DP83820BVUW National Semiconductor, DP83820BVUW Datasheet - Page 7

• Manufacturer Part Number: DP83820BVUW
• Description: IC INTERFACE CONTROLLER 208-PQFP
• Manufacturer: National Semiconductor

Specifications of DP83820BVUW

• Controller Type: Ethernet Controller, MAC/BIU
• Interface: IEEE 802.3
• Voltage - Supply: 3.3V
• Current - Supply: 150mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 208-MQFP, 208-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP83820BVUW

2.0 Pin Descriptions
BIOS ROM/Flash Interface
Note: DP83820 supports NM27LV010 for the ROM interface device.
Clock Interface
Phy And General Purpose Interface
GP1DUP
GP2
GP3
GP4
GP5
PHYLNK
SPD100
SPD1000
PHYRSTN
MWRN
MRDN
X1
X2
Symbol
Symbol
Symbol
Pin No(s)
Pin No(s)
131
127
128
129
130
132
133
134
172
122
121
Pin No(s)
94
93
(Continued)
Direction
Direction
I/O
I/O
I/O
I/O
I/O
O
Direction
O
I
I
I
I
O
O
Crystal/Oscillator Input: This pin is the primary clock reference input for the
DP83820 IC and must be connected to a 25MHz 0.005% (50ppm) clock source.
The DP83820 device supports either an external crystal resonator connected
across pins X1 and X2, or an external CMOS-level oscillator source connected
to pin X1 only.
Crystal Output: This pin is used in conjunction with the X1 pin to connect to an
external 25MHz crystal resonator device. This pin must be left unconnected if
an external CMOS oscillator clock source is utilized. For more information see
the definition for pin X1.
General Purpose Pin 1 or Duplex Status: By default, this pin can be used to
input the Full Duplex status from an external Phy. The pin can also be
programmed as a general purpose I/O. This pin pad has an internal weak pull
up.
General Purpose Pin 2: This pin is a general purpose I/O pin that can be
programmed as an input or output. This pin has an internal weak pull up.
General Purpose Pin 3: This pin is a general purpose I/O pin that can be
programmed as an input or output. This pin has an internal weak pull up.
General Purpose Pin 4: This pin is a general purpose I/O pin that can be
programmed as an input or output. This pin has an internal weak pull up.
General Purpose Pin 5: This pin is a general purpose I/O pin that can be
programmed as an input or output. This pin has an internal weak pull up.
Phy Link Status: This can be used to input the Phy Link Status. This allows the
value to be read back from the MAC register space.
100 Mb/s Speed Status: This can be used to input the 100 Mb/s Speed Status
from an external phy. This is used along with the SPD1000 bit to determine
current speed status of the Phy.
1000 Mb/s Speed Status: This can be used to input the 1000 Mb/s Speed
Status from an external phy. This is used along with the SPD100 bit to
determine current speed status of the Phy.
Phy Reset: This pin can be used to reset an External Phy.
BIOS ROM/Flash Write: During a BIOS ROM/Flash access, this signal is
used to enable data to be written to the Flash device.
BIOS ROM/Flash Read: During a BIOS ROM/Flash access, this signal is
used to enable data to be read from the Flash device.
7
Description
Description
Description
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