Section 23
USB 2.0 Host/Function Module (USB)
Rev. 0.50 May 18, 2006 Page 1157 of 1588
REJ09B0313-0050
(7) VBUS
Interrupt
If there has been a change in the VBUS pin, the VBUS interrupt is generated. The level of the
VBUS pin can be checked with the VBSTS bit in INTSTS0. Whether the host controller is
connected or disconnected can be confirmed using the VBUS interrupt. However, if the system is
activated with the host controller connected, the first VBUS interrupt is not generated because
there is no change in the VBUS pin.
(8) Resume
Interrupt
The RESM interrupt is generated when the device state is the suspended state, and the USB bus
state has changed (from J-state to K-state, or from J-state to SE0). Recovery from the suspended
state is detected by means of the resume interrupt.
(9) BCHG
Interrupt
The BCHG interrupt is generated when the USB bus state has changed. The BCHG interrupt can
be used to detect whether or not the peripheral device is connected when the host controller
function has been selected and can also be used to detect a remote wakeup. The BCHG interrupt is
generated regardless of whether the host controller function or function controller function has
been selected.
(10) DTCH Interrupt
The DTCH interrupt is generated if disconnection of the device is detected during full-speed
operation when the host controller function has been selected. The DTCH interrupt is not
generated during high-speed operation. To detect disconnection during high-speed operation,
additional processing is necessary, such as performing periodic control transfers of standard
requests and determining disconnection if no response is returned from the peripheral side.
Detachment in the suspended state can be detected using the BCHG interrupt.
(11) SACK Interrupt
The SACK interrupt is generated when an ACK response for the transmitted setup packet has been
received from the peripheral side with the host controller function selected. The SACK interrupt
can be used to confirm that the setup transaction has been completed successfully.
Содержание Single-Chip Microcomputer SH7203
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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 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 ...
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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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