MPC8533VTALFB datasheet(33/116 Pages) FREESCALE

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MPC8533E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 3

Freescale Semiconductor

Enhanced Three-Speed Ethernet (eTSEC), MII Management

Figure 16 shows the TBI receive AC timing diagram.

Figure 16. TBI Receive AC Timing Diagram

8.5.3

TBI Single-Clock Mode AC Specifications

When the eTSEC is configured for TBI modes, all clocks are supplied from external sources to the relevant

eTSEC interface. In single-clock TBI mode, when TBICON[CLKSEL] = 1, a 125-MHz TBI receive clock

is supplied on the TSECn_RX_CLK pin (no receive clock is used on TSECn_TX_CLK in this mode,

whereas for the dual-clock mode this is the PMA1 receive clock). The 125-MHz transmit clock is applied

on the TSEC_GTX_CLK125 pin in all TBI modes.

A summary of the single-clock TBI mode AC specifications for receive appears in Table 31.

Table 31. TBI Single-Clock Mode Receive AC Timing Specification

Parameter/Condition

Symbol

Min

Typ

Max

Unit

Notes

RX_CLK clock period

tTRR

7.5

8.0

8.5

—

RX_CLK duty cycle

tTRRH

—

RX_CLK peak-to-peak jitter

tTRRJ

——

250

—

Rise time RX_CLK (20%–80%)

tTRRR

——

1.0

—

Fall time RX_CLK (80%–20%)

tTRRF

——

1.0

—

RCG[9:0] setup time to RX_CLK rising edge

tTRRDV

2.0

—

RCG[9:0] hold time to RX_CLK rising edge

tTRRDX

1.0

—

PMA_RX_CLK1

RCG[9:0]

tTRX

tTRXH

tTRXR

tTRXF

tTRDVKH

PMA_RX_CLK0

tTRDXKH

tTRDVKH

tTRDXKH

tSKTRX

tTRXH

Valid Data

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