Single Wire Protocol Master Interface (SWPMI) RM0351
1512/1830 DocID024597 Rev 5
44.6.4 SWPMI Interrupt Flag Clear register (SWPMI_ICR)
Address offset: 0x10
Reset value: 0x0000 0000
Bit 4 TXUNRF: Transmit underrun error flag
This flag is set by hardware to indicate an underrun during the payload transmission i.e.
SWPMI_TDR has not been written in time by the software or the DMA. It is cleared by
software, writing 1 to the CTXUNRF bit in the SWPMI_ICR register.
0: No underrun error in transmission
1: Underrun error in transmission detected
Bit 3 RXOVRF: Receive overrun error flag
This flag is set by hardware to indicate an overrun during the payload reception, i.e.
SWPMI_RDR has not be read in time by the software or the DMA. It is cleared by software,
writing 1 to CRXOVRF bit in the SWPMI_ICR register.
0: No overrun in reception
1: Overrun in reception detected
Bit 2 RXBERF: Receive CRC error flag
This flag is set by hardware to indicate a CRC error in the received frame. It is set
synchronously with RXBFF flag. It is cleared by software, writing 1 to CRXBERF bit in the
SWPMI_ICR register.
0: No CRC error in reception
1: CRC error in reception detected
Bit 1 TXBEF: Transmit buffer empty flag
This flag is set by hardware to indicate that no more SWPMI_TDR update is required to
complete the current frame transmission. It is cleared by software, writing 1 to CTXBEF bit in
the SWPMI_ICR register.
0: Frame transmission buffer no yet emptied
1: Frame transmission buffer has been emptied
Bit 0 RXBFF: Receive buffer full flag
This flag is set by hardware when the final word for the frame under reception is available in
SWPMI_RDR. It is cleared by software, writing 1 to CRXBFF bit in the SWPMI_ICR register.
0: The last word of the frame under reception has not yet arrived in SWPMI_RDR
1: The last word of the frame under reception has arrived in SWPMI_RDR
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
Res. Res. Res. Res. Res. Res. Res. CSRF CTCF Res. Res.
CTXUN
RF
CRXOV
RF
CRXBE
RF
CTXBE
F
CRXBF
F
rc_w1 rc_w1 rc_w1 rc_w1 rc_w1 rc_w1 rc_w1
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