MPC8377E datasheet(22/124 Pages) FREESCALE

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MPC8377E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2

Freescale Semiconductor

Ethernet: Enhanced Three-Speed Ethernet (eTSEC)

7.2

DUART AC Electrical Specifications

Table 22 provides the AC timing parameters for the DUART interface of the device.

Ethernet: Enhanced Three-Speed Ethernet (eTSEC)

This section provides the AC and DC electrical characteristics for the enhanced three-speed Ethernet

controller.

8.1

Enhanced Three-Speed Ethernet Controller (eTSEC)

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

Characteristics

The electrical characteristics specified here apply to 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 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.

High-level output voltage,

IOH = –100 μA

VOH

OVDD – 0.2

—

Low-level output voltage,

IOL = 100 μA

VOL

—0.2

Input current,

(0 V

≤VIN ≤ OVDD)

IIN

—±30

μA

Note:

• The symbol VIN, in this case, represents the OVIN symbol referenced in Table 2.

Table 22. DUART AC Timing Specifications

Parameter

Value

Unit

Notes

Minimum baud rate

256

baud

—

Maximum baud rate

> 1,000,000

baud

Oversample rate

—

Notes:

1 Actual attainable baud rate will be limited by the latency of interrupt processing.

2 The middle of a start bit is detected as the 8th sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values are

sampled each 16th sample.

Table 21. DUART DC Electrical Characteristics (continued)

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