DP83907VF National Semiconductor, DP83907VF Datasheet - Page 9

• Manufacturer Part Number: DP83907VF
• Description: IC CONTROLLR AT/LANII TP 160PQFP
• Manufacturer: National Semiconductor

Specifications of DP83907VF

• Controller Type: Network Interface Controller (NIC)
• Interface: Twisted Pair
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 150mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 160-MQFP, 160-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP83907VF

3 0 Simplified Application Diagram
4 0 Functional Description
The DP83907 is a highly integrated and configurable Ether-
net controller making it suitable for most Ethernet applica-
tions The DP83907 integrates the functions of the following
blocks
1 ISA Bus Interface containing all logic required to connect
2 DP8390 Ethernet Controller Core and Media Access
3 Media Interface which includes a TPI transceiver
4 1 BUS INTERFACE BLOCK
The DP83907’s Bus interface block provides the circuitry to
interface the Ethernet controller logic and the external pack-
et buffer RAM to an ISA (Industry Standard Architecture)
the DP8390 core to a packet buffer RAM and the ISA
bus
Control logic
FIGURE 1 Block Diagram of DP83907
(Continued)
9
Bus The bus interface provides an NE2000 Architecture
compatible I O port architecture supporting both 8-bit and
16-bit wide ISA Bus slots
DETERMINING 8-BIT OR 16-BIT WIDE DATA
DP83907 can treat the system data bus and all internal data
busses as 8 bits or 16 bits wide 8-bit or 16-bit mode is
determined by MSA9 at reset For an adapter card this pin
can be used to automatically detect if the card has been
plugged into an 8-bit or 16-bit slot by connecting MSA9 via a
10 k
will be pulled high when plugged into a 16-bit slot enabling
16-bit mode and floating when plugged into an 8-bit slot
When floating the internal pull-down resistor will enable 8-bit
mode
pull-up resistor to a V
DD
on the upper connector It
TL F 12082 – 4