ESD

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The method to connect 2 Davicom devices without transformers

IC 1	IC 2	Reference Circuit	AVDD_1	AVDD_2
DM9000A	DM9000A	1	2.5V	2.5V
DM9000A	DM9000B	2	2.5V	1.8V
DM9000B	DM9000B	1	1.8V	1.8V
DM9161A	DM9161A	1	2.5V	2.5V
DM9161A	DM9161B	2	2.5V	1.8V
DM9161B	DM9161B	1	1.8V	1.8V

 

Reference Circuit 1

Reference Circuit 2

 

 

Power Management of Davicom ICs

Power Reduced Mode: PHY Reg. 10H.4

Power Down Mode: PHY Reg. 00H.11 or MAC Reg. 1FH.0

Stop Internal System Clock: MAC Reg. 50H.0

 

	System Clock	MAC	PHY
			TX	RX
Power Reduced Mode (PHY Reg. 16.4)	On	On	Off	On
Power Down Mode (PHY Reg. 0.11/MAC Reg. 1FH.0)	On	On	Off	Off
System Clock Off (MAC Reg. 50H.0)	Off	Off	On	On
Power Down Mode (system clock off)	Off	Off	Off	Off

 

DM9000 Series Power comparison list

Item	DM9000	DM9000A	DM9000B	SMSC LAN9211	Asix AX88796B
Pin counts	100	48	48	56	64
PHY Type	Analog	Analog	DSP	DSP	NA
Power Consumption (mW)
100Base-TX	330	287.1	429	514	495
10Base-T	280.5	303.6	561	578	462
10Base-T (power saving)	NA	NA	528	NA	NA
10Base-T Idle	145.2	125.4	198 (power saving)	569	448 (power saving)
Auto-Negotiation	198	184.8	198	NA	587
Power Reduce Mode	66	102.3	NA	NA	NA
Power Down Mode	NA	69.3	NA	61	140
Power Down Mode (system clock off)	33	23.1	66	10	0.9