STMicroelectronics STM32F407 User Manual

Analog-to-digital converter (ADC) RM0090
394/1731 DocID018909 Rev 11
The total number of conversions in the injected group must be written in the L[1:0] bits
in the ADC_JSQR register.
If the ADC_SQRx or ADC_JSQR registers are modified during a conversion, the current
conversion is reset and a new start pulse is sent to the ADC to convert the newly chosen
group.
Temperature sensor, V
REFINT
and V
BAT
internal channels
• For the STM32F40x and STM32F41x devices, the temperature sensor is internally
connected to channel ADC1_IN16.
The internal reference voltage VREFINT is connected to ADC1_IN17.
• For the STM32F42x and STM32F43x devices, the temperature sensor is internally
connected to ADC1_IN18 channel which is shared with VBAT. Only one conversion,
temperature sensor or VBAT, must be selected at a time. When the temperature sensor
and VBAT conversion are set simultaneously, only the VBAT conversion is performed.
The internal reference voltage VREFINT is connected to ADC1_IN17.
The V
BAT
channel (connected to channel ADC1_IN18) can also be converted as an injected
or regular channel.
Note: The temperature sensor, V
REFINT
and the V
BAT
channel are available only on the master
ADC1 peripheral.
13.3.4 Single conversion mode
In Single conversion mode the ADC does one conversion. This mode is started with the
CONT bit at 0 by either:
• setting the SWSTART bit in the ADC_CR2 register (for a regular channel only)
• setting the JSWSTART bit (for an injected channel)
• external trigger (for a regular or injected channel)
Once the conversion of the selected channel is complete:
• If a regular channel was converted:
– The converted data are stored into the 16-bit ADC_DR register
– The EOC (end of conversion) flag is set
– An interrupt is generated if the EOCIE bit is set
• If an injected channel was converted:
– The converted data are stored into the 16-bit ADC_JDR1 register
– The JEOC (end of conversion injected) flag is set
– An interrupt is generated if the JEOCIE bit is set
Then the ADC stops.

STMicroelectronics STM32F407 Specifications

General

Brand	STMicroelectronics
Model	STM32F407
Category	Controller
Language	English