Mac Module; Mac Module Block Diagram - Digi NS7520B-1-C36 Hardware Reference Manual

M A C m o d u l e

MAC module

The MAC component of the NS7520 provides a full function 10/100 Mbps media access
controller module with media independent interface (MII) and optional interface
modules, which include MII, PMD, and ENDEC.
The basic features in the MAC module include:
10/100 Mbps Ethernet MAC
MII interface
MII management function
Optional 100 Mbps physical coding sublayer (PCS)
Optional 10 Mbps ENDEC interface
Address filtering
The 10/100 Mbps Ethernet MAC can be connected to the following devices through
the MII:
10/100 Mbps PHY
100 Mbps TP-PMD
10 Mbps ENDEC
The MAC module also provides MII management and station address logic (SAL). The
SAL block filters the incoming receive addresses, accepting or rejecting individual
and multicast receive packets.

MAC module block diagram

Figure 23 shows the MAC block and associated hierarchy, containing three main
modules:
TFUN. Transmit function.
RFUN. Receive function.
MCS. MAC control sublayer.
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