HP Enterprise CP5525 manual Input/output, Memory, PJL overview, Firmware, Nonvolatile memory

Input/output

The product has three I/O interfaces:

●USB 2.0 port for connecting directly to a computer

●Internal 10/100Base-T network port

●Walk-up USB port

CPU

The formatter incorporates a 800 MHz Vermillion processor.

Memory

The random access memory (RAM) on the formatter printed circuit assembly (PCA) contains the page, I/O buffers, and the font storage area. It stores printing and font information received from the host system, and can also serve to temporarily store a full page of print-image data before the data is sent to the print engine.

NOTE: If the product encounters a problem when managing available memory, a clearable warning message appears on the control-panel display.

Firmware

The firmware is contained in the internal solid state drive (SSD) or hard disk (HD). A remote firmware upgrade process is used to overwrite and upgrade the firmware on the SSD or HD.

Nonvolatile memory

The product uses nonvolatile memory (NVRAM) to store device and user configuration settings. The contents of NVRAM are retained when the product is turned off or disconnected.

PJL overview

The printer job language (PJL) is an integral part of configuration, in addition to the standard printer command language (PCL). With standard cabling, the product can use PJL to perform a variety of functions.

●Two-way communication with the host computer through a network connection or a USB connection. The product can inform the host about the control-panel settings which can be changed from the host.

●Dynamic I/O switching. The product uses this switching to be configured with a host on each I/O. The product can receive data from more than one I/O simultaneously, until the I/O buffer is full. This can occur even when the product is offline.

6 Chapter 1 Theory of operation ENWW