HP LaserJet Enterprise M552 - Firmware; Nonvolatile random access memory (NVRAM); Random access memory (RAM); HP Memory Enhancement technology (MEt)

Firmware
The embedded MultiMedia Card (eMMC) on the formatter stores the rmware for the M552 and M553 models.
The hard disk drive (HDD) on the formatter stores the rmware for the M577 models. A remote rmware
upgrade process is used to overwrite and upgrade the rmware.
Nonvolatile random access memory (NVRAM)
The printer uses NVRAM to store printer and user conguration settings. The contents of NVRAM are retained
when the printer is turned o or disconnected.
Random access memory (RAM)
The RAM on the formatter serves as a temporary storage area for printing and system operation.
HP Memory Enhancement technology (MEt)
MEt eectively doubles the amount of standard memory through a variety of font- and data-compression
methods.
NOTE: MEt is available only in when printing in printer command language (PCL) mode. It is not functional
when printing in PostScript (PS) mode.
10 Chapter 1 Theory of operation ENWW