Sharp LH79524 - Frame Number Registers (Framex); Table 17-20. FRAME1 Register; Table 17-21. FRAME2 Register; Table 17-22. FRAME1 Fields

Universal Serial Bus Device LH79524/LH79525 User’s Guide
17-18 Version 1.0
17.2.2.9 Frame Number Registers (FRAMEx)
The FRAMEx registers store the current USB bus frame number. The frame number com-
prises 11 bits. FRAME1 holds the lower eight bits and FRAME2 holds the upper three bits.
Table 17-20. FRAME1 Register
BIT 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
FIELD ///
RESET 0000000000000000
TYPE RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
FIELD /// FRAME1
RESET 0000000000000000
TYPE RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO
ADDR
0xFFFF5000 + 0x030
Table 17-21. FRAME2 Register
BIT 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
FIELD ///
RESET 0000000000000000
TYPE RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
FIELD /// FRAME2
RESET 0000000000000000
TYPE RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO
ADDR 0xFFFF5000 + 0x034
Table 17-22. FRAME1 Fields
BIT FIELD DESCRIPTION
31:8 /// Reserved Reading returns 0. Write the reset value.
7:0 FRAME1 Frame 1 Least significant 8 bits of USB Frame Number.
Table 17-23. FRAME2 Fields
BIT FIELD DESCRIPTION
31:3 /// Reserved Reading returns 0. Write the reset value.
2:0 FRAME2 Frame 2 Most significant 3 bits of USB Frame Number