36.7.28 USB RX FIFO Size Register
RXFIFOSZ controls the size of the selected RX endpoint FIFO.
Symbol | Description | Symbol | Description | Symbol | Description |
---|---|---|---|---|---|
R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
K | Write to clear | S | Software settable bit | — | — |
Name: | RXFIFOSZ |
Offset: | 0x1063 |
Reset: | 0x0000 |
Property: | PAC Write-Protection |
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
DPB | FIFOSZ[3:0] | ||||||||
Access | R/W | R/W | R/W | R/W | R/W | ||||
Reset | 0 | 0 | 0 | 0 | 0 |
Bit 4 – DPB RX Endpoint Double-packet Buffering Control bit
Value | Description |
---|---|
0 | Double-packet buffer is not supported |
1 | Double-packet buffer is supported. This doubles the size set in RXFIFOSZ. |
Bits 3:0 – FIFOSZ[3:0] RX Endpoint FIFO packet size bits
The maximum packet size to allowed for (before any splitting within the FIFO of Bulk/High-Bandwidth packets prior to transmission)
Value | Description |
---|---|
1111 | Reserved |
1010 | Reserved |
1001 | 4096 bytes |
1000 | 2048 bytes |
0111 | 1024 bytes |
0110 | 512 bytes |
0101 | 256 bytes |
0100 | 128 bytes |
0011 | 64 bytes |
0010 | 32 bytes |
0001 | 16 bytes |
0000 | 8 bytes |