Table 93. Analog Watchdog 1 Comparison; Table 94. Analog Watchdog 2 And 3 Comparison - ST STM32L4x6 Reference Manual

RM0351
These thresholds are programmed in bits HT1[11:0] and LT1[11:0] of the ADCx_TR1
register for the analog watchdog 1. When converting data with a resolution of less than 12
bits (according to bits RES[1:0]), the LSB of the programmed thresholds must be kept
cleared because the internal comparison is always performed on the full 12-bit raw
converted data (left aligned).
Table 93
analog watchdog 1.
Resolution
(bit
RES[1:0])
00: 12-bit
01: 10-bit
10: 8-bit
11: 6-bit
1. The watchdog comparison is performed on the raw converted data before any alignment calculation and
before applying any offsets (the data which is compared is not signed).
Description of analog watchdog 2 and 3
The second and third analog watchdogs are more flexible and can guard several selected
channels by programming the corresponding bits in AWDCHx[19:0] (x=2,3).
The corresponding watchdog is enabled when any bit of AWDCHx[19:0] (x=2,3) is set.
They are limited to a resolution of 8 bits and only the 8 MSBs of the thresholds can be
programmed into HTx[7:0] and LTx[7:0].
performed for all the possible resolutions.
Analog watchdog comparison between:
Resolution
Raw converted data,
(bits RES[1:0])
left aligned
00: 12-bit
01: 10-bit
10: 8-bit
11: 6-bit DATA[11:6],00
1. The watchdog comparison is performed on the raw converted data before any alignment calculation and before
applying any offsets (the data which is compared is not signed).
describes how the comparison is performed for all the possible resolutions for

Table 93. Analog watchdog 1 comparison

Analog watchdog comparison
between:
Raw converted data,
(1)
left aligned
DATA[11:0]
DATA[11:2],00
DATA[11:4],0000
DATA[11:6],0000
00

Table 94. Analog watchdog 2 and 3 comparison

(1)
DATA[11:4] LTx[7:0] and HTx[7:0] DATA[3:0] are not relevant for the comparison
DATA[11:4] LTx[7:0] and HTx[7:0] DATA[3:2] are not relevant for the comparison
DATA[11:4] LTx[7:0] and HTx[7:0] -
LTx[7:0] and HTx[7:0] User must configure LTx[1:0] and HTx[1:0] to 00
DocID024597 Rev 3
Thresholds
LT1[11:0] and
-
HT1[11:0]
LT1[11:0] and User must configure LT1[1:0] and HT1[1:0] to
HT1[11:0] 00
LT1[11:0] and User must configure LT1[3:0] and HT1[3:0] to
HT1[11:0] 0000
LT1[11:0] and User must configure LT1[5:0] and HT1[5:0] to
HT1[11:0] 000000
Table 94 describes how the comparison is
Thresholds
Analog-to-digital converters (ADC)
Comments
Comments
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