Datasheet

Bits Name Description Type Reset
27:24 TXSTALL State machine has stalled on empty TX FIFO. Write 1 to
clear.
WC 0x0
23:20 Reserved. - - -
19:16 TXOVER TX FIFO overflow has occurred. Write 1 to clear. WC 0x0
15:12 Reserved. - - -
11:8 RXUNDER RX FIFO underflow has occurred. Write 1 to clear. WC 0x0
7:4 Reserved. - - -
3:0 RXSTALL State machine has stalled on full RX FIFO. Write 1 to clear. WC 0x0
FLEVEL Register
Description
FIFO levels
Table 364. FLEVEL
Register
Bits Name Description Type Reset
31:28 RX3 RO 0x0
27:24 TX3 RO 0x0
23:20 RX2 RO 0x0
19:16 TX2 RO 0x0
15:12 RX1 RO 0x0
11:8 TX1 RO 0x0
7:4 RX0 RO 0x0
3:0 TX0 RO 0x0
TXF0, TXF1, TXF2, TXF3 Registers
Description
Direct write access to the TX FIFO for this state machine. Each write pushes one word to the FIFO.
Table 365. TXF0,
TXF1, TXF2, TXF3
Registers
Bits Name Description Type Reset
31:0 NONAME WF 0x00000000
RXF0, RXF1, RXF2, RXF3 Registers
Description
Direct read access to the RX FIFO for this state machine. Each read pops one word from the FIFO.
Table 366. RXF0,
RXF1, RXF2, RXF3
Registers
Bits Name Description Type Reset
31:0 NONAME RF -
IRQ Register
Description
Interrupt request register. Write 1 to clear
RP2040 Datasheet
3.8. List of Registers 372