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CHAPTER 12 USB HOST
12.4 Register of USB HOST
[bit 1] DIRQ: Cutting interrupt request
It is shown to have detected cutting the device. When it becomes "1", it gets back to "0" by writing "0"
to it. When you write "1" to it, the current state will be preserved. If the DIRE bit in the host control
register 0 (HCNT0) is "1", an interrupt is generated when it is "1". The interrupt signal is cleared when
it is cleared with "0".
It is not initialized with the RST bit in the UDC control register (UDCC).
[bit 0] SOFIRQ: SOF interruption requests
Whether the SOF token was begun is shown. When it becomes "1", it gets back to "0" by writing "0" to
it. When you write "1" to it, the current state will be preserved. If the SOFIRE bit in the host control
register 0 (HCNT0) is "1", an interrupt is generated when it is "1". The interrupt signal is cleared when
it is cleared with "0".
To update them, you must set the RST bit in the UDC control register (UDCC) to "0".
256
DIRQ
0
There is no interrupt request by device cutting detection.
1
There is interrupt request by device cutting detection.
SOFIRQ
0
There is no interrupt request by SOF token beginning.
1
There is an interrupt request by the SOF token beginning.
FUJITSU MICROELECTRONICS LIMITED
MB90335 Series
Operation mode
Operation mode
CM44-10137-6E
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