STMicroelectronics STM32F407 User Manual

Analog-to-digital converter (ADC) RM0090
430/1731 DocID018909 Rev 11
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Reserved
TSVREFE VBATE
Reserved
ADCPRE
rw rw rw rw
15141312111098 7 654321 0
DMA[1:0] DDS
Res.
DELAY[3:0]
Reserved
MULTI[4:0]
rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:24 Reserved, must be kept at reset value.
Bit 23 TSVREFE: Temperature sensor and V
REFINT
enable
This bit is set and cleared by software to enable/disable the temperature sensor and the
V
REFINT
channel.
0: Temperature sensor and V
REFINT
channel disabled
1: Temperature sensor and V
REFINT
channel enabled
Note: On STM32F42x and STM32F43x devices, VBATE must be disabled when TSVREFE is
set. If both bits are set, only the VBAT conversion is performed.
Bit 22 VBATE: V
BAT
enable
This bit is set and cleared by software to enable/disable the V
BAT
channel.
0: V
BAT
channel disabled
1: V
BAT
channel enabled
Bits 21:18 Reserved, must be kept at reset value.
Bits 17:16 ADCPRE: ADC prescaler
Set and cleared by software to select the frequency of the clock to the ADC. The clock is
common for all the ADCs.
Note: 00: PCLK2 divided by 2
01: PCLK2 divided by 4
10: PCLK2 divided by 6
11: PCLK2 divided by 8
Bits 15:14 DMA: Direct memory access mode for multi ADC mode
This bit-field is set and cleared by software. Refer to the DMA controller section for more
details.
00: DMA mode disabled
01: DMA mode 1 enabled (2 / 3 half-words one by one - 1 then 2 then 3)
10: DMA mode 2 enabled (2 / 3 half-words by pairs - 2&1 then 1&3 then 3&2)
11: DMA mode 3 enabled (2 / 3 bytes by pairs - 2&1 then 1&3 then 3&2)
Bit 13 DDS: DMA disable selection (for multi-ADC mode)
This bit is set and cleared by software.
0: No new DMA request is issued after the last transfer (as configured in the DMA
controller). DMA bits are not cleared by hardware, however they must have been cleared
and set to the wanted mode by software before new DMA requests can be generated.
1: DMA requests are issued as long as data are converted and DMA = 01, 10 or 11.
Bit 12 Reserved, must be kept at reset value.

STMicroelectronics STM32F407 Specifications

General

Brand	STMicroelectronics
Model	STM32F407
Category	Controller
Language	English