Table 364. Osdr Field Descriptions - STMicroelectronics SPC572L series Reference Manual

Sigma-Delta Analog-to-Digital Converter (SDADC) Digital Interface
Field
0–23 Reserved
Output Settling Delay
This field defines the delay to qualify the conversion data stored in CDR. Whenever the
SDADC block is reset in order to start the conversion from a fresh state, an internal timer is
loaded with this start value. The counter counts down with output clock f
24–31
and then it generates a flag which qualifies the converted data. The output clock f
OSD[7:0]
f
s
selected, the output clock is fixed to f
Note: Refer to the t
35.6.2.7 FIFO Control Register (FCR)
The FIFO Control Register (FCR) provides the ability to turn on and off the FIFO
functionality, and to select the size of FIFO depth. This register also provides the ability to
set the programmable threshold for notification of dataword removal from the FIFO. This
register may be read at any time, but should only be written when SDADC is disabled
(MCR[EN] = 0).
Offset 0x0018
0 1
R 0 0
W
Reset 0 0
16 17
R 0 0
W
Reset 0 0
Field
0–14 Reserved
FIFO Flush Reset
This is functional soft reset to flush the current FIFO content and initialize the internal FIFO
15 pointers. This is W1S(write one shot) bit which can be written as '1' but always read as '0'.
Use this option only after disabling the ADC i.e. MCR[EN]='0'.
FRST
0 : No effect.
1 : Generate a single cycle reset event to flush the FIFO.
16–19 Reserved
746/2058

Table 364. OSDR field descriptions

/ (2×OSR), where f is the input sampling clock frequency. When external modulator is
s
settling
allowed output settling delay values.
2 3 4 5
0 0 0 0
0 0 0 0
18 19 20 21
0 0
FTHLD
0 0 0 0
Figure 321. FIFO Control Register (FCR)
Table 365. FCR field descriptions
DocID027809 Rev 4
Description
/ 256.
s
and t parameters in the device datasheet for the minimum
LATENCY
6 7 8 9
0 0 0 0
0 0 0 0
22 23 24 25
0 0
0 0 0 0
Description
until it reaches zero,
d
Access: User Read/Write
10 11 12 13
0 0 0 0
0 0 0 0
26 27 28 29
0 0 FSIZE
FOW
EN
0 0 0 0
RM0400
is equal to
d
14 15
0 0
FRS
T
0 0
30 31
FE
0 0