DP83850CVF National Semiconductor, DP83850CVF Datasheet - Page 26

• Manufacturer Part Number: DP83850CVF
• Description: IC CONTROLLER INTERFACE 132-PQFP
• Manufacturer: National Semiconductor

Specifications of DP83850CVF

• Controller Type: Ethernet Repeater Interface Controller
• Interface: Serial
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 295mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 132-MQFP, 132-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP83850CVF

5.0 DP83850C Applications
5.5 Port Partition and Jabber Status LEDs
Port Partition and Jabber Status must be decoded from the
PART[5:0] outputs as described in section 3.11. One possi-
ble decoder implementation is shown in Figure 11. This
uses 74LS259 addressable latches to hold the LED status
for each port. The lowest significant 3 bits of the port
address (PART[2:0]) are directly connected to each of the
DP83850C
100RIC
PART[0:2]
PART4
PART5
PART3
LCK
Figure 11. Implementation of a Jabber and Partition Status LED Scheme
25 MHz Clock
74F04
74F04
74F32
74F04
74F32
(Continued)
PART0
PART0
PART0
PART0
PART1
PART2
PART1
PART2
PART5
PART1
PART2
PART4
PART1
PART2
V CC
V CC
V CC
V CC
26
74LS259 addressable latches. The most significant
address bit (PART3) and its inverse are gated by the sys-
tem clock to produce low going pulses to the 74LS259
enables at the correct time.
A0
A1
A2
Din
A0
A1
A2
Din
A0
A1
A2
Din
A0
A1
A2
Din
/EN
/EN
/EN
/EN
/CLR
/CLR
/CLR
/CLR
'259
'259
'259
'259
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
NC
NC
NC
NC
NC
NC
NC
NC
V CC
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