7-4
MC92603 Quad Gigabit Ethernet Transceiver Reference Manual
MOTOROLA
AC Electrical Characteristics
7.3
AC Electrical Characteristics
The figures and tables in the following sections describe the AC electrical characteristics
of MC92603. All specifications stated are for T
j
= –
40
°
to 105
°
C, V
DD
=
AV
DD
=
XV
DD
=
1.65 to 1.95 V, V
DDQ
=
3.0 to 3.6 V
7.3.1
Transmitter Interface Timing
The transmitter data interface may be configured in any of eight different application modes
as described in Section 2.2, “Transmitter Interface Signals,” and Table 2-2. The 8- and
10-bit interface mode timing is non-double data rate (non-DDR); the input data is sampled
and stored on the rising edge of the transmit interface clock XMIT_x_CLK.
When operating in the reduced 4- or 5-bit backplane, or RGMII/RTBI Ethernet modes, the
interface is double data rate (DDR) and the data is sampled and stored on both the rising
and falling edges of the transmit interface clock XMIT_x_CLK.
The following two sections show the timing diagrams and specifications for the transmitter
in the non-DDR and DDR configurations.
7.3.1.1
Transmitter Interface, Non-DDR Timing
Figure 7-1 provides the transmitter interface non-DDR interface timing diagram.
Figure 7-1. Transmitter Interface, Non-DDR Timing Diagram
T
2
XMIT_x_CLK
XMIT_x_7–0
XMIT_x_K
XMIT_x_ERR
XMIT_x_ENABLE
T
1
Summary of Contents for MC92603
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