DM9161E/DM9161A/DM9161B比較表

Pin difference between DM9161 series

Pin	DM9161E	DM9161A	DM9161B
1, 2, 9	3.3V Power in	2.5 Power out	1.8V Power out
39	DVDD	DISMDIX	DISMDIX

Application: For DM9161E, pin 1, 2, 9 and 39 connects to DVDD, 3.3V directly. For DM9161A and DM9161B, pin 1, 2 and 9 are bound together to provide transformer center tap a bias voltage. The hardware design on DM9161A and DM9161B is the same.

Register difference between DM9161 series

Register	Name	DM9161E	DM9161A	DM9161B
1 (w/o link)	Basic Mode Status Register	7809	7849	7849
3	PHY ID Identifier Register #2	b880	b8a0	b8b0
20	Specified Config Register	Reserved	0080/0000	0080/0000
24 (EVB)	Davicom Hardware Reset Latch State Register	14e1	e4e1	e4e1
28		Reserved	Reserved	0003
29	Power Saving Control Register	Reserved	Reserved	0000

Application: If customer will check register 3 to validate PHY working or not, DM9161 series has different value for each version.

DM9000A/DM9000B比較表

Pin difference between DM9000A and DM9000B

Pin	DM9000A	DM9000B
2, 9	2.5V Power out	1.8V Power Out

Application: For pin difference between 2.5V and 1.8V, the board is not need to be modified.

MAC Register difference between DM9000A and DM9000B

Register	Name	DM9000A	DM9000B
2CH	Chip Revision Register	19	1A

EEPROM

No difference

PHY Register difference between DM9000A and DM9000B

Register	Name	DM9000A	DM9000B
03	PHY ID Identifier Register #2	B8A0	B8B0
28		Reserved	0003

Application: If the boot loader or driver from customer will check the MAC register 2CH or PHY register 03 to distinguish the IC is working or not, this should be carefully exam if the board can work on DM9000A but can't get DM9000B.