
AX88780
3
ASIX ELECTRONICS CORPORATION
Content
1.0 Introduction.........................................................................................................................................................................7
1.1 General Description .......................................................................................................................................................7
1.2 AX88780 Block Diagram...............................................................................................................................................7
1.3 AX88780 Pinout Diagram..............................................................................................................................................8
2.0 Signal Description...............................................................................................................................................................9
2.1 Signal Type Definition...................................................................................................................................................9
2.2 Host Interface.................................................................................................................................................................9
2.3 EEPROM Interface......................................................................................................................................................10
2.4 Regulator Interface.......................................................................................................................................................11
2.5 10/100M PHY Interface...............................................................................................................................................11
2.6 MII Interface................................................................................................................................................................11
2.7 Miscellaneous ..............................................................................................................................................................12
2.8 Power/ground pin.........................................................................................................................................................12
3.0 Functional Description......................................................................................................................................................13
3.1 Host Interface...............................................................................................................................................................13
3.2 System Address Range.................................................................................................................................................13
3.3 TX Buffer Operation....................................................................................................................................................13
3.4 RX Buffer Operation....................................................................................................................................................13
3.5 Flow Control................................................................................................................................................................14
3.6 Checksum Offloads and Wake-up................................................................................................................................14
3.7 Fast-Mode support.......................................................................................................................................................14
3.8 Big/Little-endian support.............................................................................................................................................14
3.9 10/100BASE-TX PHY.................................................................................................................................................14
3.9 16-bit Mode..................................................................................................................................................................15
3.11 EEPROM Format.......................................................................................................................................................16
4.0 Register Description .........................................................................................................................................................17
4.1 CMD--Command Register...........................................................................................................................................18
4.2 IMR--Interrupt Mask Register .....................................................................................................................................18
4.3 ISR--Interrupt Status Register......................................................................................................................................19
4.4 TX_CFG--TX Configuration Register.........................................................................................................................20
4.5 TX_CMD--TX Command Register .............................................................................................................................20
4.6 TXBS--TX Buffer Status Register ...............................................................................................................................20
4.7 PHY_CTRL-- Internal PHY Control Register.............................................................................................................21
4.8 TXDES0--TX Descriptor0 Register.............................................................................................................................22
4.9 TXDES1--TX Descriptor1 Register.............................................................................................................................22
4.10 TXDES2--TX Descriptor2 Register...........................................................................................................................22