MPC8349EVVALDB datasheet(22/87 Pages) FREESCALE

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MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 13

Freescale Semiconductor

Ethernet: Three-Speed Ethernet, MII Management

7.2

DUART AC Electrical Specifications

Table 22 provides the AC timing parameters for the DUART interface of the MPC8349EA.

Ethernet: Three-Speed Ethernet, MII Management

This section provides the AC and DC electrical characteristics for three-speeds (10/100/1000 Mbps) and

MII management.

8.1

Three-Speed Ethernet Controller

(TSEC)—GMII/MII/TBI/RGMII/RTBI Electrical Characteristics

The electrical characteristics specified here apply to gigabit media independent interface (GMII), the

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

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

(MDIO) and management data clock (MDC). The MII, GMII, and TBI interfaces are defined for 3.3 V,

and the RGMII and RTBI interfaces are defined for 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 8.3,

“Ethernet Management Interface Electrical Characteristics.”

High-level output voltage, IOH = –100 μAVOH

OVDD – 0.2

—

Low-level output voltage, IOL = 100 μAVOL

—0.2

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)

Parameter

Symbol

Min

Max

Unit

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