Xilinx ML561 manual DDR1RAS,CAS,WEN, DDR1CKE, DDR2ODT10, DDR2RAS,CAS,WEN

Models: ML561

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Chapter 3: Hardware Description

Table 3-3describes all signals associated with DDR400 Component memories.

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Table 3-3:DDR400 Component Signal Summary

Board Signal Name(s)

Bits

Description

 

 

 

DDR1_A[13:0]

14

DDR400 Component Address

 

 

 

DDR1_CK[2:1]_[P,N]

4

DDR400 Component Differential Clock

 

 

 

DDR1_[RAS,CAS,WE]_N, DDR1_CKE,

12

DDR400 Component Control Signals

DDR1_BA[1:0], DDR1_BY[0_1,2_3]_CS_N,

 

 

DDR1_DM_BY[3:0]

 

 

 

 

 

DDR1_DQ_BY0_B[7:0], DDR1_DQS_BY0_P

9

DDR400 Data and Strobe: Byte 0

 

 

 

DDR1_DQ_BY1_B[7:0], DDR1_DQS_BY1_P

9

DDR400 Data and Strobe: Byte 1

 

 

 

DDR1_DQ_BY2_B[7:0], DDR1_DQS_BY2_P

9

DDR400 Data and Strobe: Byte 2

 

 

 

DDR1_DQ_BY3_B[7:0], DDR1_DQS_BY3_P

9

DDR400 Data and Strobe: Byte 3

 

 

 

Notes:

1. DDR1_CKE signal has a weak 4.7KΩ pull-down resistor to meet the memory power-up requirements.

Table 3-4describes all signals associated with DDR2 Component memories. For a complete list of FPGA #1 signals and their pin locations, refer to Appendix A, “FPGA Pinouts.”

Table 3-4:DDR2 Component Signal Summary

Board Signal Name(s)

Bits

Description

 

 

 

DDR2_A[12:0]

13

DDR2 Component Address

 

 

 

DDR2_CK[1:0]_[P,N]

4

DDR2 Component Differential

 

 

Clock

 

 

 

DDR2_ODT[1:0], DDR2_[RAS,CAS,WE]_N,

14

DDR2 Component Control Signals

DDR2_CKE, DDR2_BA[1:0], DDR2_CS[1:0]_N,

 

 

DDR2_DM_BY[3:0]

 

 

 

 

 

DDR2_DQ_BY0_B[7:0], DDR2_DQS_BY0_[P,N]

10

DDR2 Data and Strobe: Byte 0

 

 

 

DDR2_DQ_BY1_B[7:0], DDR2_DQS_BY1_[P,N]

10

DDR2 Data and Strobe: Byte 1

 

 

 

DDR2_DQ_BY2_B[7:0], DDR2_DQS_BY2_[P,N]

10

DDR2 Data and Strobe: Byte 2

 

 

 

DDR2_DQ_BY3_B[7:0], DDR2_DQS_BY3_[P,N]

10

DDR2 Data and Strobe: Byte 3

 

 

 

Notes:

1.DDR2_CKE and DDR2_ODT[1:0] signals have a weak 4.7KΩ pull-down resistor to meet the memory power-up requirements.

XAPP851, DDR SDRAM Controller Using Virtex-5 FPGA Devices, XAPP858, High- Performance DDR2 SDRAM Interface in Virtex-5 Devices, and the corresponding demos are included on the CD shipped with the ML561 Tool Kit. For a complete list of FPGA #1 signals and their pin locations, refer to Appendix A, “FPGA Pinouts.”

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Virtex-5 FPGA ML561 User Guide

 

 

UG199 (v1.2) April 19, 2008

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Xilinx ML561 manual DDR1RAS,CAS,WEN, DDR1CKE, DDR2ODT10, DDR2RAS,CAS,WEN