Definitions of assert and de-assert in computer terms

Source: Internet
Author: User

Asserting (asserting, asserted), de-assert (deassert, deasserting, deasserted) and other words are often seen in Datasheet, as shown in the following sentence:

Assertion of ldt_rst # causes the CPU to transition into a low power state and to de-assert memclkea/B and assert memrest_l.

So what does this word mean? Let's explain the meaning of the two words below:

Assert: changes the signal to active (which can be understood as valid). The effective level can be high (that is, high effective) depending on the system requirements) it can also be low-level (that is, low-effective ).
De-assert: indicates that the signal is not active, which can be high or low.

Explanation:

Assert: Set a signal to its "active" State;

De-assert: Set a signal to its "inactive" state.
If a signal is active-low, "asserting" that signal means setting it low and deasserting It means setting it high.

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