DP83916VF National Semiconductor, DP83916VF Datasheet - Page 68

• Manufacturer Part Number: DP83916VF
• Description: IC CTRLR ORIENT NETWK IN 132PQFP
• Manufacturer: National Semiconductor
• Series: SONIC™r

Specifications of DP83916VF

• Controller Type: Network Interface Controller (NIC)
• Interface: Bus
• Mounting Type: Surface Mount
• Package / Case: 132-MQFP, 132-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Supply: -
• Voltage - Supply: -
• Operating Temperature: -
• Other names: *DP83916VF

5 0 Bus Interface
13 PCOMP will not be asserted (DCR2)
14 Packets will be accepted (not rejected) on CAM match
A software reset immediately terminates DMA operations
and future interrupts The chip is put into an idle state where
registers can be accessed but the SONIC-16 will not be
active in any other way The registers are affected by a
software reset as shown in Table 5-4 (only the Command
Register is changed)
6 0 Network Interfacing
The SONIC-16 contains an on-chip ENDEC that performs
the network interfacing between the AUI (Attachment Unit
(DCR2)
(Continued)
FIGURE 6-1 MAC and Internal ENDEC Interface Signals
68
Interface) and the SONIC-16’s MAC unit A pin selectable
option allows the internal ENDEC to be disabled and the
MAC ENDEC signals to be supplied to the user for connec-
tion to an external ENDEC If the EXT pin is tied to ground
(EXT
to V
Internal ENDEC
(EXT
MAC unit are internally connected While these signals are
used internally by the SONIC-16 they are also provided as
an output to the user (Figure 6-1)
The internal ENDEC allows for a 2-chip solution for the
complete Ethernet interface Figure 6-2 shows a typical dia-
gram of the network interface
CC
e
e
0) the internal ENDEC is selected and if EXT is tied
0) the interface signals between the ENDEC and
(EXT
e
1) the external ENDEC option is selected
When the internal ENDEC is used
TL F 11722 – 52