Datasheet

1 2
MII_RX_CLK
MII_RXD[3:0]
MII_RX_DV
MII_RX_ER
VALID
203
RM57L843
www.ti.com SPNS215C –FEBRUARY 2014–REVISED JUNE 2016
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Peripheral Information and Electrical SpecificationsCopyright © 2014–2016, Texas Instruments Incorporated
7.12 Ethernet Media Access Controller
The Ethernet Media Access Controller (EMAC) provides an efficient interface between the device and the
network. The EMAC supports both 10Base-T and 100Base-TX, or 10 Mbits/second (Mbps) and 100 Mbps
in either half- or full-duplex mode, with hardware flow control and quality of service (QoS) support.
The EMAC controls the flow of packet data from the device to the PHY. The MDIO module controls PHY
configuration and status monitoring.
Both the EMAC and the MDIO modules interface to the device through a custom interface that allows
efficient data transmission and reception. This custom interface is referred to as the EMAC control
module, and is considered integral to the EMAC/MDIO peripheral. The control module is also used to
multiplex and control interrupts.
7.12.1 Ethernet MII Electrical and Timing Specifications
Figure 7-26. MII Receive Timing
Table 7-39. MII Receive Timing
Parameter Description MIN MAX
t
su(GMIIMRXD)
Setup time, GMIIMRXD to GMIIMRCLK rising edge 8ns
t
su(GMIIMRXDV)
Setup time, GMIIMRXDV to GMIIMRCLK rising edge 8ns
t
su(GMIIMRXER)
Setup time, GMIIMRXER to GMIIMRCLK rising edge 8ns
t
h(GMIIMRXD)
Hold time, GMIIMRXD valid after GMIIRCLK rising
edge
8ns
t
h(GMIIMRXDV)
Hold time, GMIIMRXDV valid after GMIIRCLK rising
edge
8ns
t
h(GMIIMRXER)
Hold time, GMIIMRXDV valid after GMIIRCLK rising
edge
8ns