Decimation Filter
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor
1187
26.4.2.3
Decimation Filter Module Extended Configuration Register
(DECFILTER_MXCR)
29
OVF
Filter Overflow Flag. The OVF bit indicates that an overflow occurred in the filtered sample result.
This flag generates an Interrupt Request if enabled by the ERREN bit in the Configuration
Register. This Flag is cleared by the OVFC Status bit or by a soft reset of the decimation filter.
1 Overflow occurred
0 No overflow
30
OVR
Output Interface Buffer Overrun. The OVR bit indicates that a decimated sample was overwritten
by a new sample in the Interface Output Buffer Register. This flag generates an Interrupt Request
if enabled by the ERREN bit in the Configuration Register. This Flag is cleared by the OVRC
Status bit or by a soft reset of the decimation filter.
1 Filter Output Overrun occurred
0 No Output Overrun
31
IVR
Input Interface Buffer Overrun. The IVR bit indicates that a received sample in the Filter Interface
Input Register was overwritten by a new sample. This was probably caused by a violation of the
Decimation Filter maximum throughput. This flag generates an Interrupt Request if enabled by
the ERREN bit in the Configuration Register. This Flag is cleared by the IVRC Status bit or by a
soft reset of the decimation filter.
1 Input Buffer Overrun occurred
0 Input Buffer Overrun did not occur
Note:
IVR does not set due to input register writes when input is disabled (DECFILTER_MCR bit
IDIS = 1).
Address: DECFILTE 0x008
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
SDMAE
SSIG
SSA
T
SCSA
T
0
0
0
0
0
0
0
0
0
0
0
0
W
SRQ
SZRO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
SISEL
0
SZROSEL
0
0
SHLTSEL
0
SRQSEL
0
0
SENSEL
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 26-4. Decimation Filter Extended Configuration Register (DECFILTER_MXCR)
Table 26-11. DECFILTER_MSR Register Field Descriptions (continued)
Field
Description
Summary of Contents for MPC5644A
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