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STM32

F446

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This is information on a product in full production.

September 2016 DocID027107 Rev 6 1/202

STM32F446xC/E

ARM

Cortex

-M4 32b MCU+FPU, 225DMIPS, up to 512kB Flash/128+4KB RAM,

USB OTG HS/FS, 17 TIMs, 3 ADCs, 20 comm. interfaces

Datasheet - production data

Features

• Core: ARM

32-bit Cortex

-M4 CPU with FPU,

Adaptive real-time accelerator (ART

Accelerator™) allowing 0-wait state execution

from Fl ash memory, frequency up to 180 MHz,

MPU, 225 DMIPS/1.25 DMIPS/MHz

(Dhrystone 2.1), and DSP instructions

• Memories

– 512 kB of Flash memory

– 128 KB of SRAM

– Flexible external memory controller with up

to 16-bit data bus:

SRAM,PSRAM,SDRAM/LPSDR SDRAM,

Flash NOR/NAND memories

– Dual mode Quad SPI interface

• LCD parallel interface, 8080/6800 modes

• Clock, reset and supply management

– 1.7 V to 3.6 V application supply and I/Os

– POR, PDR, PVD and BOR

– 4-to-26 MHz crystal oscillator

– Internal 16 MHz factory-trimmed RC (1%

accuracy)

– 32 kHz oscillator for RTC with calibration

– Internal 32 kHz RC with calibration

• Low power

– Sleep, Stop and Standby modes

–V

BAT

supply for RTC, 20×32 bit backup

registers + optional 4 KB backup SRAM

• 3×12-bit, 2.4 MSPS ADC: up to 24 channels

and 7.2 MSPS in triple interleaved mode

• 2×12-bit D/A converters

• General-purpose DMA: 16-stream DMA

controller with FIFOs and burst support

• Up to 17 timers: 2x watchdog, 1x SysTick timer

and up to twelve 16-bit and two 32-bit timers up

to 180 MHz, each with up to 4 IC/OC/PWM or

pulse counter

• Debug mode

– SWD & JTAG interfaces

–Cortex

-M4 Trace Macrocell™

• Up to 114 I/O ports with interrupt capability

– Up to 111 fast I/Os up to 90 MHz

– Up to 112 5 V-tolerant I/Os

• Up to 20 communication interfaces

– SPDIF-Rx

– Up to 4 × I

C interfaces (SMBus/PMBus)

– Up to 4 USARTs/2 UARTs (11.25 Mbit/s,

ISO7816 interface, LIN, IrDA, modem

control)

– Up to 4 SPIs (45 Mbits/s), 3 with muxed I

for audio class accuracy via internal audio

PLL or external clock

– 2 x SAI (serial audio interface)

– 2 × CAN (2.0B Active)

– SDIO interface

– Consumer electronics control (CEC) I/F

• Advanced connectivity

– USB 2.0 full-speed device/host/OTG

controller with on-chip PHY

– USB 2.0 high-speed/full-speed

device/host/OTG controller with dedicated

DMA, on-chip full-speed PHY and ULPI

– Dedicated USB power rail enabling on-chip

PHYs operation throughout the entire MCU

power supply range

• 8- to 14-bit parallel camera interface up to

54 Mbytes/s

• CRC calculation unit

• RTC: subsecond accuracy, hardware calendar

• 96-bit unique ID

Table 1. Device summary

Reference Part number

STM32F446xC/E

STM32F446MC, STM32F446ME,

STM32F446RC, STM32F446RE,

STM32F446VC, STM32F446VE,

STM32F446ZC, STM32F446ZE.

LQFP64 (10 × 10mm)

LQFP100 (14 × 14mm)

LQFP144 (20 x 20 mm)

UFBGA144 (7 x 7 mm)

&"'!

UFBGA144 (10 x 10 mm)

WLCSP 81

www.st.com

Contents STM32F446xC/E

2/202 DocID027107 Rev 6

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.1 Compatibility with STM32F4 family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3 Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.1 ARM

Cortex

-M4 with FPU and embedded Flash and SRAM . . . . . . . 17

3.2 Adaptive real-time memory accelerator (ART Accelerator™) . . . . . . . . . 17

3.3 Memory protection unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.4 Embedded Flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.5 CRC (cyclic redundancy check) calculation unit . . . . . . . . . . . . . . . . . . . 18

3.6 Embedded SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.7 Multi-AHB bus matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.8 DMA controller (DMA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.9 Flexible memory controller (FMC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.10 Quad SPI memory interface (QUADSPI) . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.11 Nested vectored interrupt controller (NVIC) . . . . . . . . . . . . . . . . . . . . . . . 21

3.12 External interrupt/event controller (EXTI) . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.13 Clocks and startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.14 Boot modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.15 Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.16 Power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.16.1 Internal reset ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.16.2 Internal reset OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.17 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.17.1 Regulator ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.17.2 Regulator OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.17.3 Regulator ON/OFF and internal reset ON/OFF availability . . . . . . . . . . 27

3.18 Real-time clock (RTC), backup SRAM and backup registers . . . . . . . . . . 28

3.19 Low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

3.20 V

BAT

operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

3.21 Timers and watchdogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

DocID027107 Rev 6 3/202

STM32F446xC/E Contents

3.21.1 Advanced-control timers (TIM1, TIM8) . . . . . . . . . . . . . . . . . . . . . . . . . 32

3.21.2 General-purpose timers (TIMx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3.21.3 Basic timers TIM6 and TIM7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3.21.4 Independent watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3.21.5 Window watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3.21.6 SysTick timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3.22 Inter-integrated circuit interface (I

C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3.23 Universal synchronous/asynchronous receiver transmitters (USART) . . 34

3.24 Serial peripheral interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

3.25 HDMI (high-definition multimedia interface) consumer

electronics control (CEC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.26 Inter-integrated sound (I

S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.27 SPDIF-RX Receiver Interface (SPDIFRX) . . . . . . . . . . . . . . . . . . . . . . . . 35

3.28 Serial Audio interface (SAI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3.29 Audio PLL (PLLI2S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3.30 Serial Audio Interface PLL(PLLSAI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3.31 Secure digital input/output interface (SDIO) . . . . . . . . . . . . . . . . . . . . . . . 36

3.32 Controller area network (bxCAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.33 Universal serial bus on-the-go full-speed (OTG_FS) . . . . . . . . . . . . . . . . 37

3.34 Universal serial bus on-the-go high-speed (OTG_HS) . . . . . . . . . . . . . . . 37

3.35 Digital camera interface (DCMI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.36 General-purpose input/outputs (GPIOs) . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.37 Analog-to-digital converters (ADCs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.38 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.39 Digital-to-analog converter (DAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.40 Serial wire JTAG debug port (SWJ-DP) . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.41 Embedded Trace Macrocell™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4 Pinout and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5 Memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

6.1 Parameter conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

6.1.1 Minimum and maximum values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Contents STM32F446xC/E

4/202 DocID027107 Rev 6

6.1.2 Typical values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

6.1.3 Typical curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

6.1.4 Loading capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

6.1.5 Pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

6.1.6 Power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6.1.7 Current consumption measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

6.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

6.3 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.3.1 General operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.3.2 VCAP_1/VCAP_2 external capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.3.3 Operating conditions at power-up / power-down (regulator ON) . . . . . . 79

6.3.4 Operating conditions at power-up / power-down (regulator OFF) . . . . . 79

6.3.5 Reset and power control block characteristics . . . . . . . . . . . . . . . . . . . 80

6.3.6 Over-drive switching characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

6.3.7 Supply current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

6.3.8 Wakeup time from low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . 101

6.3.9 External clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 102

6.3.10 Internal clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 107

6.3.11 PLL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

6.3.12 PLL spread spectrum clock generation (SSCG) characteristics . . . . . 110

6.3.13 Memory characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

6.3.14 EMC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

6.3.15 Absolute maximum ratings (electrical sensitivity) . . . . . . . . . . . . . . . . 116

6.3.16 I/O current injection characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

6.3.17 I/O port characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

6.3.18 NRST pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

6.3.19 TIM timer characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

6.3.20 Communications interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

6.3.21 12-bit ADC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

6.3.22 Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

6.3.23 V

BAT

monitoring characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

6.3.24 Reference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

6.3.25 DAC electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

6.3.26 FMC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

6.3.27 Camera interface (DCMI) timing specifications . . . . . . . . . . . . . . . . . . 172

6.3.28 SD/SDIO MMC card host interface (SDIO) characteristics . . . . . . . . . 173

6.3.29 RTC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

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