Glossary-2
MC92603 Quad Gigabit Ethernet Transceiver Reference Manual
MOTOROLA
Gigabit media independent interface (GMII). The interface between the
reconciliation sublayer and the physical coding sublayer (PCS) for a
100 Mbps operation.
I
Inter-packet gap (IPG). The delay or time gap in between CSMA/CD
packets. The delay provides interframe recovery time for other
CSMA/CD sublayers and for the physical medium.
Inter Symbol Interference (ISI). Inter Symbol Interference, a distortion
caused by the high-frequency loss characteristics of the transmission
media.
L
Least-significant bit (lsb). The bit of the least value in an address, register,
data element, or instruction encoding.
M
Medial access controller (MAC). The data link sublayer that is responsible
for transferring data to and from the physical layer.
N
Negated. Indicates inactive state of signal has been set. Refers to either
inputs or outputs.
P
Physical coding sublayer (PCS). PCS is defined as part of a sublayer in the
IEEE Std. 802.3-2002 [4]. The PCS sublayer encodes data bits into
code-groups that can be transmitted over the physical medium. It is
used to coup the Media Independent Interface (MII) and
Phase Locked Loop (PLL).
Physical medium attachment (PMA) sublayer. The PMA is defined as part
of a sublayer in the IEEE Std. 802.3-2002 [4]. The PMA is part of the
physical layer that provides transmission, reception, collision
detection, clock recovery, and skew alignment.
Parts per million (ppm).
R
Reduced Gigabit Media Independent Interface (RGMII). The reduced
interface between the reconciliation sublayer and the physical coding
sublayer (PCS). The interface is reduced from 8-bit wide to 4-bit
wide and data transfer is DDR.
Summary of Contents for MC92603
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