USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications
Datasheet
VariSense, which controls the USB receiver sensitivity enabling programmable levels of USB signal
receive sensitivity. This capability allows operation in a sub-optimal system environment, such as when
a captive USB cable is used.
The USB3813 is available in commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature
range versions.
1.1
Block Diagram
Figure 1.1 details the internal block diagram of the USB3813.
To I2C Master/Slave
or EEPROM
Up or Downstream
Sda
Scl
VBAT
VDDCOREREG
VDDCR12
USB
ResetN
VDD33
AddrSel
IntN
Serial
Interface
3.3V Reg
1.2V Reg
Flex
PHY
USB
SIE
Controller
Upstream
Hub Logic
& Repeater
Multi-
TT
Port Controller
Routing & Port Re-Ordering Logic
CPU
COMPLEX
HSIC
Swap
Port
JTAG
USB
Port
USB
Port
Upstream
Battery
Charger
Detection
PLL
RefSel
ChgDetN
RefClk
HSIC
Down or
Upstream
USB
Downstream
USB
Downstream
JTAG/
SPI/
GPIO
Figure 1.1 System Block Diagram
Revision 1.0 (06-17-13)
8
SMSC USB3813
DATASHEET
SMSC [ SMSC CORPORATION ]
