4-Port USB 2.0 Controller

Datasheet

SMSC USB20H04

Page 33

Revision 1.63 (03-30-07)

DATASHEET

Chapter 10 Application Diagrams

The highly-integrated USB20H04 Hub Controller is complemented with a minimal number of external

components to create a complete four-port Hi-Speed USB hub application. Figure 10.1 illustrates one

possible hardware configuration, but is not a complete schematic. This block diagram shows a

self-powered hub with individual over-current protection and power switching on each downstream port.

V

BUS

D+

D-

GND

GR

AM

V

BUS

D+

D-

GND

GR

AM

V

BUS

D+

D-

GND

GR

AM

V

BUS

D+

D-

GND

GR

AM

OUT1

OUT2

OUT3

OUT4

EN1

OC1

EN2

OC2

EN3

OC3

EN4

OC4

3.3V

1.8V

VBUSDET

USBDP0

USBDM0

SCK/SCL

SD/SDA

SCLK

SD

USBDP1

USBDM1

VBUS1_N

OCS1_N

GR1_N

AM1_N

IN

USB20H04

Dual

Voltage

Regulator

Quad

Power

Switch

Four

Downstream

Ports

Serial

EEPROM

Upstream

Port

5V

Self-Power

5V

Self-Power

V

BUS

D+

D-

IN

OUT1

OUT2

XTAL1

XTAL2

USBDP2

USBDM2

VBUS2_N

OCS2_N

GR2_N

AM2_N

USBDP3

USBDM3

VBUS3_N

OCS3_N

GR3_N

AM3_N

USBDP4

USBDM4

VBUS4_N

OCS4_N

GR4_N

AM4_N

Figure 10.1 - High Level Block Diagram of a Self-Powered Hub