MPC8321EVRADDC datasheet(22/82 Pages) FREESCALE

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MPC8323E PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 4

Freescale Semiconductor

Ethernet and MII Management

Figure 8 provides the AC test load.

Figure 8. AC Test Load

Figure 9 shows the MII receive AC timing diagram.

Figure 9. MII Receive AC Timing Diagram

8.2.2

RMII AC Timing Specifications

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

RX_CLK clock fall time

tMRXF

1.0

—

4.0

Note:

1. The symbols used for timing specifications follow the pattern of t(first two letters of functional block)(signal)(state)(reference)(state) for

inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tMRDVKH symbolizes MII receive

timing (MR) with respect to the time data input signals (D) reach the valid state (V) relative to the tMRX clock reference (K)

going to the high (H) state or setup time. Also, tMRDXKL symbolizes MII receive timing (GR) with respect to the time data input

signals (D) went invalid (X) relative to the tMRX clock reference (K) going to the low (L) state or hold time. Note that, in general,

the clock reference symbol representation is based on three letters representing the clock of a particular functional. For

example, the subscript of tMRX represents the MII (M) receive (RX) clock. For rise and fall times, the latter convention is used

with the appropriate letter: R (rise) or F (fall).

Table 24. MII Receive AC Timing Specifications (continued)

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

Parameter/Condition

Symbol1

Min

Typical

Max

Unit

Output

Z0 = 50 Ω

OVDD/2

RL = 50 Ω

RX_CLK

RXD[3:0]

tMRDXKH

tMRX

tMRXH

tMRXR

tMRXF

RX_DV

RX_ER

tMRDVKH

Valid Data

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