Chip Select

When Chip Select a binary signal to an integrated circuit is referred to in digital technology, which can be used to on or off the function of such a circuit in whole or in part. The Chip Select pin is usually as a single (digital input ) realized, which is connected to a control line.

This is used for example to construct a plurality of memory modules has a larger total amount of memory associated with consecutive addresses. These bus lines are applied in parallel to a plurality of memory blocks and selected with the chip select signal, only a certain block, you want to work with. All remaining blocks on the same bus are inactive at this (very short ) period of time, their bus lines are connected internally to a high impedance.

Frequently, chip select inputs " low active ", that is, the block is not activated by a logic "1", but with logic "0".

• Computer Architecture