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

Electronic signature



Chip Enable ‘don’t care’



Security features

o OTP area



Serial number (unique ID) option



Hardware data protection

o Program/erase locked during power transitions



Data integrity

o 100,000 program/erase cycles (with ECC)

o 10 years data retention



RoHS compliant packages



Development tools

o Error correction code models

o Bad blocks management and wear leveling algorithms

14.3

The AX88772A/AX88172A Low-pin-count USB 2.0 to 10/100M Fast Ethernet controller is a high 
performance and highly integrated ASIC which enables low cost, small form factor, and simple plug-and-
play Fast Ethernet network connection capability for desktops, notebook PC’s, Ultra-Mobile PC’s, docking 
stations, game consoles, digital-home appliances, and any embedded system using a standard USB port.

The AX88772A/AX88172A features a USB interface to communicate with a USB Host Controller and is 
compliant with USB specification V1.1 and V2.0. The AX88772A/AX88172A implements 10/100Mbps 
Ethernet LAN function based on IEEE802.3, and IEEE802.3u standards with 24KB of embedded SRAM for 
packet buffering. The AX88772A/AX88172A integrates an on-chip 10/100Mbps Ethernet PHY to simplify 
system design.

The AX88172A provides an optional External Media Interface (EMI) for external PHY or external MAC for 
different application purposes. The EMI can be a media-independent interface (MII) for implementing 
100BASE-FX Ethernet or HomePNA functions. The EMI can also be a Reverse-MII or Reverse Reduced-MII 
(Reverse-RMII) for glueless MAC-to-MAC connections to any MCU with Ethernet MAC MII or RMII interface. 
In addition, the EMI can be configured to Dual-PHY mode allowing AX88172A to act as an Ethernet PHY or 
USB 2.0 PHY for external MAC device that needs Ethernet and USB interfaces in their system applications. 
The optional serial interface such as I2C, SPI, and UART are provided as a control channel from the USB 
Host Controller to communicate with the external MCU chip.

Single chip USB 2.0 to 10/100M Fast Ethernet controller – AX88772A



Integrates on-chip USB 2.0 transceiver and SIE compliant to USB Spec 1.1 and 2.0



Supports USB Full and High Speed modes with Bus-Power or Self-Power capability



Supports 4 or 6 programmable endpoints on USB interface



High performance packet transfer rate over USB bus using proprietary burst transfer 

mechanism 



Supports USB to Ethernet bridging or vice versa in hardware



Integrates 10/100Mbps Fast Ethernet MAC/PHY



IEEE 802.3 10BASE-T/100BASE-TX compatible



Supports twisted pair crossover detection and auto-correction (HP Auto-MDIX)



Embedded 16KB SRAM for RX packet buffering and 8KB SRAM for TX packet buffering



Supports both Full-duplex with flow control and



Half-duplex with backpressure operation



Supports 2 VLAN ID filtering, received VLAN Tag (4 bytes) can be stripped off or preserved 

MAC/PHY loop-back diagnostic capability

15.2

15.1



Supports Suspend Mode and Remote Wakeup via Link-up, Magic packet, MS wakeup frame 

and external pin



Optional PHY power down during Suspend Mode



Optional MII interface in MAC mode allows AX88172A to work with external 100BASE-FX 

Ethernet PHY or HomePNA PHY



Optional Reverse-MII or Reverse-RMII interface in PHY mode allows AX88172A to work with 

external HomePlug PHY or glueless MAC-to-MAC connections



Optional Reverse-MII interface in Dual-PHY mode allows AX88172A to act as an Ethernet 

PHY or USB 2.0 PHY for external MAC device that needs Ethernet and USB in system 
application



Supports 256/512 bytes (93c56/93c66) of serial EEPROM (for storing USB Descriptors)



Supports automatic loading of Ethernet ID, USB Descriptors and Adapter Configuration 

from EEPROM after power-on initialization



Provides optional serial interface, I2C, SPI and UART



Integrates on-chip voltage regulator and only requires a single 3.3V power supply



12MHz and 25Mhz clock input from either crystal or oscillator source



Integrates on-chip power-on reset circuit

The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current. It 
has the same pin-out as National Semiconductor’s industry standard LM317. The LM1117 is available in an 
adjustable version, which can set the output voltage from 1.25V to 13.8V with only two external resistors. In 

addition, it is also available in five fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V. The LM1117 offers 

current limiting and thermal shutdown. Its circuit includes a zener trimmed band-gap

reference to as-sure output voltage accuracy to within ±1%. The LM1117 series is available in SOT- 223, 
TO-220, and TO-252 D-PAK packages. A minimum of 10μF tantalum capacitor is required at the output to 

improve the transient response and stability.



Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions



Space Saving SOT-223 Package



Current Limiting and Thermal Protection



Output Current 800mA



Line Regulation 0.2% (Max)



Load Regulation 0.4% (Max)



Temperature Range



LM1117 0°C to 125°C



LM1117I -40°C to 125°C

15.4

15.3

The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current. It 
has the same pin-out as National Semiconductor’s industry standard LM317. The LM1117 is available in an 
adjustable version, which can set the output voltage from 1.25V to 13.8V with only two external resistors. In 

addition, it is also available in five fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V. The LM1117 offers 

current limiting and thermal shutdown. Its circuit includes a zener trimmed band-gap

reference to as-sure output voltage accuracy to within ±1%. The LM1117 series is available in SOT- 223, 
TO-220, and TO-252 D-PAK packages. A minimum of 10μF tantalum capacitor is required at the output to 

improve the transient response and stability.



Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions



Space Saving SOT-223 Package



Current Limiting and Thermal Protection



Output Current 800mA



Line Regulation 0.2% (Max)



Load Regulation 0.4% (Max)



Temperature Range



LM1117 0°C to 125°C



LM1117I -40°C to 125°C



2.85V Model for SCSI-2 Active Termination



Post Regulator for Switching DC/DC Converter



High Efficiency Linear Regulators 15



32” TFT TV Service Manual 10/01/2005



Battery Charger



Battery Powered Instrumentation

16.5

16.4

16.3

16.2

16.1