Kodak 800 SERIES - Manual (Page 41)

Theory of Operation 2-10
NovaJet 800 Series Service Manual
Memory Circuits
Memory is used to retain large amounts of information. This information
is stored in the device memory in the form of binary bits.
Printer memory consists of Flash EEPROM, SDRAM, and EEPROM.
Maximum installable memory is as follows:
SDRAM = 256 MB
Flash EEPROM = 2 MB
Serial EEPROM = 1KB
Flash EEPROM
Flash EEPROM is Electrically Erasable, Programmable, Read Only
Memory used to store instructions and data constants which the micro-
processor can access and interpret, with no loss of information when
power is off.
The system firmware is stored in Flash EEPROM. The Flash EEPROM
allows the firmware to be upgraded by downloading the files containing
the new firmware. It can be erased and reprogrammed more than 10,000
times. The term “Flash” means that bytes cannot be individually erased.
A block or the whole device is erased at the same time and the block or
whole device is then reprogrammed.
The normal method of downloading new firmware is to send the unit the
files containing the code using either the GO.EXE utility or printing the
file to the unit. This requires using an appropriate host utility and can be
done through the parallel port. See Firmware Downloading in Chapter 3
for the procedures.