SMSC USB20H04 - Manual (Page 7)

4-Port USB 2.0 Controller
Datasheet
SMSC USB20H04 Page 7 Revision 1.63 (03-30-07)
DATASHEET
Chapter 2 Functional Block Diagram
To Upstream
V
BUS
Upstream
PHY
Upstream
USB Data
Repeater
Controller SIE
Serial
Interface
PLL
24 MHz
Crystal
To EEPROM or
SMBus Master
Routing Logic
SCK SD
TT
#1
TT
#2
TT
#3
TT
#4
Port
Controller
Downstream
PHY #1
Port #1
OC Sense
Switch Driver
LED Drivers
Downstream
PHY #4
Port #4
OC Sense
Switch Driver
LED Drivers
Downstream
USB Data
OC
Sense
Switch/LED
Drivers
Downstream
USB Data
OC
Sense
Switch/LED
Drivers
Bus-Power
Detect/
V
BUS
Pulse
Pin
Selectable
Options
Internal
Configuration
Select
Figure 2.1 - Block Diagram