Datasheet

TUSB8040A
SLLSEA7F –MAY 2012–REVISED SEPTEMBER 2013 www.ti.com
2.4 USB Downstream Signals
Table 2-4. USB Downstream Signals
PIN
SIGNAL NAME TYPE DESCRIPTION
NO.
USB_SSTXP_DN0 O B4 USB SuperSpeed transmitter differential pair (positive)
USB_SSTXM_DN0 O A4 USB SuperSpeed transmitter differential pair (negative)
USB_SSRXP_DN0 I B3 USB SuperSpeed receiver differential pair (positive)
USB_SSRXM_DN0 I A3 USB SuperSpeed receiver differential pair (negative)
USB_DP_DN0 I/O B1 USB high-speed differential transceiver (positive)
USB_DM_DN0 I/O A1 USB high-speed differential transceiver (negative)
USB Port 0 Power On Control for Downstream Power/Battery Charging Enable.
The terminal is used for control of the downstream power switch; in addition, the value of
the terminal is sampled at the de-assertion of reset to determine the value of the battery
charger support for the port as indicated in the Battery Charger Support register:
0 = Battery charging not supported
PWRON0z_BATEN0 I/O, PD B19
1 = Battery charging supported
This terminal provides the port power control for all downstream ports if GANGED_SMBA2
= 1. This terminal also determines the battery charging support of all downstream ports if
GANGED_SMBA2 = 1.
USB Port 0 over-current detection.
0 = An overcurrent event has occurred
1 = An overcurrent event has not occurred
OVERCUR0z I, PU B21
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 switch.
USB_SSTXP_DN1 O B34 USB SuperSpeed transmitter differential pair (positive)
USB_SSTXM_DN1 O A37 USB SuperSpeed transmitter differential pair (negative)
USB_SSRXP_DN1 I B33 USB SuperSpeed receiver differential pair (positive)
USB_SSRXM_DN1 I A36 USB SuperSpeed receiver differential pair (negative)
USB_DP_DN1 I/O B36 USB High-speed differential transceiver (positive)
USB_DM_DN1 I/O A39 USB High-speed differential transceiver (negative)
USB Port 1 Power On Control for Downstream Power/Battery Charging Enable. The
terminal is used for control of the downstream power switch for Port 1. In addition, the value
of the terminal is sampled at the de-assertion of reset to determine the value of the battery
PWRON1z_BATEN1 I/O, PD A21
charger support for Port 1 as indicated in the Battery Charger Support register:
0 = Battery Charging Not Supported
1 = Battery Charging Supported
USB Downstream Port 1 Over-Current Detection.
0 = An overcurrent event has occurred
1 = An overcurrent event has not occurred
OVERCUR1z I, PU A23
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_DN2 O B7 USB SuperSpeed transmitter differential pair (positive)
USB_SSTXM_DN2 O A8 USB SuperSpeed transmitter differential pair (negative)
USB_SSRXP_DN2 I B6 USB SuperSpeed receiver differential pair (positive)
USB_SSRXM_DN2 I A7 USB SuperSpeed receiver differential pair (negative)
USB_DP_DN2 I/O A9 USB High-speed differential transceiver (positive)
USB_DM_DN2 I/O B9 USB High-speed differential transceiver (negative)
10 PIN DESCRIPTIONS Copyright © 2012–2013, Texas Instruments Incorporated
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