Altera PHY IP Core Guía de usuario descargar pdf (Pagina 153)

Chapter 9: Timing Diagrams 9–7

DDR3 High-Performance Controllers

December 2010 Altera Corporation External Memory Interface Handbook Volume 3

Section II. DDR3 SDRAM Controller with ALTMEMPHY IP User Guide

The following sequence corresponds with the numbered items in Figure 9–4:

1. The user logic requests write by asserting the

local_write_req

signal.

2. The

local_ready

signal is asserted, indicating that the controller has accepted the

request.

3. The data written to the memory for the write command.

4. The write (WR) command on the command bus.

5. The valid write data on the

ctl_wdata

signal.

6. The valid data on the

mem_dq

signal goes to the controller.

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Altera PHY IP Core Guía de usuario Pagina 153