Functional Description - STMicroelectronics SPC572L series Reference Manual

Decimation Filter
Field
Integration Sum Value
The SUM_VALUE[31:0] field holds an unsigned number representing the sum of filtered
output values, continuously updated as the integration proceeds. The control of the
integration sum is determined by the register DECFILTER_MXCR (see <Cross
Refs>Section 37.3.2.3, "Decimation Filter Module Extended Configuration Register
(DECFILTER_MXCR)").
0-31
Note: If the DEFILTER_MXCR bit SSAT=1, the integration sum is saturated, so that if the
SUM_VALUE[31:0]
Note: A read on this register automatically commands an update of the register
37.3.2.12 Decimation Filter Current Integration Count Value register
(DECFILTER_CINTCNT)
Address: DECFILTER_BASE + 0x0EC
0 1
R
W
Reset 0 0
16 17
R
W
Reset 0 0
Figure 371. Decimation Filter Current Integration Count Value register (DECFILTER_CINTCNT)
Field
Integration Count Value
0-31
The COUNT field holds the count of filtered outputs integrated. The value is updated only
COUNT[31:0] when register DECFILTER_CINTVAL is read, to keep the coherency between the integration
and count values.
37.4

Functional description

37.4.1 Overview
Figure 359
control signals for all other sub-modules.The data interface is sub-divided into two sub-
826/2058
Table 430. DECFILTER_CINTVAL field descriptions
accumulation overflows DECFILTER_CINTVAL holds the value 0xFFFFFFFF for
absolute integration (SSIG=0), or values 0x7FFFFFFF (positive saturation) and
0x80000000 (negative saturation) for signaled integration (SSIG=1). If SSAT=0,
DECFILTER_FINTVAL holds the integration sum modulo 2
fractional part).
DECFILTER_CINTCNT.
2 3 4 5
0 0 0 0
18 19 20 21
0 0 0 0
Table 431. DECFILTER_CINTCNT field descriptions
shows the block diagram of the Decimation Filter. The control logic provides the
DocID027809 Rev 4
Description
6 7 8 9
COUNT[31:16]
0 0 0 0
22 23 24 25
COUNT[15:0]
0 0 0 0
Description
17
(considering the 15-bit
Access: User read only
10 11 12 13
0 0 0 0
26 27 28 29
0 0 0 0
RM0400
14 15
0 0
30 31
0 0