44.4.4 Interrupts and DMA Requests
The following table illustrates the status flags that can generate the LPSPI interrupt and
LPSPI transmit/receive DMA requests.
Table 44-6. LPSPI Interrupts and DMA Requests
Flag
Description
Interrupt
DMA Request
Low Power Wakeup
TDF
Data can be written to
transmit FIFO, as
configured by
TXWATER.
Y
TX
Y
RDF
Data can be read from
the receive FIFO, as
configured by
RXWATER.
Y
RX
Y
WCF
Word complete, last bit
of word has been
sampled.
Y
N
Y
FCF
Frame complete, PCS
has negated .
Y
N
Y
TCF
Transfer complete, PCS
has negated and
transmit/command
FIFO is empty.
Y
N
Y
TEF
Transmit error flag,
indicates transmit/
command FIFO
underrun. This bit
cannot set in master
mode when NOSTALL
is clear.
Y
N
Y
REF
Receive error flag,
indicates receive FIFO
overflow. This bit
cannot set in master
mode when NOSTALL
is clear.
Y
N
Y
DMF
Data match flag,
received data has
matched the configured
data match value.
Y
N
Y
MBF
LPSPI is busy
performing a SPI bus
transfer.
N
N
N
Chapter 44 Low Power Serial Peripheral Interface (LPSPI)
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
NXP Semiconductors
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