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Table 53. Receive Endpoint n Configuration Register (EPn_RX) (Continued)
Bit
Name
13:12
EPn_RX_SIZE
SPRU761A
Description
The receive endpoint n size field contains the endpoint n FIFO size value.
Status flags (STAT_FLG.NON_ISO_FIFO_EMPTY,
STAT_FLG.NON_ISO_FIFO_FULL, STAT_FLG. ISO_FIFO_EMPTY, and
STAT_FLG.ISO_FIFO_FULL) and overrun and underrun conditions are
based on this value for all OUT transactions to endpoint n.
Non-ISO: 00: 8 bytes
ISO: 000: 8 bytes
[13:12] 01: 16 bytes
[14:12] 001: 16 bytes
10: 32 bytes
010: 32 bytes
11: 64 bytes
011: 64 bytes
100: 128 bytes
101: 256 bytes
110: 512 bytes
111: 1023 bytes
Warning: For ISO endpoints, a size of 1023 bytes takes up the whole
memory and prevents it from being programmed with a 2K-byte USB
device controller.
Values after USB device controller hardware reset or USB reset are
unchanged (which means that values are unknown until first write access).
USB Device Controller
Universal Serial Bus (USB)
105
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