pnx1500 NXP Semiconductors, pnx1500 Datasheet - Page 336

• Manufacturer Part Number: pnx1500
• Description: Pnx15xx Series Connected Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Volume 1 of 1
5. Register Descriptions
PNX15XX_SER_3
Product data sheet
Figure 15:
Figure 16:
command
command
address
address
clk_n
clk_n
bank
bank
Trcd_rd
Trcd_wr
dqs
dqs
clk
clk
dq
dq
Timing Parameter
4.6 Trcd_rd Timing Parameter
4.7 Trcd_wr Timing Parameter
Timing Parameter
Trcd_wr = 2
Trcd_wr = 2
Act
Act
n
n
Figure 15
Figure 16
The DDR SDRAM Controller contains a number of MMIO registers that are used to:
•
•
•
•
Trcd_rd = 4
set generic control and read generic status information
set dimensions of the DDR memories
set timing characteristics of the DDR memories
set arbitration parameters
Write
n
shows a Trcd_rd of 4 cycles.
shows a Trcd_wr of 2 cycles.3.2 Asynchronous Reset Synchronization
Rev. 3 — 17 March 2006
Read
n
Tcas = 2.5
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Chapter 9: DDR Controller
PNX15xx Series
9-23