MPC8560CPXAPDB datasheet(28/108 Pages) FREESCALE

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MPC8560 Integrated Processor Hardware Specifications, Rev. 3.1

Freescale Semiconductor

Ethernet: Three-Speed, MII Management

Figure 8 provides the AC test load for TSEC.

Figure 8. TSEC AC Test Load

Figure 9 shows the GMII receive AC timing diagram.

Figure 9. GMII Receive AC Timing Diagram

7.2.2 MII AC Timing Specifications

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

RX_CLK clock fall time (80%-20%)

tGRXF

—

1.0

Note:

1.The symbols used for timing specifications herein 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,

tGRDVKH symbolizes GMII receive timing (GR) with respect to the time data input signals (D) reaching the valid state

(V) relative to the tRX clock reference (K) going to the high state (H) or setup time. Also, tGRDXKL symbolizes GMII

receive timing (GR) with respect to the time data input signals (D) went invalid (X) relative to the tGRX 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 tGRX

represents the GMII (G) receive (RX) clock. For rise and fall times, the latter convention is used with the appropriate

letter: R (rise) or F (fall).

2.Guaranteed by design.

Table 21. GMII Receive AC Timing Specifications (continued)

At recommended operating conditions with LVDD of 3.3 V ± 5%.

Parameter/Condition

Symbol 1

Min

Typ

Max

Unit

Output

LVDD/2

RL = 50 Ω

Z0 = 50 Ω

RX_CLK

RXD[7:0]

tGRDXKH

tGRX

tGRXH

tGRXR

tGRXF

tGRDVKH

RX_DV

RX_ER

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