USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications
Datasheet
(HW_INIT)
YES
REFCLK
Present
NO
(SW_INIT)
Dead Battery
Bond Option
YES
External
SPI ROM
present?
YES
NO
NO
Load BC registers
On RO
(BC_INIT)
Run from
Internal ROM
Run From
External SPI ROM
Run BC Detect
On RO
YES
SMBus or I2C
Present?
NO
YES
NO
REFCLK
Present
Config Load
From Internal ROM
Do SMBus or I2C
Initialization
(WAITREF)
NO
SOC Done?
YES
Combine OTP
Config Data
(CONFIG)
(SOC_CFG)
SW Upstream
BC detection
(CHGDET)
Hub Connect
(Hub.Connect)
Normal
operation
Figure 5.1 Hub Operational Mode Flowchart
Revision 1.0 (06-17-13)
20
SMSC USB3813
DATASHEET