Texas Instruments TUSB8040AEVM User Manual page 8

Configuration Switches
SW1_3 (off): SCL (Serial Clock) Switch. The TUSB8040A has an internal pull down on this terminal, so
the serial EEPROM/SMBUS interface is disabled. If the switch is set to the ON position, a pull up resistor
is connected to the serial clock terminal to indicate that an I
pull up resistor on SDA).
The SCL_SMBCLK terminal is also sampled at the deassertion of reset to determine if USB 3.0
SuperSpeed low power states U1 and U2 initiation is disabled. If SCL_SMBCLK is high, U1 and U2 low
power state initiation is disabled. If SCL_SMBCLK is low, U1 and U2 low power states are completely
enabled. If the optional EEPROM or SMBUS is implemented, the value of the u1u2TimerOvr bit of the
Device Configuration Register determines if the low power state initiation is enabled.
SW1_4 (off): SDA (Serial Data) Switch. The TUSB8040A has an internal pull down on this terminal, so
the serial EEPROM/SMBUS interface is disabled. If the switch is set to the ON position, a pull up resistor
is connected to the serial clock terminal to indicate that an I
pull up resistor on SCL).
The SDA_SMBDAT terminal is also sampled at the deassertion of reset to determine if the USB 3.0
SuperSpeed low power states U1 and U2 are disabled. If SDA_SMBDAT is high, U1 and U2 low power
states are completely disabled. If SDA_SMBDAT is low, U1 and U2 low power states are enabled. If the
optional EEPROM or SMBUS is implemented, the value of the u1u2Disable bit of the Device Configuration
Register determines if the low power state U1 and U2 are enabled. Note that disabling U1 and U2 via the
SDA_SMBDAT terminal, overrides the U1 and U2 initiation disable of the SCL_SMBCLK terminal.
SW1_5 (off): PWRz_BAT1 Switch. The TUSB8040A has an internal pull down on this terminal, so USB
Battery Charging mode on Port 1 is disabled by default. If the switch is set to the ON position, the terminal
is pulled high and battery charging is enabled on downstream port 1.
SW1_6 (off): PWRz_BAT2 Switch. The TUSB8040A has an internal pull down on this terminal, so USB
Battery Charging mode on Port 2 is disabled by default. If the switch is set to the ON position, the terminal
is pulled high and battery charging is enabled on downstream port 2.
SW1_7 (off): PWRz_BAT3 Switch. The TUSB8040A has an internal pull down on this terminal, so USB
Battery Charging mode on Port 3 is disabled by default. If the switch is set to the ON position, the terminal
is pulled high and battery charging is enabled on downstream port 3.
SW1_8 (off): PWRz_BAT4 Switch. The TUSB8040A has an internal pull down on this terminal, so USB
Battery Charging mode on Port 4 is disabled by default. If the switch is set to the ON position, the terminal
is pulled high and battery charging is enabled on downstream port 4.
SW2_1 (off): USED1 Switch. The TUSB8040A has an internal pull up on this terminal, so Port 1 is
enabled by default. If the switch is set to the ON position, the terminal is pulled low, Port 1 is disabled and
the TUSB8040A will report as 3 port hub (or less if other USEDx terminals are set low).
SW2_2 (off): USED2 Switch. The TUSB8040A has an internal pull up on this terminal, so Port 2 is
enabled by default. If the switch is set to the ON position, the terminal is pulled low, Port 2 is disabled and
the TUSB8040A will report as 3 port hub (or less if other USEDx terminals are set low).
SW2_3 (off): USED3 Switch. The TUSB8040A has an internal pull up on this terminal, so Port 3 is
enabled by default. If the switch is set to the ON position, the terminal is pulled low, Port 3 is disabled and
the TUSB8040A will report as 3 port hub (or less if other USEDx terminals are set low).
SW2_4 (off): USED4 Switch. The TUSB8040A has an internal pull up on this terminal, so Port 4 is
enabled by default. If the switch is set to the ON position, the terminal is pulled low, Port 4 is disabled and
the TUSB8040A will report as 3 port hub (or less if other USEDx terminals are set low).
SW2_5 (off): RMBL1 Switch. The TUSB8040A has an internal pull up on this terminal, so any devices
connected to Port 1 are reported as removable by default. If the switch is set to the ON position, the
terminal is pulled low and the TUSB8040A will report a device connected to Port 1 as non-removable.
SW2_6 (off): RMBL2 Switch. The TUSB8040A has an internal pull up on this terminal, so any devices
connected to Port 2 are reported as removable by default. If the switch is set to the ON position, the
terminal is pulled low and the TUSB8040A will report a device connected to Port 2 as non-removable.
SW2_7 (off): RMBL3 Switch. The TUSB8040A has an internal pull up on this terminal, so any devices
connected to Port 3 are reported as removable by default. If the switch is set to the ON position, the
terminal is pulled low and the TUSB8040A will report a device connected to Port 3 as non-removable.
8
Hardware Set Up
Copyright © 2012, Texas Instruments Incorporated
2
C EEPROM may be attached (along with a
2
C EEPROM may be attached (along with a
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SLLU163 – May 2012