看评估板的代码,#define MT41K256M16HA125E_EMIF_READ_LATENCY 0x100007
bit 9-8 (reg_phy_rd_local_odt)是00即ODT off. 是否意味着CPU收端不用有匹配?
但是,看如下wiki,最后的示例中DQS调用模型是1002,表明是FULL的匹配(对应的reg_phy_rd_local_odt应该是10),这种不一致如何理解?和代码对应的model难道不应该是类似994的么?
processors.wiki.ti.com/.../How_to_use_the_AM335x_IBIS_Models
| DQS | Model_1002 | INPUT,1.5V,FULLTERM, 0.88*RExt,IND,5%,DIFF_VREF_FULLTERM_9MA_5PER_1P5 |
Model_994 INPUT,1.5V,Pull-up/down off,IND,5%,DIFF_VREF_NOTERM_PUPD_OFF_5PER_1P5
谢谢各位support~