RM0016 Memory and register map
Doc ID 14587 Rev 8 33/449
3.2 Register description abbreviations
In the register descriptions of each chapter in this reference manual, the following
abbreviations are used:
Table 4. List of abbreviations
Abbreviation Description
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 a meaningless
value.
read/write once (rwo)
Software can only write once to this bit but can read it at any time. Only a
reset can return this bit to its reset value.
read/clear (rc_w1)
Software can read and clear this bit by writing 1. Writing ‘0’ has no effect on
the bit value.
read/clear (rc_w0)
Software can read and clear this bit by writing 0. Writing ‘1’ has no effect on
the bit value.
read/set (rs) Software can read and set this bit. Writing ‘0’ 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.
Reserved (Res.) Reserved bit, must be kept at reset value.
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