USB Registers
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16.5.7.12 LRAM0SIZE Register (offset = 84h) [reset = 0h]
LRAM0SIZE is shown in Figure 16-288 and described in Table 16-302.
Figure 16-288. LRAM0SIZE 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 REGION0_SIZE
R/W-0
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 16-302. LRAM0SIZE Register Field Descriptions
Bit Field Type Reset Description
13-0 REGION0_SIZE R/W-0 0 This field indicates the number of entries that are contained in the
linking RAM region 0.
A descriptor with index less than region0_size value has its linking
location in region 0.
A descriptor with index greater than region0_size has its linking
location in region 1.
The queue manager will add the index (left shifted by 2 bits) to the
appropriate regionX_base_addr to get the absolute
32-bit address to the linking location for a descriptor.
Queue Manager Linking Ram Region 0 Size Register
2120
Universal Serial Bus (USB) SPRUH73H–October 2011–Revised April 2013
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