7643 datasheet(233/424 Pages) RENESAS

tên linh kiện	7643

Giải thích chi tiết về linh kiện	8-BIT SINGLE-CHIP MICROCOMPUTER

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Rev.2.00

Aug 28, 2006

page 112 of 202

7643 Group

REJ09B0133-0200

APPLICATION

2.6 USB

q SETUP_END flag

During a control transfer, if the process is terminated before the number of data bytes, as set

in the data stage process, is completed, the SETUP_END flag will go to “1”.

Clear the SETUP_END flag to “0” by setting the SERVICED_SETUP_END bit to “1”.

When this flag is set to “1”, you need to disable the access to the FIFO and execute the setup

process before it.

When this flag is set to “1”, the data in the IN FIFO is automatically flushed out.

If this flag and the OUT_PKT_RDY flag are set to “1” at the same time, it indicates that the

previous setup process has been completed and there is a new SETUP token in the FIFO.

q SERVICED_OUT_PKT_RDY bit

Setting this bit to “1” clears the OUT_PKT_RDY flag to “0”.

q SERVICED_SETUP_END bit

Setting this bit to “1” clears the SETUP_END flag to “0”.

Figure 2.6.14 shows the structure of the USB endpoint x (x = 0 to 2) IN control register.

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