RTL8201BL

2002-03-29

Rev.1.2

7

5.6 LED Interface/PHY Address Config

These five pins are latched into the RTL8201BL during power up reset to configure PHY address [0:4] used for MII

management register interface. And then, in normal operation after initial reset, they are used as driving pins for status

indication LED. The driving polarity, active low or active high, is determined by each latched status of the PHY address [4:0]

during power-up reset. If latched status is High then it will be active low, and if latched status is Low then it will be active high.

Refer to Section 7.5 for more information.

Symbol

Type

Pin No.

Description

PHYAD0/

LED0

LI/O

9

PHY Address [0]

Link LED: Active when linked.

PAD1/

LED1

LI/O

10

PHY Address [1]

Full Duplex LED: Active when in Full Duplex operation.

PHYAD2/

LED2

LI/O

12

PHY Address [2]

Link 10/ACT LED: Active when linked in 10Base-T mode, and blinking

when transmitting or receiving data.

PHYAD3/

LED3

LI/O

13

PHY Address [3]

Link 100/ACT LED: Active when linked in 100Base-TX and blinking

when transmitting or receiving data.

PHYAD4/

LED4

LI/O

15

PHY Address [4]

Collision LED: Active when collisions occur.

5.7 Reset and other pins

Symbol

Type

Pin No.

Description

RESETB

I

42

RESETB: Set low to reset the chip. For a complete reset function, this pin

must be asserted low for at least 10ms.

PWFBOUT

O

32

Power Feedback Output: Be sure to connect a 22uF tantalum capacitor for

frequency compensation and a 0.1uF capacitor for noise de-coupling. Then

connect this pin through a ferrite bead to PWFBIN(pin8). The connection

method is figured in section 7.11.

PWFBIN

I

8

Power Feedback Input: see the description of PWFBOUT.

NC

27

Not connection

5.8 Power and Ground pins

Symbol

Type

Pin No.

Description

AVDD33

P

36

3.3V Analog power input: 3.3V power supply for analog circuit; should be

well decoupled.

AGND

P

29,35

Analog Ground: Should be connected to a larger GND plane

DVDD33

P

14,48

3.3V Digital Power input: 3.3V power supply for digital circuit.

DGND

P

11,17,45

Digital Ground: Should be connected to a larger GND plane.