AN4228 datasheet(29/90 Pages) STMICROELECTRONICS

29 / 90 page

DocID024110 Rev 5

29/90

AN4228

Peripheral migration

3.10

SAR ADC interface

STM32F37xx ADC interface is identical to STM32F1xx, while a different ADC interface is

used in STM32F30xx devices.

The table below presents the differences between the ADC interface of STM32F1 series

and STM32F30x lines; these differences are the following:



New digital interface



New architecture and new features

Read Protection

Unprotection

Read protection disable

RDP = 0xA55A

Level 0 no protection

RDP = 0xAA

Protection

Read protection enable

RDP != 0xA55A

Level 1 memory protection

RDP != (Level 2 & Level 0)



Level 2: Lvl 1 + Debug

disabled

Write protection

Protection by 4-Kbyte block

Protection by a granularity of 2

pages

User Option bytes

STOP

STANDBY

WDG

RAM_PARITY_CHECK

VDDA_MONITOR

nBOOT1

SDADC12_VDD MONITOR

(available only on

STM32F37x)

Table 15. FLASH differences between STM32F1 and STM32F3 series (continued)

Feature

STM32F1 series

STM32F3 series

Table 16. ADC differences between STM32F1 series and STM32F30x lines

ADC

STM32F1 series STM32F30xxB/C

STM32F302x6/8/

STM32F301x6/8

STM32F303x6/8

STM32F30xxD/E

Instances

ADC1 / ADC2 /

ADC3

ADC1 / ADC2 /

ADC3 / ADC4

ADC1

ADC1 / ADC2

ADC1 / ADC2 /

ADC3 / ADC4

Maximum

sampling

frequency

1 MSPS

5.1 MSPS

Number of

channels

Up to 21

Up to 39

+ 7 internal

Up to 15

+ 3 internal

Up to 21

+ 4 internal

Up to 40

+ 7 internal

Resolution

12 bits

Configurable to

12, 10, 8, and 6

bits

Configurable to

12, 10, 8, and 6

bits

Configurable to

12, 10, 8, and 6

bits

Configurable to

12, 10, 8, and 6

bits

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