ST STM32F4 Series User Manual

The STM32 Cortex-M4 instruction set PM0214
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UDIV {Rd,} Rn, Rm Unsigned divide — 3.6.3 on page 112
UMAAL RdLo, RdHi, Rn, Rm
Unsigned multiply accumulate
accumulate long (32 x 32 + 32
+32), 64-bit result
— 3.6.2 on page 111
UMLAL RdLo, RdHi, Rn, Rm
Unsigned multiply with
accumulate (32 x 32 + 64), 64-
bit result
— 3.6.2 on page 111
UMULL RdLo, RdHi, Rn, Rm
Unsigned multiply (32 x 32),
64-bit result
— 3.6.2 on page 111
UQADD16 {Rd,} Rn, Rm Unsigned saturating add 16 — 3.7.7 on page 132
UQADD8 {Rd,} Rn, Rm Unsigned saturating add 8 — 3.7.7 on page 132
UQASX {Rd,} Rn, Rm
Unsigned saturating add and
subtract with exchange
— 3.7.6 on page 131
UQSAX {Rd,} Rn, Rm
Unsigned saturating subtract
and add with exchange
— 3.7.6 on page 131
UQSUB16 {Rd,} Rn, Rm
Unsigned saturating subtract
16
— 3.7.7 on page 132
UQSUB8 {Rd,} Rn, Rm Unsigned saturating subtract 8 — 3.7.7 on page 132
USAD8 {Rd,} Rn, Rm
Unsigned sum of absolute
differences
— 3.5.22 on page 106
USADA8 {Rd,} Rn, Rm, Ra
Unsigned sum of absolute
differences and accumulate
— 3.5.23 on page 107
USAT Rd, #n, Rm {,shift #s} Unsigned saturate Q 3.7.1 on page 126
USAT16 Rd, #n, Rm Unsigned saturate 16 Q 3.7.2 on page 127
UASX {Rd,} Rn, Rm
Unsigned add and subtract
with exchange
GE 3.5.17 on page 101
USUB16 {Rd,} Rn, Rm Unsigned subtract 16 GE 3.5.24 on page 108
USUB8 {Rd,} Rn, Rm Unsigned subtract 8 GE 3.5.24 on page 108
UXTAB
{Rd,} Rn, Rm,{,ROR
#}
Rotate, extend 8 bits to 32 and
add
— 3.8.3 on page 137
UXTAB16
{Rd,} Rn, Rm,{,ROR
#}
Rotate, dual extend 8 bits to
16 and add
— 3.8.3 on page 137
UXTAH
{Rd,} Rn, Rm,{,ROR
#}
Rotate, unsigned extend and
add halfword
— 3.8.3 on page 137
UXTB {Rd,} Rm {,ROR #n} Zero extend a byte — 3.8.2 on page 136
UXTB16 {Rd,} Rm {,ROR #n} Unsigned extend byte 16 — 3.8.2 on page 136
UXTH {Rd,} Rm {,ROR #n} Zero extend a halfword — 3.8.2 on page 136
VABS.F32 Sd, Sm Floating-point absolute — 3.10.1 on page 151
VADD.F32 {Sd,} Sn, Sm Floating-point add — 3.10.2 on page 152
Table 21. Cortex-M4 instructions (continued)
Mnemonic Operands Brief description Flags Page

ST STM32F4 Series Specifications

General

Series	STM32F4
Core	ARM Cortex-M4
Clock Speed	Up to 180 MHz
Flash Memory	Up to 2 MB
RAM	Up to 384 KB
Operating Voltage	1.8 V to 3.6 V
DAC	12-bit, up to 2 channels
Timers	Up to 17 timers
Communication Interfaces	USB, CAN, SPI, I2C, USART, Ethernet
Operating Temperature	-40°C to 85°C
Package	LQFP, WLCSP, BGA

Summary

Introduction to the STM32 Cortex-M4 Programming Manual

Cortex-M4 Processor Features and Benefits

Summarizes key advantages: outstanding performance, enhanced debug, efficient core, low power, and security.

Reference Documents for STM32 Cortex-M4

Lists datasheets and reference manuals available from STMicroelectronics website for further details.

About this document

Typographical Conventions Used

Explains conventions for highlighting important notes, cross-references, and code elements.

Abbreviations for Registers

Lists common abbreviations used in register descriptions, such as (rw), (r), and (w).

STM32 Cortex-M4 Processor and Core Peripherals Overview

Introduces the Cortex-M4 processor, its architecture, and integrated core peripherals.

The Cortex-M4 Processor

Cortex-M4 Programmers Model

Describes processor modes, privilege levels, execution states, and stack usage.

Cortex-M4 Memory Model

Explains the memory map, access behavior, and bit-banding features.

Cortex-M4 Exception Model

Covers exception states, types, handlers, priorities, and grouping mechanisms.

The STM32 Cortex-M4 Instruction Set

Instruction Set Summary and Syntax

Lists supported instructions, syntax conventions, and flexible operand usage.

Memory Access Instructions

Details instructions for loading and storing data from memory.

General Data Processing Instructions

Covers arithmetic, logical, shift, and data manipulation instructions.

Multiply and Divide Instructions

Explains signed/unsigned multiply, accumulate, divide, and saturation instructions.

Saturating Instructions

Describes instructions performing saturation arithmetic on signed/unsigned values.

Core Peripherals

Nested Vectored Interrupt Controller (NVIC)

Details the NVIC's interrupt handling, priority levels, and registers.

System Control Block (SCB) Registers

Explains SCB registers for system control, configuration, and exception reporting.

SysTick Timer (STK) Functionality

Describes the SysTick timer for system timing and RTOS tick generation.

Document Revision History