Nvidia DG-04927-001_V01 Manuel D’Utilisation

Tegra 200 Series Developer Board User Guide

 

DG-04927-001_v01

 

Advance Information – Subject to Change 

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NVIDIA CONFIDENTIAL

 

Tegra 250 supports standard DDR2 SDRAM.  Up to 1GB total memory, two chip selects and two Clock Enables are supported.  
A full 8-device configurations using x8 DDR2 devices is shown.  A 4 device configuration is possible and is a subset of the 8 
device configuration.  Only Rank 0 would be used in this case. 

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Four Devices are routed in parallel to form single 32-bit memory Rank (1 Chip Select, 1 Clock Enable) 

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CLK+/-, Address, BA, RAS/CAS/WR, CKE0, CS0 and ODT0 are routed to all devices (4 loads) 

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DQ[31:0], DQS[3:0]+/-, DQM[3:0] are routed to one device each (1 load) 

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Two Ranks of four devices each form two 32-bit memory Ranks (2 Chip Selects, 2 Clock Enables) 

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CLK+/-, Address, BA, RAS/CAS/WR and ODT0 are routed to all devices (8 loads) 

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CKE[1:0] and CS0[1:0]_N are routed to 4 devices each (4 loads) 

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DQ[31:0], DQS[3:0]+/-, DQM[3:0] are routed to 2 devices each (2 loads)