Decimation Filter
MPC5644A Microcontroller Reference Manual, Rev. 6
1186
Freescale Semiconductor
15
IVRC
IVR Clear bit. The IVRC bit clears the IVR Filter Input Overrun indication bit in the Status
Register. This bit is self negated, therefore it is always read as zero.
1 Clears IVR
0 No action
16–21
Reserved, should be cleared.
22
IDF
Input Data Flag. The IDF bit flag indicates when new data is available at the DECFILTER_IB
register or at the DECFILTER_IOB register. This flag generates an Interrupt Request if enabled
by the IDEN bit in the Configuration Register. This Flag is cleared by the IDFC Status bit or by a
soft reset of the decimation filter.
1 New Sample received
0 Sample not received
Note:
OBS: This flag is not used for read / write requests. It is used only to announce the input
data event. For read / write request flag, refer to IBIF.
23
ODF
Output Data Flag. The ODF bit flag indicates when a new decimated sample is available at the
DECFILTER_OB register or at the DECFILTER_IOB register. This flag generates an Interrupt
Request if enabled by the ODEN bit in the Configuration Register. This Flag is cleared by the
ODFC Status bit or by a soft reset of the decimation filter.
1 New Decimated Output Sample available
0 No new Decimated Output Sample available
Note:
OBS: This flag is not used for read requests. It is used only to announce the output data
event. For read request flag, refer to OBIF.
24
Reserved, should be cleared.
25
IBIF
Input Buffer Interrupt Request Flag. The IBIF bit flag indicates that the input buffer
DECFILTER_IB is available to be filled with new data, when Enhanced Debug Monitor is off. In
Enhanced Debug Monitor, it indicates the input buffer DECFILTER_IB was filled with a new
sample and is ready to be read. IBIF assertion also asserts the interrupt signal when enabled by
the IBIE bit in the Configuration Register when DMA is not selected (DSEL = 0) and the input
buffer requires access from the device slave-bus (ISEL!= EDME). This Flag is cleared by the
IBIC Status bit or by a soft reset of the decimation filter.
1 New Sample is requested (ISEL = 1, EDME = 0) or new sample is available in Enhanced
Debug Monitor (ISEL = 0, EDME = 1).
0 No action
26
OBIF
Output Buffer Interrupt Request Flag. The OBIF bit flag indicates that either a new decimated
sample is available at the DECFILTER_OB register. This flag generates an Interrupt Request if
enabled by the OBIE bit in the Configuration Register and with ISEL!=MIXM and DSEL = 0. This
Flag is cleared by the OBIC Status bit or by a soft reset of the decimation filter.
1 New Decimated Output available
0 No new Decimated Output available
27
Reserved, should be cleared.
28
DIVR
Enhanced Debug Monitor Input Data Read Overrun. The DIVR bit indicates that a received
sample in the Filter Interface Input Register was overwritten by a new sample and was not read
by the Core. This flag generates an Interrupt Request if enabled by the ERREN bit in the
Configuration Register. This Flag is cleared by the DIVRC Status bit or by a soft reset of the
decimation filter.
1 Enhanced Debug Monitor Input Data Read Overrun occurred
0 Input Data Read Overrun did not occur in Enhanced Debug monitor
Table 26-11. DECFILTER_MSR Register Field Descriptions (continued)
Field
Description
Summary of Contents for MPC5644A
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