LAN9420
LAN9420/LAN9420i is a full-featured, Fast Ethernet controller which allows for the easy and cost-effective integration of Fast Ethernet into a PCI-based system. LAN9420/LAN9420i consists of a PCI Local Bus Specification Revision 3.0 compliant interface, DMA Controller, Ethernet MAC, and 10/100 Ethernet PHY.
LAN9420/LAN9420i provides full IEEE 802.3 compliance and all internal components support full/half-duplex 10BASE-T, 100BASE-TX, and manual full-duplex flow control. The descriptor based scatter-gather DMA supports usage of zero-copy drivers, effectively increasing throughput while decreasing Host load. The integrated IRQ deassertion timer allows a minimum IRQ deassertion time to be set, providing reduced Host load and greater control over service routines. Automatic 32-bit CRC generation/checking, automatic payload padding, and 2K jumbo packets (2048 byte) are supported.
Features- Optimized for embedded applications with 32-bit RISC CPUs
- Integrated descriptor based scatter-gather DMA and IRQ deassertion timer effectively increase network throughput and reduce CPU loading
- Integrated Ethernet MAC with full-duplex support
- Integrated 10/100 Ethernet PHY with HP Auto-MDIX Support
- 32-bit, 33MHz, PCI 3.0 compliant interface
- Reduced power operating modes with PCI Power Management Specification 1.1 compliance
- Supports multiple audio & video streams over Ethernet
- Cable, satellite, and IP set-top boxes
- Digital televisions
- Digital video recorders
- Home gateways
- Digital media clients/servers
- Industrial automation systems
- Industrial/single board PC
- Kiosk/POS enterprise equipment
- Integrated High-Performance 10/100 Ethernet Controller
Fully compliant with IEEE 802.3/802.3u
Integrated Ethernet MAC and PHY
10BASE-T and 100BASE-TX support
Full- and Half-duplex support
Full-duplex flow control
Preamble generation and removal
Automatic 32-bit CRC generation and checking
Automatic payload padding and pad removal
Loop-back modes
Flexible address filtering modes
One 48-bit perfect address
64 hash-filtered multicast addresses
Pass all multicast
Promiscuous mode
Inverse filtering
Pass all incoming with status report
Wakeup packet support
Integrated 10/100 Ethernet PHY
Auto-negotiation
Automatic polarity detection and correction
Supports HP Auto-MDIX
Supports energy-detect power down
Support for 3 status LEDs
Receive and transmit TCP checksum offload
- Fully compliant with IEEE 802.3/802.3u
- Integrated Ethernet MAC and PHY
- 10BASE-T and 100BASE-TX support
- Full- and Half-duplex support
- Full-duplex flow control
- Preamble generation and removal
- Automatic 32-bit CRC generation and checking
- Automatic payload padding and pad removal
- Loop-back modes
- Flexible address filtering modes
One 48-bit perfect address
64 hash-filtered multicast addresses
Pass all multicast
Promiscuous mode
Inverse filtering
Pass all incoming with status report
- One 48-bit perfect address
- 64 hash-filtered multicast addresses
- Pass all multicast
- Promiscuous mode
- Inverse filtering
- Pass all incoming with status report
- Wakeup packet support
- Integrated 10/100 Ethernet PHY
Auto-negotiation
Automatic polarity detection and correction
Supports HP Auto-MDIX
Supports energy-detect power down
- Auto-negotiation
- Automatic polarity detection and correction
- Supports HP Auto-MDIX
- Supports energy-detect power down
- Support for 3 status LEDs
- Receive and transmit TCP checksum offload
- PCI Interface
PCI Local Bus Specification Revision 3.0 compliant
32-bit/33-MHz PCI bus
Descriptor based scatter-gather DMA enables zero-copy drivers
- PCI Local Bus Specification Revision 3.0 compliant
- 32-bit/33-MHz PCI bus
- Descriptor based scatter-gather DMA enables zero-copy drivers
- Comprehensive Power Management Features
Supports PCI Bus Power Management Interface Specification, Revision 1.1
Supports optional wake from D3cold (via configuration strap option when Vaux is available)
Wake on LAN
Wake on link status change (energy detect)
Magic packet wakeup
- Supports PCI Bus Power Management Interface Specification, Revision 1.1
- Supports optional wake from D3cold (via configuration strap option when Vaux is available)
- Wake on LAN
- Wake on link status change (energy detect)
- Magic packet wakeup
- General Purpose I/O
3 programmable GPIO pins
2 GPO pins
- 3 programmable GPIO pins
- 2 GPO pins
- Support for Optional EEPROM
Serial interface provided for EEPROM
Used to store PCI and MAC address configuration values
- Serial interface provided for EEPROM
- Used to store PCI and MAC address configuration values
- Miscellaneous features
Big/Little/Mixed endian support for registers, descriptors, and buffers
IRQ deassertion timer
General purpose timer
- Big/Little/Mixed endian support for registers, descriptors, and buffers
- IRQ deassertion timer
- General purpose timer
- Single 3.3V Power Supply
Integrated 1.8V regulator
- Integrated 1.8V regulator
- Packaging
Available in 128-pin VTQFP RoHS Compliant package
- Available in 128-pin VTQFP RoHS Compliant package
- Environmental
Available in commercial & industrial temperature ranges
- Available in commercial & industrial temperature ranges
| Parameter
Parameter Name
Value
| Value |
Description
10Based-T/100Based-TX Ethernet Controller with PCI interface
|
10Based-T/100Based-TX Ethernet Controller with PCI interface
|
Ethernet Bandwidth
10Base-T/ 100Base-TX
|
10Base-T/ 100Base-TX
|
MAC
Yes
|
Yes
|
PHY
Yes
|
Yes
|
TX/RX RAM Buffer(Bytes)
N/A
|
N/A
|
Interrupt Pin
1
|
1
|
LEDs
3
|
3
|
Op. Voltage (V)
3.3
|
3.3
|
# Ethernet Ports
1
|
1
|
Temp. Range Min. (°C)
-40
|
-40
|
Temp. Range Max. (°C)
85
|
85
|
Max Speed (MHz)
33Mhz
|
33Mhz
|
Mixed Endian
Yes
|
Yes
|
Checksum Offload
Yes
|
Yes
|
Interface1
32 bit PCI 3.0
|
32 bit PCI 3.0
|
Vdd I/O (V)
3.3
|
3.3
|
|
Documents
Similar Devices
RoHS Information
PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
---|
LAN9420I-NU | 0.557500 | 2.888889 | 128 | TQFP | 14x14x1mm | Matte Tin | e3 | ![](/image/microchip/rohs.png) | ![](/image/microchip/china-efup.png) |
LAN9420-NU | 0.557500 | 2.888889 | 128 | TQFP | 14x14x1mm | Matte Tin | e3 | ![](/image/microchip/rohs.png) | ![](/image/microchip/china-efup.png) |