NXP Semiconductors K22F series, Reference Manual, Page: 1146 / 1407

SPIx_RSER field descriptions (continued)
Field Description
0 TFUF interrupt requests are disabled.
1 TFUF interrupt requests are enabled.
26
Reserved
Always write the reset value to this field.
This field is reserved.
25
TFFF_RE
Transmit FIFO Fill Request Enable
Enables the TFFF flag in the SR to generate a request. The TFFF_DIRS bit selects between generating
an interrupt request or a DMA request.
0 TFFF interrupts or DMA requests are disabled.
1 TFFF interrupts or DMA requests are enabled.
24
TFFF_DIRS
Transmit FIFO Fill DMA or Interrupt Request Select
Selects between generating a DMA request or an interrupt request. When SR[TFFF] and
RSER[TFFF_RE] are set, this field selects between generating an interrupt request or a DMA request.
0 TFFF flag generates interrupt requests.
1 TFFF flag generates DMA requests.
23
Reserved
Always write the reset value to this field.
This field is reserved.
22
Reserved
Always write the reset value to this field.
This field is reserved.
21
Reserved
Always write the reset value to this field.
This field is reserved.
20
Reserved
Always write the reset value to this field.
This field is reserved.
19
RFOF_RE
Receive FIFO Overflow Request Enable
Enables the RFOF flag in the SR to generate an interrupt request.
0 RFOF interrupt requests are disabled.
1 RFOF interrupt requests are enabled.
18
Reserved
Always write the reset value to this field.
This field is reserved.
17
RFDF_RE
Receive FIFO Drain Request Enable
Enables the RFDF flag in the SR to generate a request. The RFDF_DIRS bit selects between generating
an interrupt request or a DMA request.
0 RFDF interrupt or DMA requests are disabled.
1 RFDF interrupt or DMA requests are enabled.
16
RFDF_DIRS
Receive FIFO Drain DMA or Interrupt Request Select
Table continues on the next page...
Memory Map/Register Definition
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
1146 NXP Semiconductors