MPC8313VRGDF datasheet(34/100 Pages) FREESCALE

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

Freescale Semiconductor

Ethernet: Three-Speed Ethernet, MII Management

8.5

Ethernet Management Interface Electrical Characteristics

The electrical characteristics specified here apply to MII management interface signals MDIO

(management data input/output) and MDC (management data clock). The electrical characteristics for

MII, RMII, RGMII, SGMII, and RTBI are specified in Section 8.1, “Enhanced Three-Speed Ethernet

Controller (eTSEC) (10/100/1000 Mbps)—MII/RMII/RGMII/SGMII/RTBI Electrical Characteristics.”

8.5.1

MII Management DC Electrical Characteristics

The MDC and MDIO are defined to operate at a supply voltage of 2.5 V or 3.3 V. Table 37 and Table 38

provide the DC electrical characteristics for MDIO and MDC.

TSEC_1588_TRIG_IN pulse width

tT1588TRIGH

× tT1588CLK_MAX

——

Notes:

1.TRX_CLK is the max clock period of eTSEC receiving clock selected by TMR_CTRL[CKSEL]. See the MPC8313E

PowerQUICC™ II Pro Integrated Processor Family Reference Manual, for a description of TMR_CTRL registers.

2. It need to be at least two times of clock period of clock selected by TMR_CTRL[CKSEL]. See the

MPC8313E PowerQUICC™

II Pro Integrated Processor Family Reference Manual, for a description of TMR_CTRL registers.

3. The maximum value of tT1588CLK is not only defined by the value of TRX_CLK, but also defined by the recovered clock. For

example, for 10/100/1000 Mbps modes, the maximum value of tT1588CLK is 3600, 280, and 56 ns, respectively.

Table 37. MII Management DC Electrical Characteristics When Powered at 2.5 V

Parameter

Symbol

Conditions

Min

Max

Unit

Supply voltage (2.5 V)

NVDDA/NVDDB

—

2.37

2.63

Output high voltage

VOH

IOH = –1.0 mA

NVDDA or NVDDB = Min

2.00

NVDDA + 0.3

NVDDB + 0.3

Output low voltage

VOL

IOL = 1.0 mA

NVDDA or NVDDB = Min

VSS – 0.3

0.40

Input high voltage

VIH

—NVDDA or NVDDB = Min

1.7

—

Input low voltage

VIL

—NVDDA or NVDDB = Min

–0.3

0.70

Input high current

IIH

VIN

1 = NV

DDA or NVDDB

—10

μA

Input low current

IIL

VIN = NVDDA or NVDDB

–15

—

μA

Note:

1. Note that the symbol VIN, in this case, represents the LVIN symbol referenced in Table 1 and Table 2.

Table 36. eTSEC IEEE 1588 AC Timing Specifications (continued)

At recommended operating conditions with L/TVDD of 3.3 V ± 5%.

Parameter/Condition

Symbol

Min

Typ

Max

Unit

Notes

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