Datasheet

VBUS
Detect
SuperSpeed HubUSB 2.0 Hub
USB_DP_UP
USB_SSRXP_UP
USB_SSRXM_UP
USB_SSTXP_UP USB_SSTXM_UP
USB_DM_UP
USB_SSRXP_DN0
USB_SSRXM_DN0
USB_SSTXP_DN0
USB_SSTXM_DN0
USB_SSRXP_DN1
USB_SSRXM_DN1
USB_SSTXP_DN1
USB_SSTXM_DN1
USB_SSRXP_DN2
USB_SSRXM_DN2
USB_SSTXP_DN2
USB_SSTXM_DN2
USB_SSRXP_DN3
USB_SSRXM_DN3
USB_SSTXP_DN3
USB_SSTXM_DN3
USB_DP_DN0
USB_DM_DN0
USB_DP_DN1
USB_DM_DN1
USB_DP_DN2
USB_DM_DN2
USB_DP_DN3
USB_DM_DN3
Oscilator
USB_R1
USB_R1RTN
USB_VBUS
XI
VSSOSC
XO
Clock
and
Reset
Distribution
Control
Registers
Boundary
Scan
Power
Distribution
JTAG_TRSTn
JTAG_TDI
JTAG_TDO
JTAG_TMS
JTAG_TCK
VDD33
VSS
GRSTz
I2C/
SMBUS
SCL/SMBCLK
SDA/SMDAT
SMBUSz
VDD11
GPIO
Block
PWRON0z_BATEN0
OVERCUR0z
SS
HS
HS_SUSPEND
SS_SUSPEND
FULLPWRMGMTz_SMBA1
Not Recommended for New Designs
TUSB8040
www.ti.com SLLSE42I –SEPTEMBER 2010–REVISED SEPTEMBER 2013
1.3 Functional Block Diagram
The TUSB8040PFP (QFP) is a reduced footprint hub that supports ganged power switching and over-
current protection only. A ganged hub switches on power to all its downstream ports when power is
required to be on for any port. The power to the downstream ports is not switched off unless all ports are
in a state that allows power to be removed. Also when a ganged hub senses an over-current event, power
to all downstream ports will be switched off. The TUSB8040PFP also provides customization using an I
2
C
EEPROM or configuration via an SMBus host for vendor specific PID, VID, and strings. Ports can also be
marked as disabled or permanently attached using an I
2
C EEPROM or an SMBus host.
The Device Status and Command Register at F8h cannot be modified by the contents of the I
2
C
EEPROM.
Figure 1-2. TUSB8040PFP Functional Block Diagram
Copyright © 2010–2013, Texas Instruments Incorporated PIN DESCRIPTIONS 7
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