Datasheet
Electrical characteristics
i.MX 8QuadXPlus and 8DualXPlus Automotive and Infotainment Applications Processors, Rev. 0, 11/2018
PRELIMINARYNXP Semiconductors 71
4.10.4.6 Bus Operation Condition for 3.3 V and 1.8 V Signaling
Signaling level of SD/eMMC 5.1 and eMMC 5.1 modes is 3.3 V. Signaling level of SDR104/SDR50 mode
is 1.8 V. The DC parameters for the NVCC_SD1, NVCC_SD2, and NVCC_SD3 supplies are identical to
those shown in “,” and Table 26, "Dual-voltage GPIO 3.3V DC parameters (IO PSW is set to 1.8 V
Range)," on page 33Table 27, "Dual-voltage GPIO 3.3 V DC parameters (IO PSW is set to 3.3 V range),"
on page 34.
4.10.5 Ethernet Controller (ENET) AC Electrical Specifications
ENET interface supporting RGMII protocol in delay and non-delay mode. RGMII is used to support up to
1000 Mbps Ethernet as well as RMII protocol. RMII is used to support up to 100 Mbps Ethernet.
NOTE
Both ENET0 and ENET1 support RGMII at 1.8 V and 2.5 V, and RMII at
3.3 V.
Table 62. RGMII/RMII pin mapping
Pin name
1
1
x
can be 0 or 1.
RGMII RMII Comment
2
2
Except for RCLK50M and RMII_RXER, all other RMII functions are using the same pin muxing mode as RGMII.
ENETx_RGMII_TXC RGMII_TXC RCLK50M RCLK50M can be an input or
an output. It's using different
Alternate pin muxing modes.
Refer to pin muxing for details.
ENET
x
_RGMII_TX_CTL RGMII_TX_CTL RMII_TXEN —
ENET
x
_RGMII_TXD0 RGMII_TXD0 RMII_TXD0 —
ENET
x
_RGMII_TXD1 RGMII_TXD1 RMII_TXD1 —
ENET
x
_RGMII_TXD2 RGMII_TXD2 N/A —
ENET
x
_RGMII_TXD3 RGMII_TXD3 N/A —
ENET
x
_RGMII_RXC RGMII_RXC N/A —
ENET
x
_RGMII_RX_CTL RGMII_RX_CTL RMII_CRS_DV —
ENET
x
_RGMII_RXD0 RGMII_RXD0 RMII_RXD0 —
ENET
x
_RGMII_RXD1 RGMII_RXD1 RMII_RXD1 —
ENET
x
_RGMII_RXD2 RGMII_RXD2 RMII_RXER RMII_RXER is mapped on
ALT1 mode of pin muxing.
ENET
x
_RGMII_RXD3 RGMII_RXD3 N/A —
ENET
x
_REFCLK_125M_25M RGMII_REF_CLK N/A —
ENET
x
_MDIO RGMII_MDIO RMII_MDIO —
ENET
x
_MDC RGMII_MDC RMII_MDC —