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Documentation conventions RM0090

58/1749 RM0090 Rev 18

1.2 Glossary

This section gives a brief definition of acronyms and abbreviations used in this document:

• The CPU core integrates two debug ports:

– JTAG debug port (JTAG-DP) provides a 5-pin standard interface based on the

Joint Test Action Group (JTAG) protocol.

– SWD debug port (SWD-DP) provides a 2-pin (clock and data) interface based on

the Serial Wire Debug (SWD) protocol.

For both the JTAG and SWD protocols, please refer to the Cortex

-M4 with FPU

Technical Reference Manual

• Word: data/instruction of 32-bit length.

• Half word: data/instruction of 16-bit length.

• Byte: data of 8-bit length.

• Double word: data of 64-bit length.

• IAP (in-application programming): IAP is the ability to reprogram the Flash memory of a

microcontroller while the user program is running.

• ICP (in-circuit programming): ICP is the ability to program the Flash memory of a

microcontroller using the JTAG protocol, the SWD protocol or the bootloader while the

device is mounted on the user application board.

• I-Code: this bus connects the Instruction bus of the CPU core to the Flash instruction

interface. Prefetch is performed on this bus.

• D-Code: this bus connects the D-Code bus (literal load and debug access) of the CPU

to the Flash data interface.

• Option bytes: product configuration bits stored in the Flash memory.

• OBL: option byte loader.

• AHB: advanced high-performance bus.

• CPU: refers to the Cortex

-M4 with FPU core.

1.3 Peripheral availability

For peripheral availability and number across all STM32F405xx/07xx and

STM32F415xx/17xx sales types, please refer to the STM32F405xx/07xx and

STM32F415xx/17xx datasheets.

For peripheral availability and number across all STM32F42xxx and STM32F43xxx sales

types, please refer to the STM32F42xxx and STM32F43xxx datasheets.

ST STM32F405 User Manual

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