35.8.6.12 FIFO Space
| 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: | FIFOSPACE |
| Offset: | 0x34 |
| Reset: | 0x0000 |
| Property: | - |
This register allows the user to identify the number of bytes present in each TX and RX FIFO.
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| RXSPACE[4:0] | |||||||||
| Access | R | R | R | R | R | ||||
| Reset | 0 | 0 | 0 | 0 | 0 | ||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| TXSPACE[4:0] | |||||||||
| Access | R | R | R | R | R | ||||
| Reset | 0 | 0 | 0 | 0 | 0 | ||||
Bits 12:8 – RXSPACE[4:0] RX FIFO Filled Space
These bits return the number filled locations in the RX FIFO (bytes or words, depending on CTRLC.DATA32B setting).
Bits 4:0 – TXSPACE[4:0] TX FIFO Empty Space
These bits return the number of available locations in the TX FIFO (bytes or words, depending on CTRLC.DATA32B setting).