Datasheet

TUSB8040A
www.ti.com SLLSEA7F –MAY 2012–REVISED SEPTEMBER 2013
Table 2-4. USB Downstream Signals (continued)
PIN
SIGNAL NAME TYPE DESCRIPTION
NO.
USB Port 2 Power On Control for Downstream Power/Battery Charging Enable. The
terminal is used for control of the downstream power switch for Port 2. In addition, the value
of the terminal is sampled at the de-assertion of reset to determine the value of the battery
PWRON2z_BATEN2 I/O, PD B20
charger support for Port 2 as indicated in the Battery Charger Support register:
0 = Battery Charging Not Supported
1 = Battery Charging Supported
USB Downstream Port 2 Over-Current Detection.
0 = An overcurrent event has occurred
1 = An overcurrent event has not occurred
OVERCUR2z I, PU B22
This terminal should be pulled high using a 10-kΩ resistor if power management is not
implemented. If power management is enabled, the external circuitry needed should be
determined by the power management device.
USB_SSTXP_DN3 O B31 USB SuperSpeed transmitter differential pair (positive)
USB_SSTXM_DN3 O A34 USB SuperSpeed transmitter differential pair (negative)
USB_SSRXP_DN3 I B30 USB SuperSpeed receiver differential pair (positive)
USB_SSRXM_DN3 I A33 USB SuperSpeed receiver differential pair (negative)
USB_DP_DN3 I/O B29 USB High-speed differential transceiver (positive)
USB_DM_DN3 I/O A31 USB High-speed differential transceiver (negative)
USB Port 3 Power On Control for Downstream Power/Battery Charging Enable. The
terminal is used for control of the downstream power switch for Port 3. In addition, the value
of the terminal is sampled at the de-assertion of reset to determine the value of the battery
PWRON3z_BATEN3 I/O, PD A22
charger support for Port 3 as indicated in the Battery Charger Support register:
0 = Battery Charging Not Supported
1 = Battery Charging Supported
USB Downstream Port 3 Over-Current Detection.
0 = An overcurrent event has occurred
1 = An overcurrent event has not occurred
OVERCUR3z I, PU A24
This terminal should be pulled high using a 10K resistor if power management is not
implemented. If power management is enabled, the external circuitry needed should be
determined by the power management device.
USB Port 0 Amber LED Indicator & Device Removable Configuration Bit
LEDA0z_RMBL0 I, PU B23 1 = Device is Removable
0 = Device is NOT Removable
USB Port 1 Amber LED Indicator & Device Removable Configuration Bit
LEDA1z_RMBL1 I/O, PU B25 1 = Device is Removable
0 = Device is NOT Removable
USB Port 2 Amber LED Indicator & Device Removable Configuration Bit
LEDA2z_RMBL2 I/O, PU B26 1 = Device is Removable
0 = Device is NOT Removable
USB Port 3 Amber LED Indicator & Device Removable Configuration Bit
LEDA3z_RMBL3 I/O, PU B27 1 = Device is Removable
0 = Device is NOT Removable
USB Port 0 Green LED Indictor & Port Used Configuration Bit
LEDG0z_USED0 I/O, PU A25 1 = Port Used
0 = Port is NOT Used
USB Port 1 Green LED Indictor & Port Used Configuration Bit
LEDG1z_USED1 I/O, PU A27 1 = Port Used
0 = Port is NOT Used
Copyright © 2012–2013, Texas Instruments Incorporated PIN DESCRIPTIONS 11
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