Section 23
USB 2.0 Host/Function Module (USB)
Rev. 0.50 May 18, 2006 Page 1177 of 1588
REJ09B0313-0050
Table 23.19 Timing at which BRDY Interrupts are Generated
Register setting
Buffer State
When Packet is Received
BFRE
=
0
BFRE
=
1
Buffer full (normal packet received) When packet is received
Not generated
Zero-length packet received
When packet is received
When packet is received
Normal short packet received
When packet is received
When reading of the received
data from the buffer memory
has been completed
Transaction count ended
When packet is received
When reading of the received
data from the buffer memory
has been completed
Note: This function is valid only in the reading direction of reading from the buffer memory. In the
writing direction, the BFRE bit should be fixed at 0.
(4) Timing at which the FIFO Port can be Accessed
(a) Timing at which the FIFO Port can be Accessed when Switching Pipes
Figure 23.12 shows a diagram of the timing up to the point where the FRDY and DTLN bits are
determined when the pipe specified by the FIFO port has been switched (the CURPIPE bit in
C/DnFIFOSEL has been changed).
If the CURPIPE bits have been changed, access to the FIFO port should be carried out after
waiting 450 ns and 8 clock cycles at a peripheral clock after writing to C/DnFIFOSEL.
The same timing applies with respect to the CFIFO port, when the ISEL bit is changed.
Содержание Single-Chip Microcomputer SH7203
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Страница 726: ...Section 14 Realtime Clock RTC Rev 0 50 May 18 2006 Page 696 of 1588 REJ09B0313 0050 ...
Страница 796: ...Section 15 Serial Communication Interface with FIFO SCIF Rev 0 50 May 18 2006 Page 766 of 1588 REJ09B0313 0050 ...
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Страница 1054: ...Section 21 D A Converter DAC Rev 0 50 May 18 2006 Page 1024 of 1588 REJ09B0313 0050 ...
Страница 1226: ...Section 23 USB 2 0 Host Function Module USB Rev 0 50 May 18 2006 Page 1196 of 1588 REJ09B0313 0050 ...
Страница 1294: ...Section 24 LCD Controller LCDC Rev 0 50 May 18 2006 Page 1264 of 1588 REJ09B0313 0050 ...
Страница 1386: ...Section 26 I O Ports Rev 0 50 May 18 2006 Page 1356 of 1588 REJ09B0313 0050 ...
Страница 1512: ...Section 30 List of Registers Rev 0 50 May 18 2006 Page 1482 of 1588 REJ09B0313 0050 ...
Страница 1598: ...Section 31 Electrical Characteristics Rev 0 50 May 18 2006 Page 1568 of 1588 REJ09B0313 0050 ...
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