NXP Semiconductors K22F series - USB OTG Observe Register (Usbx_Observe); USB OTG Control Register (Usbx_Control)

43.4.25 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: 4007_2000h base + 104h offset = 4007_2104h
Bit 7 6 5 4 3 2 1 0
Read DPPU DPPD 0 DMPD 0 0
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.
3–1
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
0
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
43.4.26 USB OTG Control register (USBx_CONTROL)
Address: 4007_2000h base + 108h offset = 4007_2108h
Bit 7 6 5 4
Read 0
DPPULLUPNONOTG
Write
Reset
0 0 0 0
Bit
3 2 1 0
Read 0
Write
Reset
0 0 0 0
Memory map/Register definitions
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
1104 NXP Semiconductors