internal FIFO

The PHY supports 1:2 clock ratio between the PHY clock (clk_phy) and memory controller clock (clk_ctrl) for NAND Flash. The combo PHY supports 1:1 clock ratio of the clock frequency between PHY clock (clk_phy) and memory controller clock (clk_ctrl) for the SD/eMMC Flash controller.