MOTOROLA
Chapter 3. Receiver
3-15
Ethernet Compliant Applications Modes (COMPAT = High)
3.7
Ethernet Compliant Applications Modes
(COMPAT = High)
The following sections discuss Ethernet compliant applications modes as implemented by
the MC92603. Different Ethernet operations and protocols as described in the IEEE Std.
802.3-2002 specification [4], are also discussed.
3.7.1
Interface to Ethernet MAC
The operation of the transceivers in the Ethernet-compatible GMII and TBI modes and the
correlation of the port signal names to the names in the IEEE Std. 802.3-2002 specification
[4] are listed in the following two sections.
3.7.1.1
GMII Operation
Ethernet GMII mode is enabled by negating the TBIE input as low and asserting the
COMPAT input high. When in this mode, the receiver should be connected to a standard
Gigabit Ethernet MAC, as shown in Table 3-9.
Table 3-9. GMII Connection to Standard Ethernet MAC
IEEE Std. 802.3-2002
Signal Name
Function
Direction
(Relative to
MC92603)
Port Name
GTX_CLK
Transmit clock
Input
XMIT_x_CLK
TX_EN
Transmit enable
Input
XMIT_x_ENABLE
TX_ER
Force error on transmitted byte
Input
XMIT_x_ERR
TXD<7:0>
Transmit data
Input
XMIT_x_7:0]
RX_CLK
Receive clock
Output
RECV_x_RCLK
RXD<7:0>
Receive data
Output
RECV_x_[7:0]
RX_ER
Receiver has detected an error
Output
RECV_x_ERR
RX_DV
Receiver has detected data
Output
RECV_x_DV
CRS
Receiver has sensed a carrier
Output
RECV_x_CRS
MDC
Management data clock
Input
MD_CLK
MDIO
Management data input/output
Bidirectional
MD_DATA
The following MAC half-duplex input must be externally pulled up/down as indicated
COL
Receiver has sensed a collision
Pull down
—
The following MC92603 inputs must be externally pulled up/down as indicated
Pull up
Management interface enable
Input
MDIO_EN
Variable (PUP/PUD)
MDIO PHY address
Input
MD_ADR[4:2]
Pull down
Disable disparity based sync event
Input
XMIT_DSYNC
Pull down
Disable unused transmitter input
Input
XMIT_x_K
Pull down
Configuration input—put in 8-bit mode
Input
TBIE
Pull up
Configuration input—put in byte
synchronized mode
Input
BSYNC
Pull down
Configuration inputs—disable word
alignment
Input
WSYNC1 and WSYNC0
Summary of Contents for MC92603
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