USB2503-HZH Datasheet, PDF (9/43 Pages) SMSC Corporation – Integrated USB 2.0 Compatible 3-Port Hub

Integrated USB 2.0 Compatible 3-Port Hub
Datasheet
Chapter 4 3-Port Hub Block Diagram
Upstream Upstream 24 MHz
USB Data V_BUS Crystal
3.3V
To
Pin ^EEPROM
1.8V Strapping ^{or SMBus}
Cap Options ^Master
SD SCL
V_BUS
Upstream ^Power
PLL
1.8V
Reg.
PHY
Detect
Repeater
SIE
Internal
Defaults
Select
Serial
Interface
Controller
TT TT TT
#1 #2 #3
Port
Controller
Routing Logic
... ^{Port #1}
Downstream OC Sense
Port #3
Downstream OC Sense
PHY #1 Switch Driver
PHY #3 Switch Driver
LED Drivers
LED Drivers
Downstream OC Switch/LED
USB Data Sense Drivers
Downstream OC Switch/LED
USB Data Sense Drivers
Figure 4.1 3-Port Block Diagram
NAME
USB Bus Data
Detect Upstream
VBUS Power
Table 4.1 3-Port Hub Pin Descriptions
SYMBOL
TYPE
FUNCTION
UPSTREAM USB 2.0 INTERFACE
USBDN0
USBDP0
VBUS_DET
IO-U
These pins connect to the USB bus data signals.
I/O12
Detects state of Upstream VBUS power (indicates the
power-managed state of the upstream device).
SMSC USB2503/USB2503A
9
DATASHEET
Revision 2.3 (08-27-07)