Preliminary
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Registers
20.9.2.2.3 USB1 Status Register (USB1STAT)
The USB1 status register (USB1STAT) allows the CPU to check the voltage state level of
USB1_DRVVBUS pin.
Ths USB1 status register is shown in
and described in
.
Figure 20-89. USB1 Status Register (USB1STAT)
31
1
0
Reserved
drvvbus
R-0h
R-0h
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 20-101. USB1 Status Register (USB1STAT) Field Descriptions
Bits
Field
Description
31-1
Reserved
Always read as 0. Writes have no effect.
0
drvvbus
Current USB1_DRVVBUS value
20.9.2.2.4 USB1 IRQ_MERGED_STATUS Register (USB1IRQMSTAT)
The USB1 IRQ_MERGED_STATUS register (USB1IRQMSTAT) contains a merged status for all the
events for USB1. This register optimizes software accesses in a module where a large number of
events are associated to one IRQ line. The merged status is read-only, and does not need to be
actively cleared like the IRQ status. It will clear automatically.
The USB1 IRQ_MERGED_STATUS register is shown in
and described in
.
Figure 20-90. USB1 IRQ_MERGED_STATUS Register (USB1IRQMSTAT)
31
2
1
0
Reserved
Bank1
Bank0
R-0h
R-0h
R-0h
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 20-102. USB1 IRQ_MERGED_STATUS Register (USB1IRQMSTAT) Field Descriptions
Bits
Field
Value
Description
31-2
Reserved
0
Always read as 0. Writes have no effect.
1
Bank1
0
No events pending from IRQ_STATUS_1
1
At least one event is pending from IRQ_STATUS_1
0
Bank0
0
No events pending from IRQ_STATUS_0
1
At least one event is pending from IRQ_STATUS_0
1889
SPRUGX9 – 15 April 2011
Universal Serial Bus (USB)
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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