Information
SPIx_RSER field descriptions (continued)
Field Description
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
This read-only field is reserved and always has the value zero.
22
Reserved
This read-only field is reserved and always has the value zero.
21
Reserved
This read-only field is reserved and always has the value zero.
20
Reserved
This read-only field is reserved and always has the value zero.
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
This read-only field is reserved and always has the value zero.
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
Selects between generating a DMA request or an interrupt request. When the RFDF flag bit in the SR is
set, and the RFDF_RE bit in the RSER is set, the RFDF_DIRS bit selects between generating an interrupt
request or a DMA request.
0 Interrupt request.
1 DMA request.
15
Reserved
This read-only field is reserved and always has the value zero.
Table continues on the next page...
Memory Map/Register Definition
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
978 Freescale Semiconductor, Inc.