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USB Registers
16.5.7.71 QUEUE_9_A Register (offset = 2090h) [reset = 0h]
QUEUE_9_A is shown in Figure 16-347 and described in Table 16-361.
Figure 16-347. QUEUE_9_A Register
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved QUEUE_ENTRY_COUNT
R-0
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 16-361. QUEUE_9_A Register Field Descriptions
Bit Field Type Reset Description
13-0 QUEUE_ENTRY_COUNT R-0 0 This field indicates how many packets are currently queued on the
queue.
This count is incremented by 1 whenever a packet is added to the
queue.
This count is decremented by 1 whenever a packet is popped from
the queue.
2179
SPRUH73H–October 2011–Revised April 2013 Universal Serial Bus (USB)
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