Texas-instruments TMS320C6454 Manual do Utilizador descarregar pdf (Página 199)

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PRODUCT PREVIEW

RMREFCLK

(Input)

MRXD1-MRXD0,

MCRSDV,

MRXER (Inputs)

TMS320C6454

Fixed-Point Digital Signal Processor

SPRS311A – APRIL 2006 – REVISED DECEMBER 2006

Table 7-83. Timing Requirements for EMAC RMII Input Receive for 100 Mbps

(1)

(see Figure 7-67 )

-720

-850

NO. UNIT

-1000

MIN MAX

Setup time, receive selected signals valid before MREFCLK (at DSP)

1 t

su(MRXD-MREFCLK)

4.0 ns

high/low

2 t

h(MREFCLK-MRXD)

Hold time, receive selected signals valid after MREFCLK (at DSP) high/low 2.0 ns

(1) For RMII, receive selected signals include: MRXD[1:0], MRXER, and MCRSDV.

Figure 7-67. EMAC Receive Interface Timing [RMII Operation]

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Texas-instruments TMS320C6454 Manual do Utilizador Página 199