DM9621 datasheet(2/66 Pages) DAVICOM

2 / 66 page

DM9621

USB2.0 to Fast Ethernet Controller

Preliminary

Version: DM9621 -14-DS-P02

February 23, 2011

CONTENT

1. Features: ............................................................................................................................. 6

1.1 System Description..................................................................................................... 7

2. Block Diagram and Block Description.................................................................................. 8

3. Pin Configuration: ................................................................................................................ 9

3.1 48- Pin QFN................................................................................................................ 9

3.2 48-pin description ..................................................................................................... 10

3.3 strap pins table ......................................................................................................... 12

4. Vendor Control and Status Register Set............................................................................ 13

4.1 Network Control Register (00H)................................................................................ 14

4.2 Network Status Register (01H) ................................................................................. 15

4.3 TX Control Register (02H) ........................................................................................ 16

4.4 RX Control Register ( 05H )...................................................................................... 16

4.5 RX Status Register ( 06H ) ....................................................................................... 17

4.6 Receive Overflow Counter Register ( 07H ).............................................................. 17

4.7 Back Pressure Threshold Register (08H) ................................................................. 18

4.8 Flow Control Threshold Register ( 09H ) .................................................................. 18

4.9 RX/TX Flow Control Register ( 0AH ) ....................................................................... 19

4.10 EEPROM & PHY Control Register ( 0BH ) ............................................................. 19

4.11 EEPROM & PHY Address Register ( 0CH ) ........................................................... 20

4.12 EEPROM & PHY Data Register ( EE_PHY_L：0DH

EE_PHY_H：0EH ).... 20

4.13 Wake Up Control Register ( 0FH ).......................................................................... 20

4.14 Physical Address Register ( 10H~15H ) ................................................................. 20

4.15 Multicast Address Register ( 16H~1DH )................................................................ 21

4.16 General purpose control Register ( 1EH ) ............................................................ 21

4.17 General purpose Register ( 1FH ) .......................................................................... 21

4.18 Vendor ID Register (28H~29H)............................................................................... 21

4.19 Product ID Register (2AH~2BH) ............................................................................. 21

4.20 Chip Revision Register (2CH)................................................................................. 21

4.21 TX Special Control Register (2DH)......................................................................... 22

4.22 External PHY Force Mode Control Register (2EH)................................................. 22

4.23 Transmit Check Sum Control Register (31H) ......................................................... 22

4.24 Receive Check Sum Control Status Register (32H) ............................................... 23

4.25 External PHYceiver Address Register (33H) .......................................................... 23

DM9621 Datasheet(PDF) 2 Page - Davicom Semiconductor, Inc.