7643 datasheet(262/424 Pages) RENESAS

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262 / 424 page

Rev.2.00

Aug 28, 2006

page 141 of 202

7643 Group

REJ09B0133-0200

APPLICATION

2.6 USB

(5)

Application example 5: USB function interrupt routine

Outline: The following interrupts are assigned to the same vector.

- USB endpoint 0 interrupt

- USB endpoint x (x=1, 2) IN interrupt

- USB endpoint x (x=1, 2) OUT interrupt

- USB reset interrupt

- USB suspend interrupt

- USB resume interrupt

Make all of the following settings in order to enable the interrupts.

- Set USB function interrupt enable bit of interrupt control register A to “1”.

- Set the bits corresponding to USB interrupt enable registers 1 and 2 to “1”.

- Set the interrupt disable flag (I) to “0”.

Each interrupt is determined according to the contents of USB interrupt status registers

1 and 2 in the USB function interrupt routine. When “1”, the corresponding process

routine is executed.

The USB reset interrupt does not have a specified enable bit and is always in the enabled

state.

Figure 2.6.37 shows the related register settings and Figure 2.6.38 shows a control

procedure example.

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