MPC8572ECLPXATLD datasheet(37/140 Pages) FREESCALE

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MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

Ethernet: Enhanced Three-Speed Ethernet (eTSEC)

Figure 15 shows the TBI transmit AC timing diagram.

Figure 15. TBI Transmit AC Timing Diagram

8.2.4.2

TBI Receive AC Timing Specifications

Table 31 provides the TBI receive AC timing specifications.

Table 31. TBI Receive AC Timing Specifications

At recommended operating conditions with LVDD/TVDD of 2.5/ 3.3 V ± 5%.

Parameter/Condition 3

Symbol 1

Min

Typ

Max

Unit

Clock period for TBI Receive Clock 0, 1

tTRX

—

16.0

—

Skew for TBI Receive Clock 0, 1

tSKTRX

7.5

—

8.5

Duty cycle for TBI Receive Clock 0, 1

tTRXH/tTRX

—

RCG[9:0] setup time to rising edge of TBI Receive Clock 0, 1

tTRDVKH

2.5

—

RCG[9:0] hold time to rising edge of TBI Receive Clock 0, 1

tTRDXKH

1.5

—

Clock rise time (20%-80%) for TBI Receive Clock 0, 1

tTRXR

0.7

—

2.4

Clock fall time (80%-20%) for TBI Receive Clock 0, 1

tTRXF

0.7

—

2.4

Notes:

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, tTRDVKH symbolizes TBI receive

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

to the high (H) state or setup time. Also, tTRDXKH symbolizes TBI receive timing (TR) with respect to the time data input signals

(D) went invalid (X) relative to the tTRX clock reference (K) going to the high (H) state. 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

tTRX represents the TBI (T) receive (RX) clock. For rise and fall times, the latter convention is used with the appropriate letter:

R (rise) or F (fall). For symbols representing skews, the subscript is skew (SK) followed by the clock that is being skewed (TRX).

2. Guaranteed by design.

3. The signals “TBI Receive Clock 0” and “TBI Receive Clock 1” refer to TSECn_RX_CLK and TSECn_TX_CLK pins respectively.

These two clock signals are also referred as PMA_RX_CLK[0:1].

GTX_CLK

TCG[9:0]

tTTXR

tTTX

tTTXH

tTTXR

tTTXF

tTTKHDV

tTTKHDX

tTTXF

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