7641_06 Datasheet, PDF (360/385 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

7641 Group
APPENDIX
3.5 Control registers
USB frame number register Low
b7 b6 b5 b4 b3 b2 b1 b0
USB frame number register Low
(USBSOFL : address 5616)
b
0 FN0
Name
1 FN1
2 FN2
3 FN3
4 FN4
5 FN5
6 FN6
7 FN7
Functions
Contains the low-order 8 bits of SOF
token frame number.
At reset R W
0
✕
0
✕
0
✕
0
✕
0
✕
0
✕
0
✕
0
✕
USB frame number register High
b7 b6 b5 b4 b3 b2 b1 b0
USB frame number register High
(USBSOFH : address 5716)
b
0 FN8
Name
1 FN9
Functions
Contains the high-order 3 bits of SOF
token frame number.
At reset R W
0
✕
0
✕
2 FN10
0
✕
3 _{Nothing is arranged for these bits. These are write disable bits. When} 0
✕
these bits are read out, the contents are “0”.
4
0
✕
5
0
✕
6
0
✕
7
0
✕
Fig. 3.5.53 Structure of USB frame nmber registers Low, High
Rev.2.00 Aug 28, 2006 page 81 of 108
REJ09B0336-0200