MPC8321EVRADDC datasheet(24/82 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 11 provides the AC test load.

Figure 11. AC Test Load

Figure 12 shows the RMII receive AC timing diagram.

Figure 12. RMII Receive AC Timing Diagram

8.3

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, and RMII are specified in Section 8.1, “Ethernet Controller (10/100 Mbps)—MII/RMII Electrical

Characteristics.”

REF_CLK clock fall time VIH(max) to VIL(min)

tRMXF

1.0

—

4.0

Note:

1. The symbols used for timing specifications follow the pattern of t(first three 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, tRMRDVKH symbolizes RMII

receive timing (RMR) with respect to the time data input signals (D) reach the valid state (V) relative to the tRMX clock

reference (K) going to the high (H) state or setup time. Also, tRMRDXKL symbolizes RMII receive timing (RMR) with respect to

the time data input signals (D) went invalid (X) relative to the tRMX 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 tRMX represents the RMII (RM) reference (X) clock. For rise and fall times, the latter

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

Table 26. RMII 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

REF_CLK

RXD[1:0]

tRMRDXKH

tRMX

tRMXH

tRMXR

tRMXF

CRS_DV

RX_ER

tRMRDVKH

Valid Data

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