SMSC LAN9420i Manual De Usuario

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Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
Revision 1.22 (09-25-08)
16
SMSC LAN9420/LAN9420i
DATASHEET
2.1
Pin List
Table 2.1 PCI Bus Interface Pins
NUM
PINS
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
1
PCI Clock In
PCICLK
IS
PCI Clock In: 0 to 33MHz PCI Clock Input.
1
PCI Frame
nFRAME
IPCI/
OPCI
PCI Cycle Frame
32
PCI Address 
and Data Bus
AD[31:0]
IPCI/
OPCI
PCI Address and Data Bus
1
PCI Reset
PCInRST
IS
PCI Reset
4
PCI  Bus 
Command and 
Byte Enables
nCBE[3:0]
IPCI/
OPCI
PCI Bus Command and Byte Enables
1
PCI Initiator 
Ready
nIRDY
IPCI/
OPCI
PCI Initiator Ready
1
PCI  Target 
Ready
nTRDY
IPCI/
OPCI
PCI Target Ready
1
PCI Stop
nSTOP
IPCI/
OPCI
PCI Stop
1
PCI Device 
Select
nDEVSEL
IPCI/
OPCI
PCI Device Select
1
PCI Parity
PAR
IPCI/
OPCI
PCI Parity
1
PCI  Parity 
Error
nPERR
IPCI/
OPCI
PCI Parity Error
1
PCI System 
Error
nSERR
IPCI/
OPCI
PCI System Error
1
PCI Interrupt
nINT
OPCI
PCI Interrupt
Note:
This pin is an open drain output.
1
PCI IDSEL
IDSEL
IPCI
PCI IDSEL
1
PCI Request
nREQ
OPCI
PCI Request
Note:
This pin is a tri-state output.
1
PCI  Grant
nGNT
IPCI
PCI Grant
1
PCI Power 
Management 
Event
nPME
OPCI
PCI Power Management Event
Note:
This pin is an open drain output.
1
Power Good
PWRGOOD
IS
(PD)
PCI Bus Power Good: This pin is used to sense the 
presence of PCI bus power during the D3 power 
management state.
Note:
This pin is pulled low through an internal pull-
down resistor
1
V
AUX
 Detection
VAUXDET
IS
(PD)
PCI Auxiliary Voltage Sense: This pin is used to sense 
the presence of a 3.3V auxiliary supply in order to define 
the PME support available.
Note:
This pin is pulled low through an internal pull-
down resistor