SH7263 Datasheet, PDF (1373/1862 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 25 USB 2.0 Host/Function Module (USB)
• Example 1 of writing fractional-width data: one 16-bit write operation followed by an 8-bit
write operation.
Start
[1]
Set MBW to 01
[2]
Write 16 bits of data
to FIFO port register
[3]
Set MBW to 00
[1] Specify the FIFO port access width as 16 bits.
[2] Write bits 31 to 16 when FEND = 0
and bits 15 to 0 when FEND = 1.
[3] Specify the FIFO port access width as 8 bits.
[4] Write bits 31 to 24 when FEND = 0
and bits 7 to 0 when FEND = 1.
[4]
Write 8 bits of data
to FIFO port register
End of writing
Figure 25.12 Example 1 of Writing Fractional-Width Data to the FIFO Port
• Example 2 of writing fractional-width data: three 8-bit write operations.
Start
[1]
Set MBW to 00
[2]
Write 8 bits of data three times
to FIFO port register
[1] Specify the FIFO port access width as 8 bits.
[2] Write bits 31 to 24 when FEND = 0
and bits 7 to 0 when FEND = 1.
End of writing
Figure 25.13 Example 2 of Writing Fractional-Width Data to the FIFO Port
Rev. 2.00 Mar. 14, 2008 Page 1339 of 1824
REJ09B0290-0200