A. The EMAC and switch implemented in the AM3358-EP device supports internal delay mode, but timing closure was not performed for this mode of operation. Therefore, the AM3358-EP device does not support internal delay mode.
B. Data and control information is transmitted using both edges of the clocks. RGMII[x]_TD[3:0] carries data bits 3-0 on the rising edge of RGMII[x]_TCLK and data bits 7-4 on the falling edge of RGMII[x]_TCLK. Similarly, RGMII[x]_TCTL carries TXEN on rising edge of RGMII[x]_TCLK and TXERR of falling edge of RGMII[x]_TCLK.
Figure 7-16 RGMII[x]_TD[3:0], RGMII[x]_TCTL Timing - RGMII Mode