LM3S301 Luminary Micro, Inc, LM3S301 Datasheet - Page 18

• Manufacturer Part Number: LM3S301
• Description: Lm3s301 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

About This Document
Table 0-1. Documentation Conventions
18
Register N
reserved
yy:xx
Register Bit/Field Types
RO
R/W
R/W1C
W1C
WO
Register Bit/Field Reset Value
0
1
–
Pin/Signal Notation
[ ]
pin
signal
Notation
Registers are numbered consecutively throughout the document to
aid in referencing them. The register number has no meaning to
software.
Register bits marked reserved are reserved for future use. Reserved
bits return an indeterminate value, and should never be changed.
Only write a reserved bit with its current value.
The range of register bits inclusive from xx to yy. For example, 31:15
means bits 15 through 31 in that register.
This value in the register bit diagram indicates whether software
running on the controller can change the value of the bit field.
Software can read or write this field.
Software can read or write this field. A write of a 0 to a W1C bit does
not affect the bit value in the register. A write of a 1 clears the value
of the bit in the register; the remaining bits remain unchanged.
This register type is primarily used for clearing interrupt status bits
where the read operation provides the interrupt status and the write
of the read value clears only the interrupts being reported at the time
the register was read.
Software can write this field. A write of a 0 to a W1C bit does not
affect the bit value in the register. A write of a 1 clears the value of
the bit in the register; the remaining bits remain unchanged. A read
of the register returns no meaningful data.
This register is typically used to clear the corresponding bit in an
interrupt register.
Only a write by software is valid; a read of the register returns no
meaningful data.
This value in the register bit diagram shows the bit/field value after
any reset, unless noted.
Bit cleared to 0 on chip reset.
Bit set to 1 on chip reset.
Nondeterministic.
Pin alternate function; a pin defaults to the signal without the
brackets.
Refers to the physical connection on the package.
Refers to the electrical signal encoding of a pin.
Software can read this field. Always write the chip reset value.
Preliminary
Meaning
July 5, 2006