NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 322

• Manufacturer Part Number: NS7520B-1-C36
• Description: IC ARM MICROPROCESSOR 177BGA
• Manufacturer: Digi International
• Series: NET+ARM®r

Specifications of NS7520B-1-C36

• 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

Station Address Logic: Multicast and broadcast packet filtering
Station Address Logic: Unicast packets
3 1 0
N S 7 5 2 0 e r r a t a
Example
0xffb00010 = 80000001;
0xffb00010 = 80ffffff;
In this way, the two erroneous timeouts will occur with a small value, and the large
value can then be set.
Note:
The station address logic (SAL) in the MAC receiver does not filter multicast and
broadcast packets in a predictable manner.
Workaround
Program the Station Address Filter register (SAFR) fields as shown:
If filtering of multicast and broadcast packets is required, it must be provided by
software.
The station address logic (SAL) in the MAC receiver does not compare the first byte of
the Ethernet destination address against the OCTET6 value in the Station Address
Register 3 (SA3) for unicast packets. As such, the SAL does not reject unicast packets
with mismatches only in this field.
PRO
PRM
PRA
BROAD
Mnemonic
Toggling TE (timer enable) to disable and re-enable the timer does not
eliminate this issue.
N S 7 5 2 0 H a r d w a r e R e f e r e n c e , R e v G 9 / 2 0 0 7
Wait for the first TIP bit. Reset the TIP bit.
Wait for the first TIP bit. Reset the TIP bit.
D03
D02
D01
D00
Bit
0
1
0
1
Value
Disable promiscuous mode
Accept all multicast packets
Disable multicast hash table
Accept all broadcast packets
Description