MPC8378ECVRALDA datasheet(23/126 Pages) FREESCALE

23 / 126 page

MPC8378E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2

Freescale Semiconductor

Ethernet: Enhanced Three-Speed Ethernet (eTSEC)

clock is not required for this port. Instead, SerDes reference clock is required on L1_SD_REF_CLK and

L1_SD_REF_CLK pins.

Figure 7. 4-Wire AC-Coupled SGMII Serial Link Connection Example

8.2

Enhanced Three-Speed Ethernet Controller (eTSEC)

(10/100/1000 Mbps)—SGMII/MII/RGMII/RTBI/RMII DC Electrical

Characteristics

The electrical characteristics specified here apply to serial gigabit media independent interface (SGMII),

media independent interface (MII), reduced gigabit media independent interface (RGMII), reduced ten-bit

interface (RTBI), reduced media independent interface (RMII) signals, management data input/output

(MDIO) and management data clock (MDC).

The MII and RMII interfaces are defined for 3.3 V, while the RGMII and RTBI interfaces can be operated

at 2.5 V. The SGMII interface conforms to the Serial-GMII Specification Version 1.8 with some

exceptions. The RGMII and RTBI interfaces follow the Reduced Gigabit Media-Independent Interface

(RGMII) Specification Version 1.3. The RMII interface follows the RMII Consortium RMII Specification

Version 1.2.

SGMII SerDes

Interface

Transmitter

SD_TX

SD_RX

SD_TX

SD_RX

Receiver

CTX

SD_RX

Receiver

Transmitter

SD_TX

CTX

MPC8378ECVRALDA Datasheet(PDF) 23 Page - Freescale Semiconductor, Inc