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USB3803 Datasheet(PDF) 16 Page - Microchip Technology

Part # USB3803
Description  USB 2.0 High-Speed Hub Controller Optimized
PDF  99 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB3803 Datasheet(HTML) 16 Page - Microchip Technology

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USB3803
DS00001691B-page 16
 2014-2015 Microchip Technology Inc.
FIGURE 4-1:
MODES OF OPERATION FLOWCHART
Hub Communication Stage
(USB Traffic)
Hub Battery Charger Detection Stage
Hub Connect Stage
Hub Configuration Stage
Hub Wait RefClk Stage
Start
(SOC Set Pin RESET_N=0)
System Detects
VBUS/Cable
Inserted?
N
PMIC/SOC
Battery Charger Detection
(or other switch function)
SOC Set Pin RESET_N=1
SOC Set Pin BYPASS_N=0
Y
SOC Set RESET_N=1
SOC Set BYPASS_N=1
Hub Enables Pullup Reistor
Host Enumerates and
Configures Hub
Host Initiates Data Transfers
to Downstream Devices
System identifies loss of
VBUS (cable removal)
SOC Set Pin RESET_N=0
SOC Set Pin BYPASS_N=0
System
Detects VBUS
Present?
Y
N
Legend
Bypass
Mode
(USB3803C
ONLY)
Hub Mode
Standby
Mode
Hub Initialization Stage
Core Regulator Enabled
Power-On-Reset
PLL Synchronization
Timeout or
I2C Write
SP_ILOCK.
config_n
=1
I2C Write
Wait for
I2C bit
SP_ILOCK.config_n
=0
Hub Charger Detection
Integrated Battery Charger
Detection
Timeout
0
BCHGMODE.
EnableChrgDet
1
SP_ILOCK.
config_n
0
1
REF_CLK available
N
Default Charger
Detection
-
Run on Ring Oscillator
with default settings
BCHGMODE
.Enable
ChrgDet
1
Wait for
REF_CLK
0
Y
Wait for Pin
HUB_CONNECT=1
OR I2C bit
SP_ILOCK.connect_n
=0



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