Packages

o

chisel3

RegNext

object RegNext

Utility for constructing one-cycle delayed versions of signals

The width of a RegNext is not set based on the next or init connections for Element types. In the following example, the width of bar will not be set and will be inferred by the FIRRTL compiler.

val foo = Reg(UInt(4.W))         // width is 4
val bar = RegNext(foo)           // width is unset

If you desire an explicit width, do not use RegNext and instead use a register with a specified width:

val foo = Reg(UInt(4.W))         // width is 4
val bar = Reg(chiselTypeOf(foo)) // width is 4
bar := foo

Also note that a RegNext of a Bundle will have it's width set for Aggregate types.

class MyBundle extends Bundle {
  val x = UInt(4.W)
}
val foo = Wire(new MyBundle)     // the width of foo.x is 4
val bar = RegNext(foo)           // the width of bar.x is 4
Source
Reg.scala
Linear Supertypes
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. RegNext
  2. AnyRef
  3. Any
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. Protected

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. def apply[T <: Data](next: T, init: T)(implicit sourceInfo: SourceInfo): T

    Returns a register with an unset width connected to the signal next and with the reset value init.

  5. def apply[T <: Data](next: T)(implicit sourceInfo: SourceInfo): T

    Returns a register with an unset width connected to the signal next and with no reset value.

  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  8. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  9. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  11. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  16. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  18. def toString(): String
    Definition Classes
    AnyRef → Any
  19. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  20. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  21. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from AnyRef

Inherited from Any

Ungrouped