Section 22 USB Function Module (USB)
Rev. 1.00 Mar. 12, 2008 Page 851 of 1178
REJ09B0403-0100
Bit Bit
Name
Initial
Value
R/W Description
1
EP2DMAE
0
R/W
Endpoint 2 DTC Transfer Enable
When this bit is set, DTC transfer is enabled from
memory to the endpoint 2 transmit FIFO buffer. If
there is at least one byte of space in the FIFO buffer,
the DTC start interrupt signal (USBINTN1) is asserted.
In DTC transfer, when 64 bytes are written to the
FIFO buffer the EP2 packet enable bit is set
automatically, allowing 64 bytes of data to be
transferred, and if there is still space in the other of
the two FIFOs, the DTC start interrupt signal
(USBINTN1) is asserted again. However, if the size of
the data packet to be transmitted is less than 64
bytes, the EP2 packet enable bit is not set
automatically, and so should be set by the CPU on a
DTC transfer end interrupt.
As EP2-related interrupt requests to the CPU are not
automatically masked, interrupt requests should be
masked as necessary in the interrupt enable register.
•
Operating procedure
1. Set the number of transfers in the DTC.
2. Set the DTC to be activated by USBINTN1.
3. Write 1 to this bit.
4. Activate
the
DTC.
5. DTC transfer is performed.
6. DTC transfer end interrupt is generated.
7. Write 0 to the EP1DMAE bit in DMA.
8. Write 0 to the EP1FULL bit in IFR0.
See section 22.8.3, DTC Transfer for Endpoint 2.
Содержание H8S Family
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Страница 206: ...Section 6 Bus Controller BSC Rev 1 00 Mar 12 2008 Page 158 of 1178 REJ09B0403 0100...
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Страница 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
Страница 588: ...Section 15 Serial Communication Interface with FIFO SCIF Rev 1 00 Mar 12 2008 Page 540 of 1178 REJ09B0403 0100...
Страница 632: ...Section 17 Synchronous Serial Communication Unit SSU Rev 1 00 Mar 12 2008 Page 584 of 1178 REJ09B0403 0100...
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Страница 804: ...Section 19 LPC Interface LPC Rev 1 00 Mar 12 2008 Page 756 of 1178 REJ09B0403 0100...
Страница 838: ...Section 20 Ethernet Controller EtherC Rev 1 00 Mar 12 2008 Page 790 of 1178 REJ09B0403 0100...
Страница 964: ...Section 24 RAM Rev 1 00 Mar 12 2008 Page 916 of 1178 REJ09B0403 0100...
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Страница 1098: ...Section 26 Boundary Scan JTAG Rev 1 00 Mar 12 2008 Page 1050 of 1178 REJ09B0403 0100...
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