K60P100M100SF2RM Datasheet, PDF (1264/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Memory Map/Register Definitions
45.4.24 USB Control Register (USBx_USBCTRL)
Addresses: USB0_USBCTRL is 4007_2000h base + 100h offset = 4007_2100h
Bit
7
6
5
4
3
2
1
0
Read
0
SUSP
PDE
Write
Reset
1
1
0
0
0
0
0
0
USBx_USBCTRL field descriptions
Field
7
SUSP
6
PDE
5–0
Reserved
Description
Places the USB transceiver into the suspend state.
0 USB transceiver is not in suspend state.
1 USB transceiver is in suspend state.
Enables the weak pulldowns on the USB transceiver.
0 Weak pulldowns are disabled on D+ and D-
1 Weak pulldowns are enabled on D+ and D-.
This read-only field is reserved and always has the value zero.
45.4.25 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.
Addresses: USB0_OBSERVE is 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
7
DPPU
6
DPPD
Description
Provides observability of the D+ Pull Up signal output from the USB OTG module.
0 D+ pullup disabled.
1 D+ pullup enabled.
Provides observability of the D+ Pull Down signal output from the USB OTG module.
0 D+ pulldown disabled.
1 D+ pulldown enabled.
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1264
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.