ST STM32F412 User Manual

Analog-to-digital converter (ADC) RM0402
322/1163 RM0402 Rev 6
Figure 61. Analog watchdog’s guarded area
13.3.8 Scan mode
This mode is used to scan a group of analog channels.
The Scan mode is selected by setting the SCAN bit in the ADC_CR1 register. Once this bit
has been set, the ADC scans all the channels selected in the ADC_SQRx registers (for
regular channels) or in the ADC_JSQR register (for injected channels). A single conversion
is performed for each channel of the group. After each end of conversion, the next channel
in the group is converted automatically. If the CONT bit is set, regular channel conversion
does not stop at the last selected channel in the group but continues again from the first
selected channel.
If the DMA bit is set, the direct memory access (DMA) controller is used to transfer the data
converted from the regular group of channels (stored in the ADC_DR register) to SRAM
after each regular channel conversion.
The EOC bit is set in the ADC_SR register:
• At the end of each regular group sequence if the EOCS bit is cleared to 0
• At the end of each regular channel conversion if the EOCS bit is set to 1
The data converted from an injected channel are always stored into the ADC_JDRx
registers.
Table 75. Analog watchdog channel selection
Channels guarded by the analog
watchdog
ADC_CR1 register control bits (x = don’t care)
AWDSGL bit AWDEN bit JAWDEN bit
None x 0 0
All injected channels 0 0 1
All regular channels 0 1 0
All regular and injected channels 0 1 1
Single
(1)
injected channel
1. Selected by the AWDCH[4:0] bits
101
Single
(1)
regular channel 1 1 0
Single
(1)
regular or injected channel 1 1 1
ai16048
Analog voltage
Higher threshold
Lower threshold
Guarded area
HTR
LTR

ST STM32F412 Specifications

General

Brand	ST
Model	STM32F412
Category	Microcontrollers
Language	English