DP83905AVQB National Semiconductor, DP83905AVQB Datasheet - Page 39

• Manufacturer Part Number: DP83905AVQB
• Description: IC CONTROLR AT/LAN TP IN 160PQFP
• Manufacturer: National Semiconductor
• Series: AT/LANTIC™r

Specifications of DP83905AVQB

• Controller Type: AT, LAN Twisted-Pair Interface Controller
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 100mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 160-BFQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Interface: -
• Other names: *DP83905AVQB

Bits
D0
D1
D2
D3
D4
D5
D6
D7
5 0 Register Descriptions
RECEIVE CONFIGURATION REGISTER (RCR)
This register determines operation of the AT LANTIC Controller during reception of a packet and is used to program what types
of packets to accept
Note D2 and D3 are ‘‘OR’d’’ together i e if D2 and D3 are set the AT LANTIC Controller will accept broadcast and multicast addresses as well as its own
physIcal address To establish full promiscuous mode bits D2 D3 and D4 should be set In addition the multicast hashing array must be set to all 1’s in order to
accept all multicast addresses
Symbols
SEP
AR
AB
AM
PRO
reserved
reserved
reserved
SAVE ERRORED PACKETS
0 Packets with receive errors are rejected
1 Packets with receive errors are accepted Receive errors are CRC and Frame Alignment errors
ACCEPT RUNT PACKETS This bit allows the receiver to accept packets that are smaller than 64
bytes The packet must be at least 8 bytes long to be accepted as a runt
0 Packets with fewer than 64 bytes rejected
1 Packets with fewer than 64 bytes accepted
ACCEPT BROADCAST Enables the receiver to accept a packet with an all 1’s destination address
0 Packets with broadcast destination address rejected
1 Packets with broadcast destination address accepted
ACCEPT MULTICAST Enables the receiver to accept a packet with a multicast address all multicast
addresses must pass the hashing array
0 Packets with multicast destination address not checked
1 Packets with multicast destination address checked
PROMISCUOUS PHYSICAL Enables the receiver to accept all packets with a physical address
0 Physical address of node must match the station address programmed in PAR0–PAR5
1 All packets with physical addresses accepted
reserved (program to 0)
reserved
reserved
7
6
MON
(Continued)
5
0CH (WRITE)
PRO
4
39
Description
AM
3
AB
2
AR
1
SEP
0