chirp. n. A short, high-pitched sound, such as the one a small bird or insect makes. intr.v. chirped, chirpÂ·ing, chirps. To make a short, high-pitched sound.
Flash memory is a type of nonvolatile memory that erases data in units called blocks. A block stored on a flash memory chip must be erased before data can be written, or programmed, to the microchip. Flash memory retains data for an extended period of time whether a flash-equipped device is powered on or off.
It is an EPROM, except in the 2691, where the startup configuration is stored in the same Flash device where the boot code is loaded. Flash is used for permanent storage of a full Cisco IOS software image in compressed form. On the 2691, the Flash is also used to store the boot image and the NVRAM data.