User's Manual

4.7 USB Interrupt Source Clear Register (INTCLRR)
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The USB Interrupt Source Clear Register (INTCLRR) is shown in Figure 22 and described in Table 23 .
Figure 22. USB Interrupt Source Clear Register (INTCLRR)
31 25 24 16
Reserved USB
R-0 W-0
15 13 12 8 7 5 4 0
Reserved RX Reserved TX
R-0 W-0 R-0 W-0
LEGEND: R = Read only; W = Write only; - n = value after reset
Table 23. USB Interrupt Source Clear Register (INTCLRR) Field Descriptions
Bit Field Value Description
31-25 Reserved 0 Reserved
24-16 USB 0-1FFh Write a 1 to clear equivalent USB interrupt source
Allows the CPU to acknowledge an interrupt source and turn it off
15-13 Reserved 0 Reserved
12-8 RX 0-1Fh Write a 1 to clear equivalent Receive endpoint interrupt source
Allows the CPU to acknowledge an interrupt source and turn it off
7-5 Reserved 0 Reserved
4-0 TX 0-Fh Write a 1 to clear equivalent Transmit endpoint interrupt source
Allows the CPU to acknowledge an interrupt source and turn it off
SPRUGH3 – November 2008 Universal Serial Bus (USB) Controller 87
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