K60P100M100SF2RM Datasheet, PDF (1259/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 45 Universal Serial Bus OTG Controller (USBOTG)
45.4.16 BDT Page Register 1 (USBx_BDTPAGE1)
The Buffer Descriptor Table Page Register 1 provides address bits 15 through 9 of the
base address where the current Buffer Descriptor Table (BDT) resides in system memory.
The 32-bit BDT Base Address is always aligned on 512-byte boundaries, so bits 8
through 0 of the base address are always taken as zero.
Addresses: USB0_BDTPAGE1 is 4007_2000h base + 9Ch offset = 4007_209Ch
Bit
7
6
5
4
3
2
1
0
Read
0
BDTBA
Write
Reset
0
0
0
0
0
0
0
0
USBx_BDTPAGE1 field descriptions
Field
7–1
BDTBA
0
Reserved
Description
This field provides address bits 15 through 9 of the BDT base address.
This read-only field is reserved and always has the value zero.
45.4.17 Frame Number Register Low (USBx_FRMNUML)
The Frame Number Register (Low and High) contains an 11-bit value used to compute
the address where the current Buffer Descriptor Table (BDT) resides in system memory.
Addresses: USB0_FRMNUML is 4007_2000h base + A0h offset = 4007_20A0h
Bit
7
6
5
4
3
2
1
0
Read
Write
FRM[7:0]
Reset
0
0
0
0
0
0
0
0
USBx_FRMNUML field descriptions
Field
7–0
FRM[7:0]
Description
This 8-bit field and the 3-bit field in the Frame Number Register High are used to compute the address
where the current Buffer Descriptor Table (BDT) resides in system memory.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1259