Dfsdm Functional Description; Dfsdm Block Diagram; Figure 67. Single Dfsdm Block Diagram - ST STM32F412 Reference Manual

RM0402
14.4

DFSDM functional description

14.4.1

DFSDM block diagram

Parallel input data
register 0
EXTRG[1:0]
CKOUT
DATIN0
CKIN0
DATIN3
CKIN3
Control unit
Configuration
registers
DMA, interrupt, break
control, clock control

Figure 67. Single DFSDM block diagram

APB bus
Sample 1 Sample 0
Sample 1 Sample 0
Parallel input data
register 3
Clock Mode
control control
Serial transceiver 0
Clock Mode
control control
Serial transceiver 3
Interrupt,
break
1's, 0's counter
threshold
Short circuit
detector 0 1's, 0's counter
threshold
Short circuit
detector 3
Digital filter for sigma delta modulators (DFSDM)
16
16
Data 0
Clock 0
16
Data 1
Clock 1
Data in
16
Clock in
4 watchdog filters
4 watchdog comparators
High threshold
Filter 0 Low threshold
config
Analog watchdog 0
High threshold
Filter 1 Low threshold
config
Analog watchdog 1
Interrupts and events:
1) end of conversion
2) analog watchdog
Extremes
3) short circuit detection
detector 0
4) overrun
RM0402 Rev 6
Filter Oversampling Oversampling
order ratio
x
Sinc filter 0 Integrator unit 0
Filter Oversampling Oversampling
order ratio
x
Sinc filter 1 Integrator unit 1
Right bit-shift
count
Calibration data
correction unit
DFSDM data 0
Interrupt,
break Data output
Interrupt,
break
Maximum value
Maximum value
Minimum value
Minimum value
Extremes
detector 1
ratio
ratio
Right bit-shift
count
Calibration data
correction unit
DFSDM data 1
APB bus
MSv40119V4
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