MPC8313ECVRGDDB datasheet(21/100 Pages) FREESCALE

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MPC8313E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2.1

Freescale Semiconductor

Ethernet: Three-Speed Ethernet, MII Management

7.2

DUART AC Electrical Specifications

Table 23 provides the AC timing parameters for the DUART interface.

Ethernet: Three-Speed Ethernet, MII Management

This section provides the AC and DC electrical characteristics for three-speed, 10/100/1000, and MII

management.

8.1

Enhanced Three-Speed Ethernet Controller (eTSEC)

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

Characteristics

The electrical characteristics specified here apply to all the media independent interface (MII), reduced

gigabit media independent interface (RGMII), serial gigabit media independent interface (SGMII), and

reduced ten-bit interface (RTBI) signals except management data input/output (MDIO) and management

data clock (MDC). The RGMII and RTBI interfaces are defined for 2.5 V, while the MII interface can be

operated at 3.3 V. The RMII and SGMII interfaces can be operated at either 3.3 or 2.5 V. The RGMII and

RTBI interfaces follow the Hewlett-Packard reduced pin-count interface for Gigabit Ethernet Physical

Layer Device Specification Version 1.2a (9/22/2000). The electrical characteristics for MDIO and MDC

are specified in Section 8.5, “Ethernet Management Interface Electrical Characteristics.”

8.1.1

TSEC DC Electrical Characteristics

All RGMII, RMII, and RTBI drivers and receivers comply with the DC parametric attributes specified in

Table 24 and Table 25. The RGMII and RTBI signals are based on a 2.5-V CMOS interface voltage as

defined by JEDEC EIA/JESD8-5.

Table 23. 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 is 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 24. MII DC Electrical Characteristics

Parameter

Symbol

Conditions

Min

Max

Unit

Supply voltage 3.3 V

LVDDA/LVDDB

—

2.97

3.63

Output high voltage

VOH

IOH = –4.0 mA

LVDDA or LVDDB = Min

2.40

LVDDA + 0.3

LVDDB + 0.3

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