3

08/18/00

GL652USB 7 PORT USB HUB CONTROLLER

Revision 1.2

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FUNCTION OVERVIEW

The GL652USB is an 8 port USB hub with 1 upstream port and 7 downstream ports. It

uses an 8-bit RISC-like uC to encode/decode the host commands. The GL652USB 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 GL652USB can switch between self-

power and bus-power automatically without re-plug in. The GL652USB 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 GL652USB supplies power enable flags by reading the over-current

flags. The GL652USB 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 GL652USB will turn LED off and stop the

clock when they are suspended.

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PIN DEFINITIONS AND DESCRIPTIONS

l

GL652USB

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

DP7

I/O

Downstream port 7 USB data+

5

DM7

I/O

Downstream port 7 USB data-

6

DP1

I/O

Downstream port 1 USB data+

7

DM1

I/O

Downstream port 1 USB data-

8

DP6

I/O

Downstream port 6 USB data+

9

DM6

I/O

Downstream port 6 USB data-

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

DP5

I/O

Downstream port 5 USB data+

17

DM5

I/O

Downstream port 5 USB data-

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

LED5

O

LED traffic indicator for downstream port 5