AM79C973BKD\W AMD (ADVANCED MICRO DEVICES), AM79C973BKD\W Datasheet - Page 38

• Manufacturer Part Number: AM79C973BKD\W
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM79C973BKD\W

• Lead Free Status / RoHS Status: Compliant

(MRX_DONEM, MTX_DONEM) located in the Com-
mand register.
Note: The SMI interrupt acknowledge does not follow
the SMBus alert protocol, but simply requires clearing
the interrupt bit.
Power Supply
VDDB
I/O Buffer Power (6 Pins)
There are seven power supply pins that are used by the
input/output buffer drivers. All VDDB pins must be con-
nected to a +3.3 V supply.
VDD_PCI
PCI I/O Buffer Power (9 Pins)
There are nine power supply pins that are used by the
PCI input/output buffer drivers (except PME driver). All
VDD_PCI pins must be connected to a +3.3 V supply.
VSSB
I/O Buffer Ground (17 Pins)
Ground
There are 17 ground pins that are used by the input/
output buffer drivers.
VDD
Digital Power (6 Pins)
There are six power supply pins that are used by the in-
ternal digital circuitry. All VDD pins must be connected
to a +3.3 V supply.
VSS
Digital Ground (8 Pins)
There are eight ground pins that are used by the inter-
nal digital circuitry.
38
+3.3 V Power
+3.3 V Power
+3.3 V Power
P R E L I M I N A R Y
Am79C973/Am79C975
Ground
DVDDD, DVDDP
PDX Block Power
These pins supply power to the 100 Mbps Physical
Data Transceiver (PDX) block. They must be con-
nected to a +3.3 V ±5% source. These pins require
careful decoupling to ensure proper device perfor-
mance.
DVDDRX, DVDDTX
I/O Buffer Power
These pins supply power to the MLT-3/PECL/10BASE-
T input/output buffers. They also supply the MLT-3 cir-
cuits (equalizer, etc.) of the network port. They must be
connected to a +3.3 V ±5% source. These pins require
careful decoupling to ensure proper device perfor-
mance.
DVDDA
Analog PLL Power
This pin supplies power to the IREF current reference
circuit and the 10BASE-T analog PLL. They must be
connected to a +3.3 V ±5% source. These pins require
careful decoupling to ensure proper device perfor-
mance.
DVSSX
All Blocks
These pins are the ground connection for all blocks of
the device except the PDX block. They must be directly
connected to the common external ground plane.
DVSSD, DVSSP
PDX Ground
These pins are the ground connection for the Physical
Data Transceiver (PDX) block. They must be directly
connected to the common external ground plane.
DVDDCO
Crystal
This pin supplies the power to the Crystal circuit.
+3.3 V Power
+3.3 V Power
+3.3 V Power
+3.3 V Power
Ground
Ground