PXR40RM Datasheet, PDF (1132/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Decimation Filter
Table 28-7. DECFILT_x_MXSR Field Descriptions (continued)
Field
29
SSOVF
30
SCOVF
31
SVR
Description
Integrator Sum Overflow Flag—The SSOVF bit indicates an overflow of the integrator accumulator. This Flag is
cleared by the SSOVFC bit or by a soft reset.
0 No overflow in the integrator accumulator.
1 Integrator accumulator overflown.
Note: The SSOVF bit samples the integrator accumulator overflow condition when and only when either
registers DECFILT__FINTVAL or DECFILT__CINTCNT are updated. Therefore, only one of the register
pairs (DECFILT_x_FINTVAL/DECFILT_x_FINTCNT and DECFILT_x_CINTVAL/DECFILT_x_CINTCNT)
must be used by the application, in order to avoid races.
Integrator Count Overflow Flag—The SCOVF bit flag indicates an overflow of the internal integrated sample
counter. This Flag is cleared by the SCOVFC bit or by a soft reset.
0 No overflow in the integrator sample counter.
1 Integrator sample counter overflown.
Note: The SCOVF bit samples the integrator accumulator overflow condition when and only when either
registers DECFILT_x_FINTVAL or DECFILT_x_CINTCNT are updated. Therefore, only one of the register
pairs (DECFILT_x_FINTVAL/DECFILT_x_FINTCNT and DECFILT_x_CINTVAL/DECFILT_x_CINTCNT)
must be used by the application, in order to avoid races.
Integrator Data Overrun—The SVR bit indicates that an integration value and count in the registers
DECFILT_x_FINTVAL and DECFILT_x_FINTCNT was overwritten by a new integrator output request and was
not read by the CPU or DMA. This flag generates an Interrupt Request if enabled by the ERREN bit in the
Configuration Register. This Flag is cleared by the SVRC bit or by a soft reset.
0 Integrator Data Overrun did not occur.
1 Integrator Data Overrun occurred.
28-18
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor