MPC8323ECVRAFDC datasheet(19/80 Pages) FREESCALE

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MPC8323E PowerQUICC™ II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0

Freescale Semiconductor

Ethernet and MII Management

(management data clock). The MII and RMII are defined for 3.3 V. The electrical characteristics for MDIO

and MDC are specified in Section 8.3, “Ethernet Management Interface Electrical Characteristics.”

8.1.1

DC Electrical Characteristics

All MII and RMII drivers and receivers comply with the DC parametric attributes specified in Table 22.

The potential applied to the input of a MII or RMII receiver may exceed the potential of the receiver’s

power supply (that is, a MII driver powered from a 3.6-V supply driving VOH into a MII receiver powered

from a 2.5-V supply). Tolerance for dissimilar MII driver and receiver supply potentials is implicit in these

specifications.

8.2

MII and RMII AC Timing Specifications

The AC timing specifications for MII and RMII are presented in this section.

8.2.1

MII AC Timing Specifications

This section describes the MII transmit and receive AC timing specifications.

8.2.1.1

MII Transmit AC Timing Specifications

Table 23 provides the MII transmit AC timing specifications.

Table 22. MII and RMII DC Electrical Characteristics

Parameter

Symbol

Conditions

Min

Max

Unit

Supply voltage 3.3 V

OVDD

—

2.97

3.63

Output high voltage

VOH

IOH = –4.0 mA

OVDD = Min

2.40

OVDD + 0.3

Output low voltage

VOL

IOL = 4.0 mA

OVDD = Min

GND

0.50

Input high voltage

VIH

——

2.0

OVDD + 0.3

Input low voltage

VIL

—

–0.3

0.90

Input current

IIN

0 V

≤ VIN ≤ OVDD

—±5

μA

Table 23. MII Transmit AC Timing Specifications

At recommended operating conditions with OVDD of 3.3 V ± 10%.

Parameter/Condition

Symbol1

Min

Typical

Max

Unit

TX_CLK clock period 10 Mbps

tMTX

—400

—

TX_CLK clock period 100 Mbps

tMTX

—40

—

TX_CLK duty cycle

tMTXH/tMTX

—

TX_CLK to MII data TXD[3:0], TX_ER, TX_EN delay

tMTKHDX

TX_CLK data clock rise VIL(min) to VIH(max)

tMTXR

1.0

—

4.0

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