Maxim DS33R11 Rmii Interface Transmit Rmii Interface, Transmit Rmii Interface Timing

DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver

13.3 RMII Interface

Table 13-7. Transmit RMII Interface

(Note 1, Figure 13-3)

PARAMETER	SYMBOL		10Mbps			100Mbps		UNITS
		MIN	TYP	MAX	MIN	TYP	MAX
REF_CLK Frequency			50MHz			50MHz
			±50ppm			±50ppm
REF_CLK Period	t1		20			20		ns
REF_CLK Low Time	t2	7		13	7		13	ns
REF_CLK High Time	t3	7		13	7		13	ns
REF_CLK to TXD, TX_EN Delay	t4	5		10	5		10	ns

Note 1: Timing parameters in this table are guaranteed by design (GBD).

Figure 13-3. Transmit RMII Interface Timing

	t1
REF_CLK	t2
	t3
	t4
TXD[1:0]
TX_EN	t4

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