Information

USBx_PERID field descriptions
Field Description
7–6
Reserved
This read-only field is reserved and always has the value zero.
5–0
ID
Peripheral Identification
This field always reads 0x4h.
40.4.2 Peripheral ID Complement register (USBx_IDCOMP)
Reads back the complement of the Peripheral ID register. For the USB peripheral, the
value is 0xFB.
Addresses: USB0_IDCOMP is 4007_2000h base + 4h offset = 4007_2004h
Bit 7 6 5 4 3 2 1 0
Read 1 NID
Write
Reset
1 1 1 1 1 0 1 1
USBx_IDCOMP field descriptions
Field Description
7–6
Reserved
This read-only field is reserved and always has the value one.
5–0
NID
Ones complement of peripheral identification bits.
40.4.3 Peripheral Revision register (USBx_REV)
Contains the revision number of the USB module.
Addresses: USB0_REV is 4007_2000h base + 8h offset = 4007_2008h
Bit 7 6 5 4 3 2 1 0
Read REV
Write
Reset
0 0 1 1 0 0 1 1
USBx_REV field descriptions
Field Description
7–0
REV
Revision
Indicate the revision number of the USB Core.
Memory map/Register definitions
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
896 Freescale Semiconductor, Inc.