Ethernet Compliant Applications Modes (Compat = High) - Motorola MC92603 Reference Manual

Transmitting coded data with the reduced interface mode is shown in Table 2-6. The
transmitter functional operation is the same as discussed above, except the data is entered
on both edges of the transmitter input clock, XMIT_x_CLK.
Table 2-6. Transmitter Inputs for RTBI Operating Mode
Data on Rising Edge of
XMIT_x_CLK
Data bit 4
Data bits 3–0
The 10 bits of uncoded data are entered with the least significant 5 bits on the rising clock
and the most significant bits on the falling clock edge.
2.5 Ethernet Compliant Applications Modes
(COMPAT = High)
The MC92603 Gigabit Ethernet transceiver was designed with the intent to meet the
requirements of IEEE Std 802.3-2002 [4] for 1000BASE-X PHYs.
When the configuration control signal, COMPAT, is high, the MC92603 is in the 'Ethernet
compliant application mode.' In this application mode, the MC92603 transmitters accept
either uncoded data (GMII or RGMII interface), where the input data is encoded internally
by an 8B/10B encoder, or coded data (TBI or RTBI interface), where the input data is
pre-encoded and the internal encoder is bypassed. See Table 2-2 for these interface modes.
Table 2-7 defines the ordered_sets that are associated with the Gigabit Ethernet protocol.
Table 2-7. Gigabit Ethernet Defined Ordered Sets
Code
/C/ Configuration
/C1/ Configuration 1
/C2/ Configuration 2
/I/ IDLE
/I1/ IDLE1
/I2/ IDLE2
/R/ Carrier_Extend
/S/ Start_of_Packet
/T/ End_of_Packet
/V/ Error_Propagation
MOTOROLA

Ethernet Compliant Applications Modes (COMPAT = High)

Data on Falling Edge of
XMIT_x_CLK
Data bits 8–5
Ordered_Set Number of Code-Groups
Encapsulation
Chapter 2. Transmitter
MC92603 Signal Name
Data bit 9
XMIT_x_3/XMIT_x_0
— Alternating /C1/ and /C2/
4 /K28.5/D21.5/Config_Reg
4 /K28.5/D2.2/Config_Reg
— Correcting /I1/, Preserving /I2/
2 /K28.5/D5.6/
2 /K28.5/D16.2/
1 /K23.7/
1 /K27.7/
1 /K29.7/
1 /K30.7/
XMIT_x_ENABLE
Encoding
2-9