Register Diagram Conventions - Analog Devices ADSP-21261 SHARC Hardware Reference Manual

Register Diagram Conventions

Register Diagram Conventions
Register diagrams use the following conventions:
• The descriptive name of the register appears at the top, followed by
the short form of the name in parentheses.
• If the register is read-only (RO), write-1-to-set (W1S), or
write-1-to-clear (W1C), this information appears under the name.
Read/write is the default and is not noted. Additional descriptive
text may follow.
• If any bits in the register do not follow the overall read/write con-
vention, this is noted in the bit description after the bit name.
• If a bit has a short name, the short name appears first in the bit
description, followed by the long name in parentheses.
• The reset value appears in binary in the individual bits and in hexa-
decimal to the right of the register.
• Bits marked x have an unknown reset value. Consequently, the
reset value of registers that contain such bits is undefined or depen-
dent on pin values at reset.
• Shaded bits are reserved.

To ensure upward compatibility with future implementations,
write back the value that is read for reserved bits in a register,
unless otherwise specified.
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