RM48L952 Datasheet, PDF (148/156 Pages) Texas Instruments – RM48L952 16/32-Bit RISC Flash Microcontroller

RM48L952
SPNS177 – SEPTEMBER 2011
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5.10 Ethernet Media Access Controller
The Ethernet Media Access Controller (EMAC) provides an efficient interface between 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.
5.10.1 Ethernet MII Electrical and Timing Specifications
MII_MRCLK
1
2
MII_MRXD
MII_MRXDV
MII_MRXER
VALID
t_su(GMIIMRXD)
t_{su(GMIIMRXDV)}
t_{su(GMIIMRXER)}
t_h(GMIIMRXD)
t_h(GMIIMRXDV)
t_h(GMIIMRXER)
Parameter
Figure 5-17. MII Receive Timing
Table 5-23. MII Receive Timing
Description
MIN
Setup time, GMIIMRXD to GMIIMRCLK rising edge
8ns
Setup time, GMIIMRXDV to GMIIMRCLK rising edge
8ns
Setup time, GMIIMRXER to GMIIMRCLK rising edge
8ns
Hold time, GMIIMRXD valid after GMIIRCLK rising
8ns
edge
Hold time, GMIIMRXDV valid after GMIIRCLK rising
8ns
edge
Hold time, GMIIMRXDV valid after GMIIRCLK rising
8ns
edge
MAX
148 Peripheral Information and Electrical Specifications
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