IP1001-DS-R05 datasheet(24/48 Pages) ETC2

24 / 48 page

IP1001 LF

Data Sheet

3.8

Smart speed

IP1001 supports smart speed function. If IP1001 can’t link at Gigabit speed due to cable quality, the link

speed is down shift to 100M automatically if smart speed option is turned on. If the function is turned off,

IP1001 will link down if it can’t link at giga mode due to cable quality. The function is default on and it can be

enabled/disabled by programming MII register 16.11.

3.9

Power supply

IP1001 has 4 sets of power pins, DVDD, AVDD, VDDO and AVDDH. VDDO is connected to 3.3v or 2.5v

depending on MAC interface is GMII or RGMII. AVDDH can use the same power source of VDDO, that is 3.3v

or 2.5v, but it needs a bead to prevent VDDO noise. AVDD can be connected to 1.8v or 2.1v. If there is no

external 1.8v power source, user can use the 2.1v power generated by the built in regulator (CTRL21). DVDD

is connected to 1.2v. The center tap of transformer can be connected to 2.1v or 2.5v. If there is no external

2.5v power source, user can use the 2.1v power generated by the built in regulator control(CTRL21). The

current limit of bead should be large enough to prevent the IR drop in power supply input.

IP 10 01

DVDD

AV D D

VD D O

AV D D H

1 .2 v (fro m re g u la to r)

1.8v or

2 .1 v (fro m re g u la to r)

3.3v (G M II) or

2.5v (R G M II)

b ead

T ran s form e r

2.5v o r 2.1v (from reg ula to r)

CT RL 1 2 D

CT R L 2 1

PN P

1.2v

2 .1 v

b ead

Dec. 18, 2007

24/48

IP1001-DS-R06

IP1001-DS-R05 Datasheet(PDF) 24 Page - List of Unclassifed Manufacturers