PXR40RM Datasheet, PDF (1125/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Decimation Filter
28.2.2.2 Decimation Filter Module Status Register (DECFILT_x_MSR)
Address: DECFILT_x_BASE + 0x004
0
1
2
3
4
5
6
7
8
R BSY 0 DEC_COUNTER[3:0] 0
0
0
W
IDFC ODFC
Reset 0
0 0000 0
0
0
Access: User read/write
9
10
11
12
13
14
15
0
0
0
0
0
0
0
IBIC OBIC
DIVRC OVFC OVRC IVRC
0
0
0
0
0
0
0
16
R0
W
Reset 0
17
18 19 20 21
22
23
24
25
26
27
28
29
30
31
0 0 0 0 0 IDF ODF 0 IBIF OBIF 0 DIVR OVF OVR IVR
0 0000 0
0
0
0
0
0
0
0
0
0
Figure 28-3. Decimation Filter Status Register (DECFILT_x_MSR)
Table 28-5. DECFILT_x_MSR Field Descriptions
Field
Description
0
BSY
Decimation Filter Busy indication—The BSY bit indicates that the Decimation Filter is actively processing a new
input data sample. BSY is not asserted when the filter is disabled (FTYPE = 00). The BSY bit is asserted when
the soft reset is executed.
0 Decimation Filter Idle
1 Decimation Filter Busy
1
Reserved
2–5
DEC_
COUNTER
Decimation Counter—The DEC_COUNTER[3:0] field indicates the current value of the DEC_COUNTER
Decimation Counter, which counts the number of input data samples received by the Decimation Filter. When
the value of this counter matches the DEC_RATE[3:0] Configuration Register field, one decimated result is
generated and the DEC_COUNTER counter is re-initialized at zero. This register is cleared by a soft reset or a
flush command.
6
IDFC
Input Data Flag Clear bit—The IDFC bit clears the IDF Flag bit in the Status Register. This bit is self negated,
therefore it is always read as zero.
0 No action
1 Clears IDF
7
ODFC
Output Data Flag Clear bit—The ODFC bit clears the ODF Flag bit in the Status Register. This bit is self negated,
therefore it is always read as zero.
0 No action
1 Clears ODF
8
Reserved
9
Input Buffer Interrupt Request Clear bit—The IBIC bit clears the IBIF Flag bit in the Status Register. This bit is
IBIC self negated, therefore it is always read as zero.
0 No action
1 Clears IBIF
10
OBIC
Output Buffer Interrupt Request Clear bit—The OBIC bit clears the OBIF Flag bit in the Status Register. This bit
is self negated, therefore it is always read as zero.
0 No action
1 Clears OBIF
11
Reserved
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
28-11