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USBx_USBCTRL field descriptions (continued)
Field
Description
0
USB DP/DM signals used as UART TX/RX.
1
USB DP/DM signals used as UART RX/TX.
4
UARTSEL
Selects USB signals to be used as UART signals.
0
USB signals not used as UART signals.
1
USB signals used as UART signals.
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
51.4.25 USB OTG Observe register (USBx_OBSERVE)
Provides visibility on the state of the pull-ups and pull-downs at the transceiver. Useful
when interfacing to an external OTG control module via a serial interface.
Address: 4005_5000h base + 104h offset = 4005_5104h
Bit
7
6
5
4
3
2
1
0
Read
Write
Reset
0
1
0
1
0
0
0
0
USBx_OBSERVE field descriptions
Field
Description
7
DPPU
Provides observability of the D+ Pullup enable at the USB transceiver.
0
D+ pullup disabled.
1
D+ pullup enabled.
6
DPPD
Provides observability of the D+ Pulldown enable at the USB transceiver.
0
D+ pulldown disabled.
1
D+ pulldown enabled.
5
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
4
DMPD
Provides observability of the D- Pulldown enable at the USB transceiver.
0
D– pulldown disabled.
1
D– pulldown enabled.
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
Memory map/Register definitions
K32 L2A Reference Manual, Rev. 2, 01/2020
1326
NXP Semiconductors
Содержание K32 L2A Series
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