Table 17-20. Frame1 Register; Table 17-21. Frame2 Register; Table 17-22. Frame1 Fields; Table 17-23. Frame2 Fields - Sharp LH79524 User Manual

Universal Serial Bus Device

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.
BIT
FIELD
RESET
TYPE
BIT
FIELD
RESET
TYPE
ADDR
BIT
FIELD
RESET
TYPE
BIT
FIELD
RESET
TYPE
ADDR
BIT
31:8
7:0
BIT
31:3
2:0
17-18

Table 17-20. FRAME1 Register

31 30 29 28 27
0 0 0 0 0
RO RO RO RO RO
15 14 13 12 11
///
0 0 0 0 0
RO RO RO RO RO

Table 17-21. FRAME2 Register

31 30 29 28 27
0 0 0 0 0
RO RO RO RO RO
15 14 13 12 11
0 0 0 0 0
RO RO RO RO RO

Table 17-22. FRAME1 Fields

FIELD
///
FRAME1

Table 17-23. FRAME2 Fields

FIELD
/// Reserved Reading returns 0. Write the reset value.
FRAME2 Frame 2 Most significant 3 bits of USB Frame Number
Version 1.0
26 25 24 23
///
0 0 0 0
RO RO RO RO
10 9 8 7
0 0 0 0
RO RO RO RO
0xFFFF5000 + 0x030
26 25 24 23
///
0 0 0 0
RO RO RO RO
10 9 8 7
///
0 0 0 0
RO RO RO RO
0xFFFF5000 + 0x034
DESCRIPTION
Reserved Reading returns 0. Write the reset value.
Frame 1 Least significant 8 bits of USB Frame Number.
DESCRIPTION
LH79524/LH79525 User's Guide
22 21 20 19 18
0 0 0 0 0
RO RO RO RO RO
6 5 4 3 2
FRAME1
0 0 0 0 0
RO RO RO RO RO
22 21 20 19 18
0 0 0 0 0
RO RO RO RO RO
6 5 4 3 2
0 0 0 0 0
RO RO RO RO RO
17 16
0 0
RO RO
1 0
0 0
RO RO
17 16
0 0
RO RO
1 0
FRAME2
0 0
RO RO