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