NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 166

• Manufacturer Part Number: NS7520B-1-I46
• Description: IC ARM MICROPROCESSOR 177BGA
• Manufacturer: Digi International
• Series: NET+ARM®r

Specifications of NS7520B-1-I46

• Applications: Network Processor
• Core Processor: ARM7
• Program Memory Type: External Program Memory
• Controller Series: -
• Ram Size: External
• Interface: EBI/EMI, Ethernet, DMA, SPI, UART
• Number Of I /o: 16
• Voltage - Supply: 1.4 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 177-LFBGA
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MAC module block diagram
1 5 4
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:
The 10/100 Mbps Ethernet MAC can be connected to the following devices through
the MII:
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.
Figure 23 shows the MAC block and associated hierarchy, containing three main
modules:
10/100 Mbps Ethernet MAC
MII interface
MII management function
Optional 100 Mbps physical coding sublayer (PCS)
Optional 10 Mbps ENDEC interface
Address filtering
10/100 Mbps PHY
100 Mbps TP-PMD
10 Mbps ENDEC
TFUN. Transmit function.
RFUN. Receive function.
MCS. MAC control sublayer.
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