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RM0351 Documentation conventions
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1 Documentation conventions
1.1 List of abbreviations for registers
The following abbreviations are used in register descriptions:
1.2 Glossary
This section gives a brief definition of acronyms and abbreviations used in this document:
• Word: data of 32-bit length.
• Half-word: data of 16-bit length.
• Byte: data of 8-bit length.
• IAP (in-application programming): IAP is the ability to re-program 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.
• Option bytes: product configuration bits stored in the Flash memory.
• OBL: option byte loader.
• AHB: advanced high-performance bus.
• APB: advanced peripheral bus.
1.3 Peripheral availability
For peripheral availability and number across all sales types, please refer to the particular
device datasheet.
read/write (rw) Software can read and write to these bits.
read-only (r) Software can only read these bits.
write-only (w) Software can only write to this bit. Reading the bit returns the reset value.
read/clear
(rc_w1)
Software can read as well as clear this bit by writing 1. Writing ‘0’ has no
effect on the bit value.
read/clear
(rc_w0)
Software can read as well as clear this bit by writing 0. Writing ‘1’ has no
effect on the bit value.
read/clear by
read (rc_r)
Software can read this bit. Reading this bit automatically clears it to ‘0’.
Writing ‘0’ has no effect on the bit value.
read/set (rs) Software can read as well as set this bit. Writing ‘0’ has no effect on the bit
value.
Reserved (Res.) Reserved bit, must be kept at reset value.
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