i.MX Processors中的主题 Re: IMXRT1024-EVK Ethernet CRS Routing

IMXRT1024-EVK Ethernet CRS Routing

GUnderdown — Thu, 08 Jun 2023 15:31:00 GMT

On the EVK for the xx1024, the schematic shows the ENET_CRS_DV pin being routed from the PHY (U11) to the CPU on pin 97 (GPIO_AD_B0_11). The reference manual (p261) says that the ENET_CRS signal must be routed to GPIO_EMC_34.

Is this an error in the eval board? Which pin should this signal be routed to?

Re: IMXRT1024-EVK Ethernet CRS Routing

Hui_Ma — Mon, 12 Jun 2023 07:03:06 GMT

Hi,

From RT1024 reference manual page1734 Table 37-44 ENET External Signals description:

ENET_CRS (GPIO_EMS_34 pad) signal only works for MII mode:

RT1024 EVK board ENET works at RMII mode, which using RX_EN (GPIO_AD_B0_11 pad) signal as CRS_DV input signal.

So, the RT1024 EVK board ENET_CRS_DV connection is correct.

best regards,

Mike