DMN-8600 DVD Recorder System Processor
13-1
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
LSI Logic Confidential
Chapter 13
SDRAM Interface
This chapter describes the SDRAM interface and contains the following
sections:
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Section 13.1, “DRAM Address Map”
•
Section 13.2, “DRAM Address Field Description”
•
Section 13.3, “Supported Number of Simultaneous Banks”
•
Section 13.4, “SDRAM Initialization”
•
•
Section 13.6, “External SDRAM Configuration Register”
•
Section 13.7, “SDRAM Control and Clock Control Registers”
•
Section 13.8, “SDRAM Arbitration and Throttle Registers”
•
The DMN-8600 processor uses a 32-bit memory interface that supports
up to 64 Mbytes of DRAM. The DRAM memory uses two to four 16-bit
wide SDR/DDR DRAMs, or one to two 32-bit wide SDR/DDR DRAMs,
capable of running at 150 MHz, 2.5 V–3.3 V. SDRAM_RAS and
SDRAM_CAS latency and cycle times are programmable to allow for
DRAMs from different vendors at different speeds to be used.
The DMN-8600 supports the following DRAM types, with parameters
listed in Table 13.1:
•
8 Mbytes to 64 Mbytes
•
Three types of DRAM:
–
Single Data Rate Synchronous DRAM (SDR-SDRAM)
–
Double Data Rate Synchronous DRAM (DDR-SDRAM)
–
Double Data Rate Synchronous GRAM (DDR-SGRAM)