Fixed-Point Blockset

Detect Change

Detect a change in a signal's value

Library

Edge Detect

Description

The Detect Change block is a masked block that determines if an input does not equal its previous value where

• The output is true (not 0), when the input signal does not equal its previous value.
• The output is false (equal to 0), when the input signal equals its previous value.

Parameters and Dialog Box

Initial condition

Set the initial condition for the previous input U/z.

Characteristics

Input Port	Any data type supported by the blockset
Output Port	An 8-bit unsigned integer
Direct Feedthrough	Yes
Scalar Expansion	Yes
Vectorized	Yes

See Also

Detect Decrease, Detect Fall Negative, Detect Fall Nonpositive, Detect Increase, Detect Rise Nonnegative, Detect Rise Positive

Derivative

Detect Decrease