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Section 18 Universal Serial Bus Interface (USB)
18.6
Usage Notes
1. When activating the DTC by a USB interrupt source, correct operation is not guaranteed if the
DISEL bit in DTC mode register B (MRB) is cleared to 0. Be sure to set the DISEL bit to
before DTC activation.
2. USB module operation can be enabled or disabled by the SMSTPB1 bit in subchip module
stop control register BL (SUBMSTPBL). In the initial state, USB module operation is enabled.
The USB module registers can be accessed by clearing module stop mode.
3. It is not recommended to use the USB simultaneously with the A/D converter or D/A converter
because the bus driver/receiver power supply pin DrVCC/DrVSS is shared with the analog
power supply pin AVCC/AVSS.
Rev. 3.00 Jan 25, 2006 page 626 of 872
REJ09B0286-0300
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