AM3351 datasheet(122/252 Pages) TI1

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RMII[x]_REFCLK (input)

RMII[x]_RXD[1:0], RMII[x]_CRS_DV,

RMII[x]_RXER (inputs)

RMII[x]_REFCLK

(Input)

122

AM3359, AM3358, AM3357, AM3356, AM3354, AM3352, AM3351

SPRS717J – OCTOBER 2011 – REVISED APRIL 2016

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Peripheral Information and Timings

7.6.1.3

EMAC and Switch RMII Electrical Data and Timing

Table 7-13. Timing Requirements for RMII[x]_REFCLK - RMII Mode

(see Figure 7-10)

NO.

MIN

TYP

MAX

UNIT

tc(REF_CLK)

Cycle time, REF_CLK

19.999

20.001

tw(REF_CLKH)

Pulse duration, REF_CLK high

tw(REF_CLKL)

Pulse duration, REF_CLK low

Figure 7-10. RMII[x]_REFCLK Timing - RMII Mode

Table 7-14. Timing Requirements for RMII[x]_RXD[1:0], RMII[x]_CRS_DV, and RMII[x]_RXER - RMII Mode

(see Figure 7-11)

NO.

MIN

TYP

MAX

UNIT

tsu(RXD-REF_CLK)

Setup time, RXD[1:0] valid before REF_CLK

tsu(CRS_DV-REF_CLK)

Setup time, CRS_DV valid before REF_CLK

tsu(RX_ER-REF_CLK)

Setup time, RX_ER valid before REF_CLK

th(REF_CLK-RXD)

Hold time RXD[1:0] valid after REF_CLK

th(REF_CLK-CRS_DV)

Hold time, CRS_DV valid after REF_CLK

th(REF_CLK-RX_ER)

Hold time, RX_ER valid after REF_CLK

Figure 7-11. RMII[x]_RXD[1:0], RMII[x]_CRS_DV, RMII[x]_RXER Timing - RMII Mode

AM3351 Datasheet(PDF) 122 Page - Texas Instruments

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