Datasheet

Description
Status register
Table 603. SR Register
Bits Name Description Type Reset
31:7 Reserved. - - -
6 DCOL Data collision error RO 0x0
5 TXE Transmission error RO 0x0
4 RFF Receive FIFO full RO 0x0
3 RFNE Receive FIFO not empty RO 0x0
2 TFE Transmit FIFO empty RO 0x0
1 TFNF Transmit FIFO not full RO 0x0
0 BUSY SSI busy flag RO 0x0
SSI: IMR Register
Offset: 0x2c
Description
Interrupt mask
Table 604. IMR
Register
Bits Name Description Type Reset
31:6 Reserved. - - -
5 MSTIM Multi-master contention interrupt mask RW 0x0
4 RXFIM Receive FIFO full interrupt mask RW 0x0
3 RXOIM Receive FIFO overflow interrupt mask RW 0x0
2 RXUIM Receive FIFO underflow interrupt mask RW 0x0
1 TXOIM Transmit FIFO overflow interrupt mask RW 0x0
0 TXEIM Transmit FIFO empty interrupt mask RW 0x0
SSI: ISR Register
Offset: 0x30
Description
Interrupt status
Table 605. ISR
Register
Bits Name Description Type Reset
31:6 Reserved. - - -
5 MSTIS Multi-master contention interrupt status RO 0x0
4 RXFIS Receive FIFO full interrupt status RO 0x0
3 RXOIS Receive FIFO overflow interrupt status RO 0x0
2 RXUIS Receive FIFO underflow interrupt status RO 0x0
1 TXOIS Transmit FIFO overflow interrupt status RO 0x0
0 TXEIS Transmit FIFO empty interrupt status RO 0x0
RP2040 Datasheet
4.10. SSI 623