3-18
MC92603 Quad Gigabit Ethernet Transceiver Reference Manual
MOTOROLA
Ethernet Compliant Applications Modes (COMPAT = High)
The receiver interface error and status in TBI mode is shown in Table 3-12.
3.7.1.3
Double Data Rate Operation—RGMI and RTBI
Functionally, the double data rate operation (DDR is high) is identical to the previously
mentioned receiver GMII and TBI operating modes. The only difference is at the chip
parallel data interfaces. Data outputs are shared and defined uniquely, depending on each
phase of the output clock (RECV_x_RCLK). The RGMII and RTBI interfaces are shown
in Table 3-13 and Table 3-14, respectively.
Table 3-12. Receiver Interface Error and Status Codes (TBI Mode)
RECV_x_
K
1
1
RECV_x_K is not a standard TBI signal. These errors may be detected by monitoring only the10-bit data field since
the 3 error codes are not valid 10-bit encoded data.
RECV_x_
COMMA
RECV_x_
ERR
RECV_x_
DV
RECV_x_
[7:0]
Priority
2
2
The priority column shows the error that is reported if multiple errors occur at the same time. The lower numbered
priority errors are reported first.
Description
Low
Low
Data[9]
Data[8]
Data[7:0]
6
Normal operation, non-COMMA
code group received.
Low
High
Data[9]
Data[8]
Data[7:0]
5
Normal operation, COMMA (K28.1,
K28.5, or K28.7) code group
received.
High
Don’t care
Don’t care
Don’t care
0x04
3
Overrun
High
Don’t care
Don’t care
Don’t care
0x02
3
Underrun
High
Don’t care
Don’t care
Don’t care
0x00
1
Not byte sync: the receiver is in
start-up or has lost byte alignment
and is searching for alignment.
Table 3-13. Receiver RGMII Interface
Clock Edge
RECV_x_DV
RECV_x_[3:0]
Rising
RX_DV
Data bit [3:0]
Falling
GMII_RX_ER (XOR) GMII_RX_DV
Data bit [7:4]
Table 3-14. Receiver RTBI Interface
Rising Edge of
Clock
RECV_x_COMMA
RECV_x_DV
RECV_x_[3:0]
RECV_x_RCLK
COM_DET
Data bit 4
Data bit [3:0]
RECV_x_RCLK_B
COM_DET
Data bit 9
Data bit [8:5]
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