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200ohm
10
LS1028A
5V0
USB
3.0
type C
USB 2_DRVVB US
USB 2_RESRE F
USB 2_PWRFAULT
USB 2_VB US
“USB2”
90
W
diff. imp.
USB 2_D_[P,M]
USB 2_ID
USB 2_TX_[P,M]
USB 2_RX_[P,M]
<=2A
USB2
NX5P3090
5V0
USB 1_DRVVB US
USB 1_RESRE F
USB 1_PWRFAULT
USB 1_VB US
“USB1”
90
W
diff. imp.
USB 1_DP,DM
USB 1_ID
USB 1_TXP,TXM
USB 1_RXP,RXM
<=2A
USB1
NX5P3090
USB
3.0
Type-A
200ohm
HS
Mux
CB TU02043
USB1_SEL
PTN5150A
CC1
CC2
EXT_SE L
TX1_[P,M]
TX2_[P,M]
RX1_[P,M]
RX2_[P,M]
CPLD
CON_DET
VB US_EN
USB2_ID
USB2_DRVVBUS
Figure 9. USB architecture
The PTN5150A (from NXP) is a small low-power configuration channel logic chip that detects (through CC1 and CC2 pins) and
indicates to the USB controller (through USB2_ID signal) if the USB2 Type C connector is configured as a device or host. The
PTN5150A is configured to operate the USB3 Type C port in DFP mode with default USB current capability (0.5 A / 0.9 A). To
support higher current on the Type C (USB2) port, the hardware configuration of PTN5150 and NX5P3090UK VBUS switch should
be changed. Refer to the device datasheet for more information.
The USBx_DRVVBUS and USBx_PWRFAULT pins of each USB controller are connected to a programmable-current USB switch,
NX5P3090UK (from NXP), for individual port management. The USB switch is powered from +5 V USB power supply. To indicate
power fault conditions, the USB switch sends PWRFAULT signals to the USB controller. For USB2 port, the USB switch drives
USB2 VBUS (USB2_VBUS) when USB2_DRVVBUS=1, USB1_ID = 0, and USB2_CON_DET=1, this logic is controlled by CPLD.
For USB1 port, the USB switch drives USB1 VBUS (USB1_VBUS) when USB1_DRVVBUS=1.
The maximum allowed current consumption of a USB connected device is 900 mA per channel.
Both, USB1 and USB2 connectors have an LED nearby, USB1_5V and USB2_5V, respectively, which are active when the +5 V
USB power supply is enabled to the connectors.
USB interface
QorIQ LS1028A Reference Design Board Reference Manual, Rev. b, 11/2018
NXP Semiconductors
COMPANY CONFIDENTIAL
25
Summary of Contents for QorIQ LS1028A
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