3

08/18/00

GL650USB 4 PORT USB HUB CONTROLLER

Revision 1.2

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FUNCTION OVERVIEW

The GLI650USB is a 5 port USB hub with 1 upstream port and 4 downstream ports. It

uses an 8-bit RISC-like uC to encode/decode the host commands. The GL650USB is

designed mainly for stand-alone hub and can also be integrated in PC mo therboard or any

other devices to support USB hub function. The GL650USB can switch between self-

power and bus-power automatically without re-plug in. The GL650USB can be

configured as individual mode or ganged mode for the power management of

downstream port devices. To prevent from abnormal current consumption of downstream

port devices, the GL650USB supplies power enable flags by reading the over-current

flags. The GL650USB supports smart traffic indication through the LED lighting. The

higher data traffic flows through one port, the higher frequency of that port’s LED blinks.

To minimize the power consumption, the GL650USB will turn LED off and stop the

clock when they are suspended.

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PIN DEFINITIONS AND DESCRIPTIONS

l

GL650USB

Pin No.

Name

I/O

Description

1

DP0

I/O

Upstream port USB data+

2

DM0

I/O

Upstream port USB data-

3

AGND

-

Analog ground

4

NC

-

15K resister pull low

5

NC

-

15K resister pull low

6

DP1

I/O

Downstream port 1 USB data+

7

DM1

I/O

Downstream port 1 USB data-

8

NC

-

15K resister pull low

9

NC

-

15K resister pull low

10

DP4

I/O

Downstream port 4 USB data+

11

DM4

I/O

Downstream port 4 USB data-

12

AVCC

-

Analog VCC(5V)

13

DP2

I/O

Downstream port 2 USB data+

14

DM2

I/O

Downstream port 2 USB data-

15

VCP

-

3.3V output

16

NC

-

15K resister pull low

17

NC

-

15K resister pull low

18

DP3

I/O

Downstream port 3 USB data+

19

DM3

I/O

Downstream port 3 USB data-

20

SUSPND

O

Suspend indication output

21

SELF

I

1: SELF-powered. 0: INDIVIDUAL-powered

22

LED1

O

LED traffic indicator for downstream port 1

23

LED2

O

LED traffic indicator for downstream port 2

24

LED3

O

LED traffic indicator for downstream port 3

25

RESET

I

Reset input

26

LED4

O

LED traffic indicator for downstream port 4

27

OVCUR4#

I

Over current flag for downstream port4

28

NC

-

-

29

PWRENB4#

O

Power enable for downstream port 4