Datasheet

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STM32F334x4 STM32F334x6 STM32F334x8 Functional overview
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3 Functional overview
3.1 Arm
®
Cortex
®
-M4 core with FPU with embedded Flash
memory and SRAM
The Arm Cortex-M4 processor with FPU is the latest generation of Arm processors for
embedded systems. It has been developed to provide a low-cost platform that meets the
needs of MCU implementation, with a reduced pin count and low-power consumption, while
delivering outstanding computational performance and an advanced response to interrupts.
The Arm 32-bit Cortex-M4 RISC processor with FPU features exceptional code-efficiency,
delivering the high performance expected from an Arm core, with memory sizes usually
associated with 8- and 16-bit devices.
The processor supports a set of DSP instructions that allows efficient signal processing and
complex algorithm execution.
Its single precision FPU speeds up software development by using metalanguage
development tools, while avoiding saturation.
With its embedded Arm core, the STM32F334x4/6/8 family is compatible with all Arm tools
and software.
Figure 1 shows the general block diagram of the STM32F334x4/6/8 family devices.
3.2 Memories
3.2.1 Embedded Flash memory
All STM32F334x4/6/8 devices feature up to 64 Kbytes of embedded Flash memory
available for storing programs and data. The Flash memory access time is adjusted to the
CPU clock frequency (0 wait state from 0 to 24 MHz, 1 wait state from 24 to 48 MHz and 2
wait states above).
3.2.2 Embedded SRAM
The STM32F334x4/6/8 devices feature up to 12 Kbytes of embedded SRAM with hardware
parity check. The memory can be accessed in read/write at CPU clock speed with 0 wait
states, allowing the CPU to achieve 90 Dhrystone Mips at 72
MHz when running code from
CCM (core coupled memory) RAM.
The SRAM is organized as follows:
• 4 Kbytes of SRAM on instruction and data bus with parity check (core coupled memory
or CCM) and used to execute critical routines or to access data
• 12 Kbytes of SRAM with parity check mapped on the data bus
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