SMSC USB20H04 Chapter 2 Functional Block Diagram, PLL, PHY, SIE, Port, Detect, PHY #1, PHY #4, Port #1, Port #4, Upstream, Repeater, OC Sense, OC Sense, Bus-Power

4-Port USB 2.0 Controller

Datasheet

Chapter 2 Functional Block Diagram

To Upstream	Upstream	24 MHz				Pin		To EEPROM or
					Selectable
VBUS	USB Data	Crystal						SMBus Master
					Options
										SD SCK
			PLL		Internal					Serial
Bus-Power					Configuration
	Upstream								Interface
Detect/					Select
	PHY
VBUS Pulse
				SIE			Controller
	Repeater

TT	TT	TT	TT	Port
#1	#2	#3	#4	Controller

Routing Logic

Downstream		Port #1	Downstream		Port #4
		OC Sense			OC Sense
PHY #1	Switch Driver		PHY #4	Switch Driver
	LED Drivers			LED Drivers

Downstream	OC	Switch/LED	Downstream	OC	Switch/LED
USB Data	Sense	Drivers	USB Data	Sense	Drivers

Figure 2.1 - Block Diagram

SMSC USB20H04 Page 7 Revision 1.63 (03-30-07)

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