we use DDR3 PHY Calc v10.xlsx calcaute c6657 ddr sw leveling parameter,our c6657 has two K4B1G1646G make up 32bit data width,
the question is:
1、we only use one ck(CK0P,CK0N),four DQS(DQSP0~DQSP3,DQSN0~DQSN3),but the excel has eight CK and DQS,how do i fill out ;
2、what Microstrip length and Stripline length mean,I measure the length of the line fill in whitch column?
| Microstrip length (inches) | Stripline length (inches) | ||
| DQS0 | 0.000 | 1.325 | |
| CK_0 | 0.000 | 2.316 | |
| DQS1 | 0.000 | 1.140 | |
| CK_1 | 0.000 | 2.316 | |
| DQS2 | 0.000 | 0.929 | |
| CK_2 | 0.000 | 2.826 | |
| DQS3 | 0.000 | 0.995 | |
| CK_3 | 0.000 | 2.826 | |
| DQS4 | 0.000 | 1.122 | |
| CK_4 | 0.000 | 3.785 | |
| DQS5 | 0.000 | 0.711 | |
| CK_5 | 0.000 | 3.785 | |
| DQS6 | 0.000 | 1.207 | |
| CK_6 | 0.000 | 4.296 | |
| DQS7 | 0.000 | 1.209 | |
| CK_7 | 0.000 | 4.296 | |
| DQS_ECC | 0.000 | 1.073 | |
| CK_ECC | 0.000 | 3.300 |
